allenai/quartz huggingface dataset:
Background: Water becomes more dense when it is colder and when it has more salt.

Question: Water found on Earth's cold regions is _____ dense that water found on Earth's hot regions.
Choices:
more
less
Answer: A
Background: Bigger atoms have more electrons.

Question: Evan has a 10 meter atom model. Quentin has a 20 meter atom model. Whose atom would probably have more electrons if they are different elements to the same scale?
Choices:
Evan's
Quentin's
Answer: B
Background: Gravity is a pull which all matter exerts on all other matter, the more mass, the stronger the pull.

Question: James is a much smaller person than Sally. Which person has more gravity?
Choices:
Sally
James
Answer: A
Background: The surface is heated by the Sun and some of that heat radiates back into the air. This makes the temperature higher near the surface than at higher altitudes.

Question: The farther from sea level that you get the
Choices:
cooler it is
warmer it is
Answer: A
Background: The higher the pH value is, the stronger the base.

Question: Ulysses has a solution with a pH of 10. Reilly has a solution with a pH of 14. Who has a stronger base?
Choices:
Ulysses
Reilly
Answer: B
Background: At higher temperatures, particles of reactants have more energy, so they move faster.

Question: If Milo is experimenting in his lab and he decreases the temperature in the room, what happens to the energy of the particles in that room?
Choices:
it increases
it decreases
Answer: B
Background: Chemical weathering increases as: Temperature increases: Chemical reactions proceed more rapidly at higher temperatures.

Question: John was redoing the siding on his house when he noticed something interesting. As the temperature increases, the weathering effect
Choices:
Decreases
Increases
Answer: B
Background: The closer to the surface an aquifer is, the easier it is to get the water.

Question: Reid installed an aquifer 20m from the surface. Will installed an aquifer 10m from the surface. Whose aquifer is harder to get water from?
Choices:
Reid
Will
Answer: A
Background: The voice becomes deeper as the larynx in the throat grows larger.

Question: As a boy grows to a man and his larynx grows larger, his voice gets
Choices:
deeper
higher.
Answer: A
Background: As the water is pumped out, the water table slowly falls, requiring wells to be dug deeper, which takes more money and energy.

Question: Milo loves to dig wells for a living. If he needs to dig a well deeper to reach water, what does that do to the money and energy it takes to dig the well?
Choices:
increases
decreases
Answer: A
Background: As more resistors are added in parallel, the total current strength increases.

Question: Mike adds more and more resistors into his parallel circuit, which causes the total current strength to
Choices:
increase
decrease
Answer: A
Background: Less massive objects also have less gravity than more massive objects.

Question: Mary was comparing the size of two objects. If she examined a light orange and compared it with a heavy watermelon, which would generate less gravity?
Choices:
orange
watermelon
Answer: A
Background: Increased resource use generally means more waste; electronic waste from developed nations is a growing problem in the developing world.

Question: If people use a little bit of energy they create
Choices:
less waste
more waste
Answer: A
Background: Better farming techniques and machines increased the food supply and the distribution of food.

Question: If farming techniques would be lost, there might be _____ people that starve and go hungry.
Choices:
more
less
Answer: A
Background: Bigger atoms have more electrons.

Question: Jan is taking a class where she is learning about atoms. She knows that atoms have electrons, and that atoms that are bigger have
Choices:
more electrons
fewer electrons
Answer: A
Background: So more water is displaced by a bigger body than a smaller one.

Question: Fred fills two buckets with the same amount of water. He puts a melon in one bucket and an orange in the other. In which bucket will the water rise the least?
Choices:
the one with the orange
the one with the melon
Answer: A
Background: Warm air is less dense than cool air, so it rises higher in the troposphere.

Question: If air warms, it becomes _____ dense.
Choices:
less
more
Answer: A
Background: The further objects are away from each other, the smaller the gravitational force.

Question: The sun exerts gravitational force on all the planets, which has a higher gravitational force
Choices:
earth
mars
Answer: A
Background: For a given medium such as air, sound has a slower speed at lower temperatures.

Question: If Mary is blowing an air horn underwater and she lowers the temperature of the water, what will happen to the speed of the sound waves generated by the air horn?
Choices:
increase
decrease
Answer: B
Background: The higher the pH value is, the stronger the base.

Question: If we find something with a low pH value that is likely to be
Choices:
acidic
basic
Answer: A
Background: Genotypes with greater fitness produce more offspring and pass more copies of their alleles to the next generation.

Question: Leo is working in a lab studying genotypes. He notices that the genotypes that are less fit produce
Choices:
less offspring.
more offspring
Answer: A
Background: Differences in air pressure over the surface of the Earth result in wind. The greater the differences in air pressures, the stronger the wind.

Question: Thea moved to a town that has smaller differences in air pressure than her hometown. The new city likely experiences _____ wind.
Choices:
more
less
Answer: B
Background: Alkanes with more carbon atoms have higher boiling and melting points, so some of them are solids at room temperature.

Question: If Milo removes carbon atoms from his alkane while working in his science lab, what happens to the melting point of that alkane?
Choices:
increases
decreases
Answer: B
Background: The Moon has a greater effect on the tides because, although it is much smaller than the Sun, it is much closer.

Question: Mars has _____ effect on the tides than the Moon.
Choices:
more
less
Answer: B
Background: The size of an ocean wave depends on how fast, over how great a distance, and how long the wind blows. The greater each of these factors is, the bigger a wave will be.

Question: John is relaxing at the beach watching the waves when the wind begins to let up. When the wind begins to blow slower, what happens to the size of the waves?
Choices:
increase
decrease
Answer: B
Background: Objects with greater mass have a stronger force of gravity.

Question: The sun has a _____ force of gravity than the moon.
Choices:
weaker
stronger
Answer: B
Background: For a given medium, sound waves travel more slowly at lower temperatures.

Question: John was watching the sound waves in his electronic monitor when he noticed something. The speed of the sound waves was faster when the temperature was
Choices:
higher
lower
Answer: A
Background: Longer wavelength electromagnetic waves have lower frequencies, and shorter wavelength waves have higher frequencies.

Question: Eric is looking at the shortest electromagnetic wave he has seen today. This wave has the _____ frequency of the day.
Choices:
highest
lowest
Answer: A
Background: Countries with more industry produce more hazardous wastes than those with little industry.

Question: James loved to travel the world. In his travels, he noticed that America contained a lot of industry while China contained not much industry at all. Which country produced less hazardous wastes?
Choices:
America
China
Answer: B
Background: The voice becomes deeper as the larynx in the throat grows larger.

Question: A person that has a small larynx will have what type of voice?
Choices:
High
low
Answer: A
Background: The closer to the surface an aquifer is, the easier it is to get the water.

Question: An aquifer near the surface will provide _____ access to its water than one further down.
Choices:
easier
harder
Answer: A
Background: Plug-in hybrids run for a longer time on electricity and so are less polluting than regular hybrids.

Question: Do electric cars pollute more or less than gas cars?
Choices:
more
less
Answer: B
Background: Nations that have more industry produce more hazardous waste.

Question: The United States manufactured many more products last year than Belize did. This results in _____ producing a higher amount of hazardous waste.
Choices:
Belize
the United States
Answer: A
Background: The more current, the stronger the electromagnet.

Question: Dan was excited to try out an electromagnet and was happy when it was very effective. He knew however that if he changed the current he could make it weaker. How should he adjust the current?
Choices:
decrease it
increase it
Answer: A
Background: In the mesosphere, temperature decreases as altitude increases.

Question: Mikey is studying the mesosphere. He is looking at temperatures at various altitudes within this layer of the atmosphere. If he took the temperature at 31 miles above the Earth's surface, and then again at 40 miles above the Earth's surface, the temperature would be higher at a height of
Choices:
31 miles
40 miles
Answer: A
Background: Less photosynthesis means that plants and phytoplankton produce less food.

Question: If plants are able to photosynthesize then they have
Choices:
less food
more food
Answer: B
Background: Because all electromagnetic waves travel at the same speed through space, a wave with a shorter wavelength must have a higher frequency, and vice versa.

Question: If Jim is projecting electromagnetic waves out into space and he decreases the size of the wavelength being transmitted, what happens to the frequency of that wavelength?
Choices:
decreases
increases
Answer: B
Background: The more field lines that are drawn, the stronger the field.

Question: Shane wants a field that is very strong. In order do achieve this goal, Shane needs to draw
Choices:
less field lines
more field lines
Answer: B
Background: Low food supply or a lack of space can lower birth rates, increase death rates, or lead to emigration.

Question: An decrease in birth rates indicates a/an _____ in the food supply.
Choices:
decrease
increase
Answer: A
Background: In an inverse relationship, when one variable increases, the other variable decreases.

Question: Dan does not want lunch, and Dan has some money. If he does not get a lunch, Dan's money will
Choices:
increase
decrease
Answer: A
Background: The larger the animal, the heavier the exoskeleton, making movement more difficult.

Question: When an animal is larger it needs to have a
Choices:
smaller skeleton
larger skeleton
Answer: B
Background: Exhaling, or breathing out, decreases the size of the chest, which increases air pressure inside the lungs.

Question: A doctor was doing some lung tests on a patient and testing the air pressure inside the patient's lungs. She found that when the patient's chest got smaller while expelling air that the pressure in the patient's lungs got
Choices:
higher
lower
Answer: A
Background: In a series circuit, the resistance increases as more resistors are added in series.

Question: If Eric tries to get less resistance in a series circuit, the number of resistors should
Choices:
increases
decreases
Answer: B
Background: So more water is displaced by a bigger body than a smaller one.

Question: Fred fills two buckets with the same amount of water. He puts a melon in one bucket and an orange in the other. In which bucket will the water rise the highest?
Choices:
the one with the orange
the one with the melon
Answer: B
Background: Developing nations will also increase demands on natural resources as they build more factories.

Question: If China decides to build more factories to produce goods, what will happen to their demand for natural resources?
Choices:
increase
decrease
Answer: A
Background: The temperature of matter increases with the added energy.

Question: If you take a lot of energy out of some food the temperature of it will
Choices:
increase
decrease
Answer: B
Background: If the gas is cooled, the particles will move more slowly, because they will have less energy.

Question: John is playing around with different temperature settings on his bunsen burner. If he cools down a gas in the burner and then lets the gas heat up, what would happen to the gas particles as the temperature got higher?
Choices:
they would slow down
they would speed up
Answer: B
Background: Bigger waves have more energy.

Question: Eric is surfing. The larger wave can likely push him
Choices:
farther
less far
Answer: A
Background: With higher levels of dissolved carbon dioxide in ocean water, the water becomes more acidic.

Question: Bob is testing samples of ocean water from different places. The sample of water from off India's coast has more dissolved carbon dioxide, than the sample of water from off the United States' coast. Therefore, the water from _____ coast is more acidic.
Choices:
India's
United States'
Answer: A
Background: Size restriction: The final body size is limited because as the body size increases, the surface area to volume ratio decreases.

Question: A decrease in body size will cause a concomitant _____ in its surface area to volume ratio.
Choices:
increase
decrease
Answer: A
Background: This means that as wavelengths get shorter, more waves move past a particular spot in the same amount of time.

Question: If wavelengths become longer, there will be _____ move past a particular spot.
Choices:
more
less
Answer: B
Background: With less ozone in the stratosphere, more UV rays reach the ground.

Question: If Mona is observing the atmosphere and measuring the amount of ozone in it, what happens to the amount of UV rays that will reach the ground if she notices the amount of ozone in the stratosphere is decreasing?
Choices:
increase
decrease
Answer: A
Background: The folds present in the membrane increase the surface area allowing more ribosomes to be present on the ER, thereby allowing greater protein production.

Question: John notices a ribosome has many more folds than another one. The ribosome with less folds likely produces _____ proteins
Choices:
fewer
more
Answer: A
Background: Smaller tributary glaciers, like tributary streams, flow into the main glacier in their own shallower U-shaped valleys.

Question: Sandra sees a tiny glacier, and notes that it has smaller tributary glaciers flowing into it, in valleys that are
Choices:
shallow
deep
Answer: B
Background: Aerobic exercise increases the size and strength of muscles in the heart and helps all your muscles develop greater endurance.

Question: If one does no aerobic exercises, their heart muscles will become
Choices:
stronger
weaker
Answer: B
Background: More advanced farming practices allowed a single farmer to grow food for many more people.

Question: Farmer Bill got an older machine to sift his wheat. This machine causes him to grow _____ food.
Choices:
more
less
Answer: B
Background: Breast cancer is rare in teens. It becomes more common as women get older.

Question: Sue is celebrating her 60th birthday. She likely has a _____ chance of breast cancer than when she was a teen.
Choices:
greater
lesser
Answer: A
Background: The more mass a moving object has or the faster its moving, the greater its momentum.

Question: Two cars are going down the road, one weighs a ton, the other weighs two tons. If both crash, the car weighing one ton will have a momentum that is
Choices:
smaller
larger
Answer: A
Background: The faster the clicks of a Geiger counter occur, the higher the level of radiation.

Question: A Geiger counter is clicking away, and suddenly slows down quite a lot. The counter is telling people that the level of radiation is
Choices:
lower
higher
Answer: A
Background: A given volume of a denser substance is heavier than the same volume of a less dense substance.

Question: Compared to a box of feathers a box of bricks would be
Choices:
lighter
heavier
Answer: B
Background: A: The more carbon atoms there are, the greater the number of possible arrangements of carbon atoms.

Question: Eric added more and more carbon atoms to the solution. The number of possible arrangements of carbon atoms
Choices:
increases
decreases
Answer: A
Background: With higher levels of dissolved carbon dioxide in ocean water, the water becomes more acidic.

Question: If low levels of carbon dioxide are absorbed by the oceans, would shellfish that can be easily killed by acidic water be
Choices:
more likely to die
less likely to die?
Answer: B
Background: The upper rock layers are much younger.

Question: Tom was digging in his backyard one day, after two inches he picked up an oval shaped rock. Tom kept digging and after twelve inches he picked up a square shaped rock, which rock was older?
Choices:
The Oval Shaped Rock
The Square Shaped Rock
Answer: B
Background: However, the melanocytes of people with darker skin produce more melanin.

Question: The lighter someone's skin is the _____ melanin they have.
Choices:
less
more
Answer: A
Background: The Moon has a greater effect on the tides because, although it is much smaller than the Sun, it is much closer.

Question: Tina had a large rock on the beach. Rich had a large rock 10 miles inland. The person with the rock that has more effect on the tides is
Choices:
Rich
Tina
Answer: B
Background: We can say that resistance and current in an electric circuit areinversely proportional, because as the one increases, the other decreases, and vice versa.

Question: Harold increased the current in a circuit. The resistance now is
Choices:
higher
lower
Answer: B
Background: The more curved the surface of a lens is, the more it refracts light.

Question: Jeff built a lens with the highest refraction possible. The lens is likely _____ curved.
Choices:
very
not
Answer: A
Background: A decrease in greenhouse gas levels decreases global temperature and an increase raises global temperature.

Question: If you are able to add greenhouse gases the temperature will
Choices:
go up
go down
Answer: A
Background: Developing nations will also increase demands on natural resources as they build more factories.

Question: Rupert is evaluating the impact of factories on the natural resources of developing nations. If Nation X subtracted 100 new factories, it will _____ demands on their natural resources.
Choices:
decrease
increase
Answer: A
Background: But the more computing power that goes into the model and the care with which the scientists construct the model can increase the chances that a model will be accurate.

Question: Mona is developing a computerized model to detect changes in weather patterns for her farming business. If she removes computing power from the computer she is using to develop the model, what happens to the chances that model will be correct?
Choices:
increase
decrease
Answer: B
Background: Therefore, increasing the surface area of solid reactants increases the reaction rate.

Question: If Mona is creating a reaction using solid reactants and she increases the surface area of those reactants, what happens to the reaction rate?
Choices:
increases
decreases
Answer: A
Background: When there are more sunspots the Sun is more active and there are more solar storms and more of the Sun's energy reaches the Earth.

Question: Mary loves to observe the Sun. If she's looking at the Sun one day and notices more sunspots then she usually sees, what is happening to the amount of solar energy reaching the Earth?
Choices:
increasing
decreasing
Answer: A
Background: A: The more carbon atoms there are, the greater the number of possible arrangements of carbon atoms.

Question: If Mona is manipulating carbon atoms in her science lab and she decreases the number of carbon atoms she has to work with, what happens to the number of possible arrangements the carbon atoms can take?
Choices:
increase
decrease
Answer: B
Background: Alkanes with more carbon atoms have higher boiling and melting points, so some of them are solids at room temperature.

Question: Compared to an item with few carbon atoms an item with many carbon atoms will boil
Choices:
faster
slower
Answer: B
Background: Wave frequency can be measured by counting the number of crests or compressions that pass the point in 1 second or other time period. The higher the number is, the greater is the frequency of the wave.

Question: If there are more crests coming through, there will be _____ wave frequency.
Choices:
more
less
Answer: A
Background: The closer objects are to each other, the stronger the gravitational force between them.

Question: If Jim is playing with some objects and moving them around and he moves them farther apart, the gravitational force between them
Choices:
increases
decreases
Answer: B
Background: Better farming techniques and machines increased the food supply and the distribution of food.

Question: Jonah's family was barely getting any food when they plowed the field by hand, but when they got machines to help, the food supply
Choices:
decreased
increased
Answer: B
Background: Higher-frequency waves have more energy.

Question: Sasha increases the frequency of a wave. This wave now has _____ energy.
Choices:
more
less
Answer: A
Background: Areas near the equator are warmer than areas near the poles because they receive more direct sunlight.

Question: A person moving south from the North Pole will receive _____ direct sunlight.
Choices:
more
less
Answer: A
Background: A wave caused by a disturbance with more energy has greater amplitude.

Question: A dolphin is swimming through waves in the ocean. The dolphin jumps out of the water then falls back in, creating a wave through the dolphin's disturbing the water. Nearby, turtle flaps it's fin and makes another wave. The waves the dolphin made will have an amplitude that is
Choices:
lesser
greater
Answer: A
Background: Waves with shorter wavelengths have more energy.

Question: Lana is zapping things with light of varying wavelengths. When she zaps things with longer wavelength light, the energy imparted is
Choices:
greater
lesser
Answer: B
Background: The higher the temperature, the more energy the particles have and the faster they will move and diffuse.

Question: If a particle were to warm up, it will have _____ energy.
Choices:
more
less
Answer: A
Background: The older a person is, the greater their chance of developing a cardiovascular disease.

Question: Milo is older then Jerry. Who has the lesser chance of developing cardiovascular disease?
Choices:
Milo
Jerry
Answer: B
Background: Many of the worlds people live with water scarcity, and that percentage will increase as populations increase and climate changes.

Question: Hundreds of years ago there were fewer people on the Earth than there are today. Because of this, there was
Choices:
more water
less water.
Answer: A
Background: Warm air is less dense than cool air, so it rises higher in the troposphere.

Question: If Jim lowers the temperature of the air inside his balloon, will his balloon rise higher into the air or sink towards the ground?
Choices:
rise higher
sink lower
Answer: B
Background: At higher temperatures, particles of reactants have more energy, so they move faster. They are more likely to bump into one another and to collide with greater force.

Question: Katie is looking at particles of reactants, and is noting that they currently are moving very slowly, and that they seem to have a little energy. These particles are likely at a temperature that is
Choices:
higher
lower
Answer: B
Background: The water table is higher when there is a lot of rain and lower when the weather is dry.

Question: John was watching the effects of weather on the groundwater in his area. He observed that as the amount of rain decreased, the level of the water table was
Choices:
Higher
Lower
Answer: B
Background: Many observatories are built on high mountains. There is less air above the telescope, so there is less interference from the atmosphere.

Question: If Jim moves his telescope from a mountaintop to Death Valley, a location with much air above it, what will happen to the amount of interference from the atmosphere?
Choices:
increase
decrease
Answer: A
Background: With a higher the concentration of hydrogen ions, a solution is more acidic and has a lower pH.

Question: James wants to create a solution that is less acidic than others, so his concentration of hydrogen ions will be
Choices:
higher
lower
Answer: B
Background: Rougher surfaces have more friction between them than smoother surfaces.

Question: A piece of sandpaper has _____ friction than a piece of glass.
Choices:
more
less
Answer: A
Background: As more resistors are added in parallel, the total current strength increases.

Question: If Milo is making a circuit and he removes resistors from it, will the strength of the current
Choices:
increase
decrease
Answer: B
Background: Water density increases as salinity and pressure increase, or as temperature decreases.

Question: If you mixed salt water and regular water which would sink?
Choices:
regular water
salt water
Answer: B
Background: The development of better missiles fostered better rocket technologies.

Question: As we cease working to develop things our technology levels as a species
Choices:
decreases
increases
Answer: A
Background: The particles in matter are always moving. The more energy they have, the faster they move.

Question: If there are two containers of particles, the one that has the least energy will move
Choices:
slower.
faster
Answer: A
Background: The higher the temperature, the more energy the particles have and the faster they will move and diffuse.

Question: As we move faster we wind up getting
Choices:
hotter
cooler
Answer: A
Background: More advanced farming practices allowed a single farmer to grow food for many more people.

Question: As fewer computers have made work harder for people we have had to do
Choices:
more work
less work.
Answer: A
Background: Breast cancer is rare in teens. It becomes more common as women get older.

Question: What happens to Susie's chance of contracting breast cancer as she gets younger?
Choices:
increases
decreases
Answer: B
Background: The more basic a solution is, the closer its pH value will be to 14.

Question: When a number on the pH scale is very high it is said to be
Choices:
acidic
basic
Answer: B
Background: As you increase the number of carbon atoms in a hydrocarbon, the number of isomers quickly increases.

Question: Dean wants to get a smaller number of isomers to observe, so in order to do so quickly, he takes the number of carbon atoms in a hydrocarbon, and makes them
Choices:
decrease
increase
Answer: A
Background: In the thermosphere, temperatures increase as altitude increases.

Question: If Mona is flying her plane in the thermosphere and she moves to a higher altitude heading, what happens to the temperature?
Choices:
increases
decreases
Answer: A
Background: The more mass a moving object has or the faster its moving, the greater its momentum.

Question: A large object will have _____ momentum than a small object.
Choices:
more
less
Answer: A
Background: So the higher an object is above a surface, the more potential energy it has.

Question: If Mona is holding a baseball above a table and then increases the height of that baseball from the table, what happens to the potential energy of the baseball?
Choices:
increases
decreases
Answer: A
Background: Gravity is a pull which all matter exerts on all other matter, the more mass, the stronger the pull.

Question: John was watching objects fall from the sky in the simulator. He observed that items with more mass will be pulled by gravity at a rate that is
Choices:
Stronger
Weaker
Answer: A
Background: An object has greater momentum if it has greater mass, greater velocity, or both.

Question: If an big eighteen wheeler and a small wagon are both rolling down a small hill, which has less momentum?
Choices:
small wagon
eighteen wheeler
Answer: A
Background: More particles inside the container means more collisions, and more collisions mean a higher pressure.

Question: If we keep filling a balloon with oxygen particles what happens to the pressure?
Choices:
increases
decreases
Answer: A
Background: This is also called diffusion, and the process is much faster in gases than in liquids, because the particles in gases are further apart.

Question: Diffusion occurs slower in
Choices:
water
oxygen.
Answer: A
Background: The density of the atmosphere decreases with an increase in the height above sea level (altitude).

Question: What would happen to the atmosphere as Jim climbed higher up a mountain?
Choices:
it would become less dense
it would become more dense
Answer: A
Background: The closer objects are to each other, the stronger the gravitational force between them.

Question: Objects moving farther apart will have _____ gravitational force between them.
Choices:
more
less
Answer: B
Background: But the more computing power that goes into the model and the care with which the scientists construct the model can increase the chances that a model will be accurate.

Question: Stephanie had designed a machine learning algorithm to help predict earthquakes. Today, her new supercomputer arrived and she will soon run the algorithm on the more powerful computer. The new computer will _____ the accuracy of the model's predictions.
Choices:
increase
decrease
Answer: A
Background: By using multiple stages, empty fuel containers could drop away. This reduced the mass of the rocket so that it could fly higher.

Question: Ray was traveling in rocket leaving orbit. He ejects the empty fuel containers so the ship can fly
Choices:
higher
lower
Answer: A
Background: Bigger stars produce more energy, so their surfaces are hotter.

Question: Jan is comparing stars, specifically a small star and the larger Sun. Given the size of each, Jan can tell that the Sun puts out heat that is
Choices:
lesser
greater
Answer: A
Background: Many of the worlds people live with water scarcity, and that percentage will increase as populations increase and climate changes.

Question: John's town used to have little water, back when there were several thousand people. However, now that the town holds only a few hundred people, the water availability is
Choices:
scarce
plentiful
Answer: B
Background: Breast cancer is rare in teens but becomes more common as females get older.

Question: An older female is _____ likely to acquire breast cancer than a younger female.
Choices:
more
less
Answer: A
Background: More water allows more chemical reactions.

Question: By providing less water to two dry powders that would react if they were hydrated, does the rate at which the powders
Choices:
decrease?
increase
Answer: A
Background: Water also gets colder as you go deeper.

Question: As a diver goes deeper into the water, the water gets
Choices:
warmer
colder.
Answer: B
Background: As more resistors are added in parallel, the total current strength increases.

Question: Mike removes more and more resistors into his parallel circuit, which causes the total current strength to
Choices:
increase
decrease
Answer: B
Background: The pupil automatically gets bigger or smaller to let more or less light in as needed.

Question: John was observing the patient. He saw that as more light was let in, the pupil would get
Choices:
bigger
smaller.
Answer: A
Background: The harder the batter hits the ball, the greater will be its acceleration.

Question: Jim was at the baseball game with his friends. Almost immediately he observed that the harder the ball was hit, the effect on the acceleration was
Choices:
decreased
increased
Answer: B
Background: Warming up exercises increases the blood flow to the muscles and increases the heart rate.

Question: Mel is running down the street for exercise. As Mel's heart rate increases, Mel's blood flow
Choices:
decreases
increases
Answer: B
Background: Warming up exercises increases the blood flow to the muscles and increases the heart rate.

Question: When April rested on the couch, as opposed to running, she noticed that her heart was beating
Choices:
faster
slower
Answer: B
Background: A given volume of a denser substance is heavier than the same volume of a less dense substance.

Question: John has a diamond that is the same size as a beach ball. Which is likely less dense?
Choices:
diamond
ball
Answer: B
Background: Smaller tributary glaciers, like tributary streams, flow into the main glacier in their own shallower U-shaped valleys.

Question: What would happen to the size of the valley created by a tributary stream if the size of the stream were to be decreased?
Choices:
the valley would be shallower
the valley would be deeper
Answer: A
Background: When we add resistors in parallel to each other the total resistance decreases and the current increases.

Question: If current increases, that means resistance is
Choices:
increasing
decreasing
Answer: B
Background: The folds present in the membrane increase the surface area allowing more ribosomes to be present on the ER, thereby allowing greater protein production.

Question: John notices a ribosome has many more folds than another one. The ribosome with more folds likely produces _____ proteins
Choices:
fewer
more
Answer: B
Background: More UV rays increase skin cancer rates.

Question: John was studying skin disease in his research lab. He observed that the less UV rays that contact the skin resulted in skin cancer rates becoming
Choices:
Larger
Smaller
Answer: B
Background: Different types of rocks weather at different rates. More resistant types of rocks will remain longer.

Question: A piece of granite is less resistant than soapstone therefore it will last
Choices:
longer
shorter
Answer: B
Background: The density of the atmosphere decreases with an increase in the height above sea level (altitude).

Question: If Milo is hiking down a mountain and taking atmospheric density readings, what will happen to the readings as he gets closer to the top of the mountain?
Choices:
increase
decrease
Answer: A
Background: In erosion, a slower moving stream will only carry smaller particles.

Question: If a stream begins moving faster, what will happen to the size of the particles it carries?
Choices:
get bigger
get smaller
Answer: A
Background: The more dense the medium, the slower the light moves.

Question: A very rarefied medium will cause light to move
Choices:
faster
slower
Answer: A
Background: If the gas is cooled, the particles will move more slowly, because they will have less energy.

Question: When we get cold we become
Choices:
faster
slower
Answer: B
Background: The closer objects are, the stronger the gravitational pull between them.

Question: Two suns moving away from each other will have _____ gravitational pull between them.
Choices:
increasing
decreasing
Answer: B
Background: Larger alkenes have lower boiling and melting points, so they are liquids or waxy solids at room temperature.

Question: Sarah leaves coconut oil on the counter during the night when it is cool, and it is a solid. During the day, the coconut oil is a liquid, so the day is
Choices:
cooler
warmer
Answer: B
Background: The closer the charged objects are, the stronger the electrostatic force.

Question: If we have a static charged balloon and take it away from your head _____ hairs will stand up
Choices:
less
more
Answer: A
Background: For example, more people on the Earth means more people contributing to global warming and pollution.

Question: Mona lives on a planet with an unstable population. If the number of people on her planet were to decrease, what would happen to global warming on her planet?
Choices:
increase
decrease
Answer: B
Background: Because all electromagnetic waves travel at the same speed through space, a wave with a shorter wavelength must have a higher frequency, and vice versa.

Question: Compared to microwaves do x-rays, which have a much shorter wavelength than microwaves, have a
Choices:
lower frequency?
higher frequency
Answer: B
Background: In general, fossils in older rocks are less similar to modern organisms.

Question: If Mona is comparing fossils she found in very old rocks to fossils she found in newer rocks. Which fossils does she expect to be more similar to living animals?
Choices:
old rocks
newer rocks
Answer: B
Background: The greater the mass of the objects, the stronger the gravitational pull between them.

Question: If Mona makes some clay balls and adds extra clay to them, increasing their mass, what happens to the gravitational pull between the two clay balls?
Choices:
increases
decreases
Answer: A
Background: The more current, the stronger the electromagnet.

Question: A weak electromagnet is receiving _____ current.
Choices:
much
little
Answer: B
Background: The closer together the particles in a longitudinal wave are, the greater the amplitude.

Question: Fred found a longitudinal wave. The particles are getting further apart. The amplitude is
Choices:
increasing
decreasing
Answer: B
Background: An object has greater momentum if it has greater mass, greater velocity, or both.

Question: An object with a greater mass than another will have _____ momentum.
Choices:
less
more
Answer: B
Background: When we add resistors in parallel to each other the total resistance decreases and the current increases.

Question: Dean turns the current down a lot, expecting that the resistance will
Choices:
shrink
grow
Answer: B
Background: Lower temperature and higher salinity yield the densest water.

Question: Noah compares the density of the water in a pond during a hot July day and a cold winter morning. The water on the July day is
Choices:
more dense
less dense.
Answer: B
Background: The density of the atmosphere decreases with an increase in the height above sea level (altitude).

Question: Donna is noting that the atmosphere is very dense where she's visiting, so compared to her home she must be at an altitude that is
Choices:
higher
lower
Answer: B
Background: Warm water cant hold as much dissolved oxygen as cool water, so an increase in the temperature of water decreases the amount of oxygen it contains.

Question: Jeff heated the pot of boiling water. What happens to the dissolved oxygen contained within the water?
Choices:
it increases
it decreases
Answer: B
Background: In erosion, the higher the elevation, the farther the stream is from where it will reach base level and the more cutting it has to do.

Question: A stream in a state with a higher average elevation will have to do _____ cutting to reach base level that in a state with a lower average elevation.
Choices:
more
less
Answer: A
Background: The folds present in the membrane increase the surface area allowing more ribosomes to be present on the ER, thereby allowing greater protein production.

Question: A membrane with more folds will have _____ than one with less folds.
Choices:
more
less ribosomes
Answer: A
Background: Acids have pH values below 7. The lower the pH value, the more strongly acidic the substance.

Question: Alan's lye has a higher pH than his soda. His lye was _____ acidic.
Choices:
less
more
Answer: A
Background: Bacteria with a mutation the helps resist antibiotics increase in numbers, so the mutation becomes more common.

Question: If Milo is growing a certain type of bacteria that can resist antibiotics and he decreases the amount of bacteria he is growing, would mutations in the bacteria
Choices:
increase
decrease
Answer: B
Background: As the water is pumped out, the water table slowly falls, requiring wells to be dug deeper, which takes more money and energy.

Question: Milo loves to dig wells for a living. If he needs to dig a well less deep to reach water, what does that do to the money and energy it takes to dig the well?
Choices:
increases
decreases
Answer: B
Background: A sunscreen with a higher SPF value protects the skin longer.

Question: Matt started a job where he will be outside for only short periods. Which would be sufficient to protect his skin during these short periods of sun exposure, a
Choices:
higher SPF sunscreen
lower SPF sunscreen.
Answer: B
Background: Decreasing air temperature increases atmospheric pressure.

Question: John turned up the thermostat in his room. As the temperature of the room got higher, would the air pressure in the room
Choices:
decrease?
increase
Answer: A
Background: We can say that resistance and current in an electric circuit areinversely proportional, because as the one increases, the other decreases, and vice versa.

Question: When resistance is decreased in a wire what happens to the current?
Choices:
decreases
increases
Answer: B
Background: The darker the urine, the less water it contains.

Question: A doctor took two urine samples from Kyle, one on Tuesday and one on Wednesday. The Tuesday sample was a darker color than the Wednesday sample, which means that there was less water in
Choices:
the Tuesday sample
the Wednesday sample.
Answer: A
Background: Bigger atoms have more electrons.

Question: Jan is taking a class where she is learning about atoms. She knows that atoms have electrons, and that atoms that are smaller have
Choices:
more electrons
fewer electrons
Answer: B
Background: Warmer molecules vibrate faster than cooler ones.

Question: Lisa is cooling soup in the refrigerator. The molecules will begin to vibrate _____ as the soup cools down.
Choices:
slower
faster
Answer: A
Background: The voice becomes deeper as the larynx in the throat grows larger.

Question: If your larynx were to shrink, your voice would become _____ deep.
Choices:
more
less
Answer: B
Background: The faster the clicks of a Geiger counter occur, the higher the level of radiation.

Question: Mahana was excited to see the nuclear bomb test and decided to sail closer for a better look. As he approaches the lowest levels of radioactivity at the test site would the rate of clicking on his Geiger counter get
Choices:
faster or
slower
Answer: B
Background: Electromagnetic waves with shorter wavelengths have higher frequencies and more energy.

Question: If we find an electromagnetic wave with very short wavelengths, it will likely have _____ energy.
Choices:
much
little
Answer: A
Background: However, the melanocytes of people with darker skin produce more melanin.

Question: Since Kim has less melanin than Jennifer, when they lay out in the sun Jennifer's skin is _____ than Kim's.
Choices:
darker
lighter
Answer: A
Background: Larger telescopes can collect more light.

Question: A increase in the size of a telescope results in a/an _____ in ability to collect light.
Choices:
increase
decrease
Answer: A
Background: The elastic force increases the more the material is stretched or compressed.

Question: When a rubber band is relaxed, its elastic force
Choices:
increases
decreases
Answer: B
Background: As you increase the number of carbon atoms in a hydrocarbon, the number of isomers quickly increases.

Question: John was looking in the microscope at some very small objects. What he observed was that the larger number of carbon atoms he saw, the number of isomers would quickly
Choices:
increase
decrease
Answer: B
Background: When there are more sunspots the Sun is more active and there are more solar storms and more of the Sun's energy reaches the Earth.

Question: When astronomers noticed a halving of Sun spot activity, did they predict that the Earth's temperature would
Choices:
increase
decrease?
Answer: B
Background: The further objects are away from each other, the smaller the gravitational force.

Question: Andy put two magnets at the end of the table, Karen put two magnets right next to each other. Whose magnets had a lesser gravitational force?
Choices:
Andy
Karen
Answer: A
Background: The surface is heated by the Sun and some of that heat radiates back into the air. This makes the temperature higher near the surface than at higher altitudes.

Question: Devon's cat, Fluffy, is looking for a nice warm spot to lay out in the sun. Because of how the sun heats the earth, and how some heat radiates into the air, the cat laying on the ground, rather than high up in a tree branch, would keep the cat
Choices:
cooler
warmer
Answer: B
Background: For a given medium, sound waves travel more slowly at lower temperatures.

Question: When it is very cold what happens to the speed of items?
Choices:
speed up
slow down
Answer: B
Background: Objects with greater mass have a stronger force of gravity between them.

Question: Jupiter and Saturn are much larger in mass than Earth and Venus, therefore the force of gravity between Jupiter and Saturn is _____ than the force of gravity between Earth and Venus.
Choices:
greater
lesser
Answer: A
Background: Light-skinned people get sunburned more quickly than people with darker skin.

Question: If Milo has dark skin and Jerry has light skin, which person will sunburn less easily?
Choices:
Milo
Jerry
Answer: A
Background: The more carbon atoms a hydrocarbon has, the greater the number of isomers.

Question: When we look at a molecule we can determine that if it it has few atoms it will typically have _____ isomers
Choices:
many
few
Answer: B
Background: The more carbon atoms a hydrocarbon has, the greater the number of isomers.

Question: A hydrocarbon with few carbon atoms will have _____ isomers.
Choices:
fewer
many
Answer: A
Background: When a volume of water is cooled, the molecules move less vigorously, so same number of molecules takes up less space and the water is denser.

Question: When Shane goes swimming in warmer water, he can move about quickly, whereas in cooler water, Shane's movement is
Choices:
faster
slower
Answer: B
Background: The farther the object is stretched or compressed, the greater its elastic potential energy is.

Question: When we depress a spring down a lot what happens to the potential energy?
Choices:
increases
decreases
Answer: B
Background: Warm water cant hold as much dissolved oxygen as cool water, so an increase in the temperature of water decreases the amount of oxygen it contains.

Question: Mary is taking measurements of the amount of oxygen in samples of water. If she measured the total levels of dissolved oxygen in a sample at 70 degrees fahrenheit and compared it to a sample at 80 degrees fahrenheit, which would contain less dissolved oxygen?
Choices:
80 degrees fahrenheit
70 degrees fahrenheit
Answer: A
Background: At higher temperatures, particles of reactants have more energy, so they move faster.

Question: When observing reactants and their particles, Shane increases the temperature they're exposed to, noting that they now move
Choices:
faster
slower
Answer: A
Background: Developing nations will also increase demands on natural resources as they build more factories.

Question: When a country starts manufacturing things they need to have
Choices:
less resources
more resources
Answer: B
Background: The more tightly packed the particles inside the material are, the more dense we say they are.

Question: Sasha is throwing bottles into the lake. Some bottles are filled with sand, and some only have a tiny bit of sand in them. The bottles filled with sand will sink first because they are
Choices:
less dense
more dense
Answer: B
Background: More pollutants mean poorer air quality.

Question: If Mona lives in a city that begins producing a smaller amount of pollutants, what happens to the air quality in that city?
Choices:
increases
decreases
Answer: A
Background: A thinner wire is more difficult for electrons to move through than a thicker wire.

Question: If Jim is transmitting electricity through a wire and he increases the size of that wire, the electrons move through it
Choices:
easier
harder
Answer: A
Background: The development of better missiles fostered better rocket technologies.

Question: Ryan wants to have better technology in the world, so do have that, he will need for the things currently being developed to be
Choices:
better
worse
Answer: A
Background: More pollutants mean poorer air quality.

Question: Michael is studying the air quality of various cities. He finds that there are many more pollutants in the air in Mexico City, than there are in the air of Chicago. Therefore, the air quality will be higher in
Choices:
Chicago
Mexico City
Answer: A
Background: The forest habitat of elephants has also decreased in size due to humans moving in, so the numbers of the elephants have decreased.

Question: The elephants were moved to a reservation where they could thrive, since their habitat in the wild was shrunk too far. The elephant numbers were now
Choices:
larger
smaller
Answer: B
Background: The development of better missiles fostered better rocket technologies.

Question: Milo's country spends a lot of energy developing better missiles. This means their rocket technologies have
Choices:
increased
decreased
Answer: A