allenai/quartz huggingface dataset:
Background: The more carbon atoms a hydrocarbon has, the greater the number of isomers.

Question: Eric has a hydrocarbon with 20 carbon atoms. Rita has a hydrocarbon with 35 carbon atoms. Whose hydrocarbon has more isomers?
Choices:
Eric
Rita
Answer: B
Background: With higher levels of dissolved carbon dioxide in ocean water, the water becomes more acidic.

Question: If Jim lowers carbon dioxide to the ocean, the level of acidity in the ocean becomes
Choices:
greater
smaller
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: Don sees wavelengths using a spectrometer. A wavelength that is very short likely has a _____ frequency compared to a longer one.
Choices:
lower
higher
Answer: B
Background: As the population increases, the food supply, or the supply of another necessary resource, may decrease.

Question: If the population of India were to double, their people should expect to have _____ food available.
Choices:
more
less
Answer: B
Background: As humidity increases, the water potential gradient across the inside and outside the leaf become more equal, and so the rate of transpiration decreases.

Question: Joe noticed that the humidity inside the greenhouse was getting very low, so he turned the sprinklers on to make it more humid. Thus, when the water potential gradient across the inside and outside of the leaf becomes equal, the rate of transpiration will
Choices:
increase
decrease.
Answer: A
Background: An object with greater mass or greater velocity has more kinetic energy.

Question: John was watching the particle accelerator and made an observation. The greater an objects mass and velocity, the kinetic energy was
Choices:
Greater
Less
Answer: A
Background: Bases have pH values above 7. The higher the pH value, the more strongly basic the substance.

Question: Christy is in lab measuring the pH values of some substances. The first substance she measures has a pH value of 8. The second substance has a pH value of 9. Compared to the first, the second substance can be said to be _____ basic.
Choices:
less.
more
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 going down a mountain will have to do _____ cutting.
Choices:
much
little
Answer: A
Background: Higher frequency waves have greater energy.

Question: Waves that come in very fast to the shores have
Choices:
more energy
less energy
Answer: A
Background: When we add resistors in parallel to each other the total resistance decreases and the current increases.

Question: If current decreases, that means resistance is
Choices:
increasing
decreasing
Answer: A
Background: The greater the mass of the objects, the stronger the gravitational pull between them.

Question: Two small planets are near each other, and two large planets are near each other. The smaller planets, compared to the larger planets will have a gravitational pull that is
Choices:
weaker
stronger
Answer: A
Background: So the higher an object is above a surface, the more potential energy it has.

Question: Dane is dropping bouncy balls out of windows. He drops a green ball out of the first story window, then a red ball out of the second story window. The ball with the least potential energy is the
Choices:
red ball
green ball
Answer: B
Background: The closer together the particles are, the greater the amplitude of the wave.

Question: Derek is noting how close particles are, and sees that they are very far apart. Since the particles are so far apart, the amplitude of the wave will be
Choices:
greater
lesser
Answer: B
Background: Less photosynthesis means that plants and phytoplankton produce less food.

Question: Ollie moved a tomato plant to an area that receives more sunlight. The tomato plant will now produce _____ food.
Choices:
more
less
Answer: A
Background: The sooner cancer is treated, the greater the chances of a cure.

Question: Compared to a person who chooses to start right away to undergo cancer treatments after being diagnosed, would a person with the same cancer who undergoes treatment a long time after learning of their diagnosis be
Choices:
less likely to be cured?
more likely to be cured
Answer: A
Background: The warmer a climate is, the more types of vegetation it will have and the greater the rate of biological weathering.

Question: As Earth's climate becomes warmer it will develop _____ varieties of vegetation?
Choices:
less
more
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 denser?
Choices:
diamond
ball
Answer: A
Background: For a given medium such as air, sound has a slower speed at lower temperatures.

Question: Would a microphone designed to listen for avalanches detect the sound of falling snow sooner on a
Choices:
warm day
colder day?
Answer: A
Background: When the heart expels more blood with each stroke, the heart has to beat less often in order to maintain the same volume of blood flow.

Question: Jan had a very low heart rate, but was perfectly healthy, indicating that her heart expels blood in amounts that are
Choices:
greater
lesser
Answer: A
Background: The more extreme the amount of metamorphism, the more difficult it is to tell what the original rock was.

Question: If pressure has exerted less force on a rock and decreased it's metamorphism, would it be
Choices:
easier to determine what the original rock was
harder to determine what the original rock was?
Answer: A
Background: Greater use of oil and other fossil fuels causes more pollution.

Question: If the citizens of Europe began using oil, they should have _____ pollution.
Choices:
more
less
Answer: A
Background: Aerobic exercise increases the size and strength of muscles in the heart and helps all your muscles develop greater endurance.

Question: What will happen to Jim's muscle strength if he exercises more then he has in the past?
Choices:
his muscles will become stronger
his muscles will become weaker
Answer: A
Background: The bigger the waves are and the more sediment they carry, the more erosion they cause.

Question: Karly is studying two rivers and how they are affecting the rock around them. If the 2nd river she looks at is twice as big as the first river she is studying, then Karly would expect to see _____ erosion caused by the 2nd river.
Choices:
more
less
Answer: A
Background: If we have two materials with the same volume, the material with a higher mass will be more dense.

Question: If we have a bag of feathers and a bag of bricks of the same volume, the heavier item will be the
Choices:
feathers
bricks
Answer: B
Background: As the distance between the objects increases, the force of gravitational attraction decreases.

Question: When we launch a rocket into space the attraction level the rocket has to the Earth
Choices:
increases
decreases
Answer: B
Background: Anaerobic exercises cause muscles to get bigger and stronger.

Question: When we spend less and less time lifting a lot of weights we become
Choices:
weaker
stronger
Answer: A
Background: Larger alkenes have lower boiling and melting points, so they are liquids or waxy solids at room temperature.

Question: Tommy was assigned to work with alkene compounds for his science project. When he took them out he noticed that they were in liquid form before he even worked with them. This means that the alkenes were
Choices:
small alkenes
large alkenes
Answer: B
Background: For example, more people on the Earth means more people contributing to global warming and pollution.

Question: John looked at the graphs and noticed something. As the population of people grew larger, the rate of global warming was
Choices:
Less
Greater
Answer: B
Background: Temperature affects the rate at which photosynthesis, cellular respiration and decomposition take place. The rate of reaction increases with increasing temperature and decreases at lower temperatures.

Question: If the temperature in the environment decreases, what will happen to the rate of cellular respiration?
Choices:
increases
decreases
Answer: B
Background: Its harder to overcome friction between heavier objects and the floor than it is between lighter objects and the floor.

Question: Fred was moving a desk across the room. He then pushed a chair and it was much easier. This is because the lighter chair had _____ friction with the floor.
Choices:
less
more
Answer: A
Background: Exhaling, or breathing out, decreases the size of the chest, which increases air pressure inside the lungs.

Question: Jeff takes a breath and lets it out. When do his lungs experience the least air pressure?
Choices:
after inhaling
after exhaling
Answer: A
Background: The pupil automatically gets bigger or smaller to let more or less light in as needed.

Question: Sandra is in a dark building and then suddenly goes exits onto a sunny street. Sarah's pupils will do this in response to the new bright light
Choices:
shrink
grow
Answer: A
Background: A decrease in greenhouse gas levels decreases global temperature and an increase raises global temperature.

Question: If Mona's country normally emits a lot of greenhouse gas, but one day decides to lower the amount they emit, what will happen to the global temperature?
Choices:
increase
decrease
Answer: B
Background: The farther apart you move your hands, the stronger the force of the rubber band pulling your hands together.

Question: Alan has a rubber band on his hands. He pulls his hands apart and the rubber bands force
Choices:
increases
decreases
Answer: A
Background: Bases have pH values above 7. The higher the pH value, the more strongly basic the substance.

Question: If we tested a substance and the number was high on a pH test then the item is
Choices:
acidic
basic
Answer: B
Background: More UV rays increase skin cancer rates.

Question: If you spend less time out in the sun then getting skin cancer is
Choices:
less likely
more likely
Answer: A
Background: If we increase the resistance in a series circuit, by adding more resistors, then the total current decreases.

Question: Quint adds more resistors in a circuit to increase the resistance. The total current in the series circuit
Choices:
increases
decreases
Answer: B
Background: The more carbon atoms a hydrocarbon has, the greater the number of isomers.

Question: Compared to a hydrocarbon with a single carbon atom, would a hydrocarbon with 10 carbon atoms have
Choices:
a greater number of isomers
fewer isomers?
Answer: A
Background: The glaciers on Earth are getting smaller and smaller as Earths temperature rises.

Question: If Mona is measuring the size of a glacier at the North Pole and she notices that it has been getting larger over the years, what can she conclude about the Earth's temperature?
Choices:
decreasing
increasing
Answer: A
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 cooled the pot of boiling water. What happens to the dissolved oxygen contained within the water?
Choices:
it increases
it decreases
Answer: A
Background: Bigger stars produce more energy, so their surfaces are hotter.

Question: Milo is trying to heat his room with a space heater. If he turns up the thermostat to a hotter setting, which is happening to the energy the heater is producing?
Choices:
increasing
decreasing
Answer: A
Background: Water becomes more dense when it is colder and when it has more salt.

Question: What happens to water when it absorbs less salt?
Choices:
lower density
Higher Density
Answer: A
Background: We also saw that adding resistors to a series circuit increases the total resistance of the circuit, causing the current to decrease.

Question: If Mona is building a new circuit and she adds more serial resistors to it, what happens to the total current in that circuit?
Choices:
increases
decreases
Answer: B
Background: Smoking reduces the amount of oxygen available for diffusion at the lungs, so less oxygen gets absorbed and blood is oxygenated to a lesser degree.

Question: More oxygen absorption means _____ oxygen in the blood.
Choices:
more
less
Answer: A
Background: When your brain senses that your body temperature is increasing, it sends messages to the blood vessels in the skin to increase in diameter.

Question: The blood vessels near the top of the skin do what when it's warm?
Choices:
enlarge
contract
Answer: A
Background: Warming up exercises increases the blood flow to the muscles and increases the heart rate.

Question: As we start running our hearts pump faster which means blood flow
Choices:
increases
decreases
Answer: A
Background: As the population increases, the food supply, or the supply of another necessary resource, may decrease.

Question: Twenty wolves recently left their pack for new territory. The smaller number of wolves in the pack means that the availability of food will be
Choices:
greater
lesser
Answer: A
Background: Acids have pH values below 7. The lower the pH value, the more strongly acidic the substance.

Question: If Mary is cleaning her pool and she lowers the pH value of the water, what happens to the acidity of the water?
Choices:
increases
decreases
Answer: A
Background: Sea level rises if an increase in seafloor spreading rate buoys up the ocean crust, causing the ocean basin to become smaller.

Question: John was looking at the ocean level data on his computer. He noticed that as the seafloor spreading rate increases, the level of the sea
Choices:
Decreases
Increases
Answer: B
Background: As blood glucose levels decrease, less insulin is produced.

Question: If Milo stops eating for awhile and his blood glucose increases, what happens to the amount of insulin he is producing?
Choices:
increases
decreases
Answer: A
Background: A given volume of a denser substance is heavier than the same volume of a less dense substance.

Question: Sarah is carrying two tubs, one is filled with rocks, the other with feathers. The tub with feathers will be lighter because it is
Choices:
more dense
less dense
Answer: B
Background: In general, the farther away from the Sun, the greater the distance from one planets orbit to the next.

Question: When we look at the solar system planets are less far apart
Choices:
closer to the sun
farther from the sun
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: If the Moon moves towards the Earth, what happens to the tidal pull of that astral body?
Choices:
it increases
it decreases
Answer: A
Background: Larger alkenes have lower boiling and melting points, so they are liquids or waxy solids at room temperature.

Question: Harry was sorting alkenes. The smallest of the bunch have _____ boiling points
Choices:
lower
higher
Answer: A
Background: Less massive objects also have less gravity than more massive objects.

Question: The most massive objects have _____ gravity than less massive objects.
Choices:
higher
lower
Answer: A
Background: In general, fossils in older rocks are less similar to modern organisms.

Question: John was comparing different fossils in his collection one day. If he were to compare characteristics of a very recent fossil in his collection to an animal alive now, what would he find?
Choices:
high similarity
low similarity
Answer: A
Background: The more curved the surface of a lens is, the more it refracts the light that passes through it.

Question: Terry had a glass lens that he made less curved over time. The lens now reflects _____ light.
Choices:
more
less
Answer: B
Background: Rougher surfaces have more friction between them than smoother surfaces.

Question: Eric rubs together tissue paper and then sandpaper. The rougher tissue paper has _____ friction than the sandpaper.
Choices:
less
more
Answer: B
Background: As more resistors are added in parallel, the total current strength increases.

Question: Jay adds more resistors in parallel to a circuit. The total current strength
Choices:
decreases
increases
Answer: B
Background: With fewer trees, the air is drier and droughts are more common.

Question: Terry replaces cut down trees in the forest. The air is now _____ dry.
Choices:
more
less
Answer: B
Background: Longer wires have more resistance than shorter wires.

Question: If a wire were to be cut in half, each half would have _____ resistance than the whole wire.
Choices:
more
less
Answer: B
Background: Breast cancer is rare in teens but becomes more common as females get older.

Question: Jolene just turned 16 years old. She is _____ likely to be diagnosed with breast cancer than her grandmother.
Choices:
more
less
Answer: B
Background: However, the melanocytes of people with darker skin produce more melanin.

Question: The darker someone's skin is the _____ melanin they have.
Choices:
less
more
Answer: B
Background: When a person smokes there are chemicals released by the tobacco that enter the lungs. Because the lungs have to work harder to remove the chemicals, the body has to work harder to get the air needed to survive.

Question: If Mona is a non-smoker, but decides to start smoking, what happens to the difficulty her lungs experience in removing chemicals from the air?
Choices:
increase
decrease
Answer: A
Background: In transipration, at warmer temperatures water molecules move faster, and the rate of evaporation from stomata is therefore much faster.

Question: Eric is observing the transpiration process. The water from the plants goes into the atmosphere _____ in lower temperatures.
Choices:
faster
slower
Answer: B
Background: If you are standing on the shore and a ship is going out to sea, the ship gets smaller as it moves further away from you.

Question: Marty watched the cruise ship sail closer and get _____.
Choices:
larger
smaller
Answer: A
Background: In a series circuit, the resistance increases as more resistors are added in series.

Question: By adding twenty more resistors to the series circuit in series, the total resistance of the circuit was
Choices:
increased
decreased
Answer: A
Background: The Earth travels faster in its elliptical orbit when it is closer to the Sun than when it is farther away.

Question: If the Earth is orbiting the Sun and it begins to move farther from it, what happens the speed the Earth is moving?
Choices:
increase
decrease
Answer: B
Background: When particles move more quickly, temperature is higher and an object feels warmer.

Question: Jan is cold, so she starts to jog in place. The faster Jan jogs, she will feel warmer
Choices:
quicker
slower
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: Marco needs to dig a well in his backyard, but the water table is very low. The energy that it will take to dig a deep well is
Choices:
great
small
Answer: A
Background: A wave caused by a disturbance with more energy has greater amplitude.

Question: A tsunami created by a lot of rocks will create what size wave?
Choices:
small
large
Answer: B
Background: Smoking reduces the amount of oxygen available for diffusion at the lungs, so less oxygen gets absorbed and blood is oxygenated to a lesser degree.

Question: Will is not smoking a cigarette anymore. This causes _____ oxygen to be available for diffusion in his lungs, so more oxygen will be absorbed into his blood.
Choices:
more
less
Answer: A
Background: The trade-off when the threads are closer together, is that more turns of the screw or bolt are needed to do the job because the distance over which the input force must be applied is greater.

Question: Compared to a drywall screw with a coarse thread, would a lag bolt of the same length with a very fine thread require
Choices:
fewer turns to drive into a hole>
more turns to drive into a hole
Answer: B
Background: The more charged the objects are, the stronger the electrostatic force between them.

Question: When a magnet is strong it has
Choices:
more force
less force
Answer: A
Background: Less photosynthesis means that plants and phytoplankton produce less food.

Question: If Mona owns a greenhouse and she decides to cover the top up to restrict sunlight, what happens to her plant's ability to make food?
Choices:
increases
decreases
Answer: B
Background: Objects with greater mass have a stronger force of gravity between them.

Question: If Mona is comparing an orange and an apple and she determines that the apple is less massive then the orange, which object has more gravity?
Choices:
orange
apple
Answer: A
Background: The elastic force increases the more the material is stretched or compressed.

Question: If Mona is playing with a rubber band and she stops stretching it out, what happens to the amount of elastic force contained in the rubber band?
Choices:
increases
decreases
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: A reactant particle that is in the arctic is likely _____ compared to one in the desert.
Choices:
faster
slower
Answer: B
Background: Fossils found at the lowest layer of rock would be the oldest, as these would have been buried for the longest time, whereas fossils found closer to the surface would be buried more recently and therefore be younger.

Question: A fossil in the lowest layer of rock would be _____ than one higher up.
Choices:
younger
older
Answer: B
Background: A thinner wire is more difficult for electrons to move through than a thicker wire.

Question: John was looking at a diagram of an electrical system. He observed that it was more difficult for electronics to move when the wire was
Choices:
Thicker
Thinner
Answer: B
Background: A thinner wire is more difficult for electrons to move through than a thicker wire.

Question: If you use a thick piece of wire then electrons move
Choices:
easier
harder
Answer: A
Background: In the larger container we will still have the same number of gas particles, but now they are filling a much larger space.

Question: If Jim has a container of hydrogen gas that is 40 liters in volume and he moves the gas to a container that is 50 liters in volume, what happens to the density of the gas?
Choices:
increases
decreases
Answer: B
Background: In bigger atoms, valence electrons are farther from the nucleus.

Question: Charles sees an atom through the microscope that is the biggest he's ever seen. The valence electrons in this atom are likely _____ the nucleus
Choices:
far from
close to
Answer: A
Background: The trade-off when the threads are closer together, is that more turns of the screw or bolt are needed to do the job because the distance over which the input force must be applied is greater.

Question: Dawn is screwing in a screw so she can hang a picture on the wall. Because the threads are really close together, the force that Dawn must apply to get the screw into the wall is
Choices:
greater
lesser
Answer: B
Background: Longer wavelength electromagnetic waves have lower frequencies, and shorter wavelength waves have higher frequencies.

Question: Shirley wants to make sure that her frequencies are low, so she will have her wavelengths for the electromagnetic waves be
Choices:
shorter
longer
Answer: B
Background: The longer the exposure, the more light that the telescope can gather to make the image.

Question: Mike needed to get a good picture in a dark room, but couldn't turn on a light. In order to get the brightest photo, Mike made the exposure
Choices:
longer
shorter
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: Erin was going to see the elephants in the jungle. If the jungle is smaller than it was 20 years ago, then what has likely happened to the population of the elephants?
Choices:
it has decreased
it has increased
Answer: A
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: When water is eroding down a river it will do more cutting if it is
Choices:
low
high
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: Eric built his telescope higher up. The interference from the atmosphere up here is
Choices:
lower
higher
Answer: A
Background: Larger telescopes can collect more light and see finer details than smaller telescopes.

Question: Mike had a large telescope for years and years. Recently, his wife purchased him a smaller one. Compared to the bigger telescope, the amount of light the new, smaller one would collect would be
Choices:
less.
more
Answer: A
Background: Water flowing over a steeper slope moves faster and causes more erosion.

Question: Kelly built a home with a gorgeous ocean view, but the hillside is prone to erosion, and each time it rains, his foundation becomes less stable. The slope is getting steeper and the water is flowing _____ causing more erosion.
Choices:
faster
slower
Answer: A
Background: As more resistors are added in series, the total resistance of the circuit increases.

Question: If we want to increase resistance in computers we should put more resistors in
Choices:
parallel
series
Answer: B
Background: For a given medium, sound waves travel more slowly at lower temperatures.

Question: If Milo is listening to the radio in his room and the room gets colder, what happens to the speed of the sound waves generated by the radio?
Choices:
increase
decrease
Answer: B
Background: A stronger acid produces a greater concentration of ions than a weaker acid.

Question: Milo is measuring acidity levels in his drink fridge. If his sprite is more acidic then his coke, which item has the greater concentration of ions?
Choices:
coke
sprite
Answer: B
Background: The bigger the waves are and the more sediment they carry, the more erosion they cause.

Question: A still river that carries little sediment will cause _____ erosion.
Choices:
less
more
Answer: A
Background: If the gas is cooled, the particles will move more slowly, because they will have less energy.

Question: When we get warm we become
Choices:
faster
slower
Answer: A
Background: Chemical weathering increases as: Temperature increases: Chemical reactions proceed more rapidly at higher temperatures.

Question: John was combining chemicals in his lab one day. If he were to increase the temperature in his lab, what would happen to the rate of chemical reactions in his experiments?
Choices:
increase
decrease
Answer: A
Background: In erosion, a slower moving stream will only carry smaller particles.

Question: A fast stream is capable of moving
Choices:
boulders
sand
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: Jim puts his water in the fridge for later. The molecules in the liquid
Choices:
speed up
slow down
Answer: B
Background: With fewer trees, the air is drier and droughts are more common.

Question: The logging company in your town is proposing they plant several thousand acres of trees. If they do so, the chances of droughts in your area will
Choices:
decrease
increase
Answer: A
Background: The more field lines that are drawn, the stronger the field.

Question: If Jim decreases the amount of field lines drawn what will happen to the strength of the field?
Choices:
decrease
increase
Answer: A
Background: Inhaling, or breathing in, increases the size of the chest, which decreases air pressure inside the lungs.

Question: Bob takes a deep breath, so that his lungs will have less painful pressure, making the size of Bob's chest
Choices:
decrease
increase
Answer: B
Background: Higher frequency waves have greater energy.

Question: Wendy increases the frequency of her radio's sound waves. These waves now have _____ energy.
Choices:
more
less
Answer: A
Background: When particles move more quickly, temperature is higher and an object feels warmer.

Question: Rita sees a particle and makes it move very slowly. The temperature of the particle
Choices:
increases
decreases
Answer: B
Background: Rougher surfaces have more friction between them than smoother surfaces.

Question: A piece of glass has _____ friction than a piece of sandpaper.
Choices:
more
less
Answer: B
Background: The longer the exposure, the more light that the telescope can gather to make the image.

Question: If Mona is an astronomer and she is looking through a telescope, what happens to the amount of light gathered by the telescope if she increases the exposure?
Choices:
increases
decreases
Answer: A
Background: The thinner the wire, the more resistance it offers.

Question: Robin is using aluminum foil to make small cylinders. A foil cylinder of diameter 10cm likely has _____ resistance than a foil cylinder of diameter 1cm.
Choices:
greater
less
Answer: B
Background: Bases have pH values above 7. The higher the pH value, the more strongly basic the substance.

Question: If Mona is filling her pool with chemicals to change the pH level of the water and she decreases the pH, what happens to the baseness of the water?
Choices:
increase
decrease
Answer: B
Background: Gravity is a pull which all matter exerts on all other matter, the more mass, the stronger the pull.

Question: During a game of tug-o-war, two teams are pulling a rope, the team that will pull the hardest has people who weigh
Choices:
more
less
Answer: A
Background: As blood glucose levels decrease, less insulin is produced.

Question: Polly was managing her diabetes. As her blood glucose levels _____, her body produces less insulin so she would need to supplement this.
Choices:
increase
decrease
Answer: B
Background: The more the baby suckles, the more prolactin is released, which causes more milk to be produced.

Question: If Mona is a nursing mother and her body begins producing more prolactin then before, what happens to the amount of milk she will produce?
Choices:
decrease
increase
Answer: B
Background: As animals grow their bones get longer and bigger, they grow more hair, and are able to take care of themselves by getting food, shelter, and water.

Question: If an animal is not growing normally, it should develop _____ hair.
Choices:
less
more
Answer: A
Background: When a person exercises regularly, and is fit, the heart undergoes certain long-term adaptations. The heart muscle gets stronger, and expels more blood with each contraction.

Question: Rich works out every day. Paul does not work out at all. Whose heart expels more blood per contraction, resulting in lower BPM?
Choices:
Rich
Paul
Answer: A
Background: If you are standing on the shore and a ship is going out to sea, the ship gets smaller as it moves further away from you.

Question: As he was standing on the beach and watching the boat, it began to drift away. As the distance grew between him and the boat, the ship got
Choices:
Smaller
Larger
Answer: A
Background: If there are more greenhouse gases in the atmosphere, more ultraviolet radiation will be trapped and the Earth will heat up.

Question: Carl is studying climate change, and notes that less ultraviolet radiation is being trapped, which means the earth will be
Choices:
cooler
warmer
Answer: A
Background: The closer objects are, the stronger the gravitational pull between them.

Question: Does a ball in space have more or less gravity on it than on earth?
Choices:
more
less
Answer: B
Background: The faster, longer, and farther the wind blows, the bigger the waves are.

Question: Dan is on a ship, and sees that the waves are getting huge! Dan can deduce that it means that the wind is blowing
Choices:
harder
softer
Answer: A
Background: Energy levels farther from the nucleus of an atom have more orbitals.

Question: The _____ orbitals in energy levels are found closest to the nucleus of an atom.
Choices:
most
less
Answer: B
Background: The more an elastic object is stretched or compressed, the greater its elastic potential energy is.

Question: What will happen to the amount of elastic potential energy in Jim's rubber band if he compresses it?
Choices:
more potential energy
less potential energy
Answer: A
Background: The more curved the surface of a lens is, the more it refracts the light that passes through it.

Question: In a science class, the professor demonstrates refraction to the class. First, the professor shows a curved lens from a binocular, and then a flat pane of glass, demonstrating that
Choices:
the curved lens refracts less light
the flat pane refracts less light.
Answer: B
Background: Most nutrients are washed into ocean water from land. Therefore, water closer to shore tends to have more nutrients.

Question: The closer that water gets to the shore the _____ nutrients there are.
Choices:
more
fewer
Answer: A
Background: As animals grow their bones get longer and bigger, they grow more hair, and are able to take care of themselves by getting food, shelter, and water.

Question: As Peter's dog got smaller, the dog's bones became
Choices:
larger
smaller
Answer: B
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: If Mona fills up a cup with water and places that water into the oven, what happens to the density of the water as it heats up?
Choices:
increases
decreases
Answer: B
Background: The closer the charged objects are, the stronger the electrostatic force.

Question: Will was pulling some magnets apart. When is the electrostatic force the highest?
Choices:
when the magnets are close
when the magnets are far
Answer: A
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 Earth and Venus is _____ than the force of gravity between Earth and Venus.
Choices:
greater
lesser
Answer: B
Background: However, the melanocytes of people with darker skin produce more melanin.

Question: John was observing a range of patients skin under a microscope. He noticed that the more melanocytes the skin had, the production of melanin was
Choices:
higher
lower
Answer: A
Background: Older rocks are at the bottom and younger rocks are at the top.

Question: Ian is digging in his garden, and admires the shiny pebbles sitting in the yard, as he digs a hole and finds more rocks, he knows that the first ones he found are
Choices:
younger
older
Answer: A
Background: Water near shore generally has more dissolved nutrients than water farther from shore.

Question: A scientist, one mile away from shore, would expect to find _____ dissolved nutrients in the water than near the shore.
Choices:
less
more
Answer: A
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 quickly, and that they seem to have a lot of energy. These particles are likely at a temperature that is
Choices:
higher
lower
Answer: A
Background: Aerobic exercise increases the size and strength of muscles in the heart and helps all your muscles develop greater endurance.

Question: If one trains aerobic exercises, their heart muscles will become
Choices:
stronger
weaker
Answer: A
Background: The farther the sound waves travel away from the source, the more spread out their energy becomes.

Question: Would the sound from a loud speaker transmit more energy to the eardrum of a member of the audience if they were standing
Choices:
directly in front of the speaker
two miles away?
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: A model created with less computing power should have a _____ chance of being accurate.
Choices:
lower
higher
Answer: A
Background: To reduce friction, oil is added to the engine.

Question: Jeff should add _____ to his engine to decrease the friction in its processes.
Choices:
oil
gas
Answer: B
Background: Longer length resistors will offer more resistance than shorter resistors.

Question: Olivia has a miniature resistor and a normal sized one. Which resistor offers less resistance?
Choices:
the miniature resistor
the normal resistor
Answer: A
Background: At higher temperatures, particles of reactants have more energy, so they move faster.

Question: Tom lowered the temperature of a reactant in a lab. The particles in the reactant now have _____ energy.
Choices:
less
more
Answer: A
Background: Shorter wavelengths (higher frequencies) correspond to higher energies and thus hotter star temperatures.

Question: Sue sees a star with a high frequency. Erin sees a star with a low frequency. The cooler star belongs to
Choices:
Sue
Erin
Answer: B
Background: Smaller sediments are dropped as the slope becomes less steep.

Question: If Milo wants to encourage larger pieces of sediment to drop on his lawn, what should he do to the slope of his lawn?
Choices:
increase it
decrease it
Answer: A
Background: Natural selection is the process by which living things with beneficial traits produce more offspring, so their traits become more common over time.

Question: Living things with great traits should produce _____ offspring than living things with better traits.
Choices:
more
less
Answer: A
Background: Air in the troposphere is warmer closer to Earths surface.

Question: Micah is entering the atmosphere, and is approaching the Earth's surface. As he's passing through the troposphere, the air is going to get
Choices:
warmer
colder
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: If Jim climbs to the top of a mountain and takes the temperature after taking the temperature at the bottom of the mountain, which area will he get a lower reading at?
Choices:
top of the mountain
bottom of the mountain
Answer: A
Background: Exercising muscles increases their size, and bigger muscles have greater strength.

Question: When someone works out a lot they are _____ than those that never exercise
Choices:
stronger
weaker
Answer: A
Background: If salt is added to a volume of water, there are more molecules in the same volume, so the water is denser.

Question: If Milo wants to make his water saltier and begins removing salt to the glass, what happens to the density of the glass of water?
Choices:
decreases
increases
Answer: A
Background: For a given medium, sound has a slower speed at lower temperatures.

Question: Greta yells across the canyon in the cool morning and again in the hot afternoon. The sound likely traveled _____ in the morning.
Choices:
slower
not as slow
Answer: B
Background: When a person exercises regularly, and is fit, the heart undergoes certain long-term adaptations. The heart muscle gets stronger, and expels more blood with each contraction.

Question: If Ben exercises daily, and Anna exercises only weekly, who has a weaker heart?
Choices:
Ben
Anna
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: Jeff added more and more processors to the supercomputer. The supercomputer will now likely be _____ powerful.
Choices:
more
less
Answer: A
Background: Solar power is expensive, but as demand increases technology improves and costs decrease.

Question: If demand for solar power were increase, the power would become _____ expensive.
Choices:
less
more
Answer: A
Background: As you go farther from the nucleus of an atom, the electron levels have more and more energy.

Question: Eric pushes an electron closer to the nucleus of an atom. The electron _____ energy.
Choices:
loses
gains
Answer: B
Background: Shorter wavelengths (higher frequencies) correspond to higher energies and thus hotter star temperatures.

Question: Would a star that is significantly cooler than the sun, which is outputting blue light which is higher in frequency that the yellow light of the Sun, be
Choices:
hotter
colder?
Answer: B
Background: Breast cancer is rare in teens. It becomes more common as women get older.

Question: Sue is celebrating her 16th birthday. She likely has a _____ chance of breast cancer than when she turns 60.
Choices:
greater
lesser
Answer: B
Background: The farther the sound waves travel away from the source, the more spread out their energy becomes.

Question: If Milo is listening to the radio and he moves to the far end of the room, what happens to the sound waves entering his ear?
Choices:
they spread out less
they spread out more
Answer: B
Background: During inhalation, because the chest volume is larger, the air pressure inside the lungs is lower than the air pressure outside.

Question: A person takes a deep breath and wants to know if the air outside their lungs is stronger than the air outside. The air in their chest, when they have a large chest, will be, compared to outside the body,
Choices:
higher
lower
Answer: B
Background: In electromagnetic waves with higher frequencies, photons have more energy.

Question: Will analyzes the photon energy in an electromagnetic wave with a high frequency. Bill analyzes the photon energy in an electromagnetic wave with a low frequency. _____'s wave has less photon energy.
Choices:
Bill
Will
Answer: A
Background: Decreasing air temperature increases atmospheric pressure.

Question: Rich lives in Chicago, Illinois while Rachel lives in Sydney, Australia. Who likely experiences more atmospheric pressure in June?
Choices:
Rich
Rachel
Answer: B
Background: The more rope segments on a pully that are helping to do the lifting work, the less force that is needed for the job.

Question: Dan is pulling his down a hill, and wants to pull it with as much force as possible. In order to do this effectively, Dan will need to use how many rope segments
Choices:
less
more
Answer: A
Background: The farther the sound waves travel away from the source, the more spread out their energy becomes.

Question: A sound wave, very far away from its source, is spread out _____ than near its origin.
Choices:
more
less
Answer: A
Background: Objects with greater mass have greater inertia.

Question: Hayley was studying the relationship between mass and inertia in her science class. Her teacher gave her the example of an elephant and a puppy. The elephant has a greater mass than the puppy, so the elephant would have _____ inertia.
Choices:
greater
less
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 bricks a box of feathers would be
Choices:
lighter
heavier
Answer: A
Background: Water becomes more dense when it is colder and when it has more salt.

Question: When water freezes into ice it becomes
Choices:
less dense.
more dense
Answer: B
Background: Older age, male gender, and a family history of cardiovascular disease all increase the risk of developing cardiovascular diseases and cant be controlled.

Question: Clark is 55. Morgan is 25. A scientist is researching which of these two men is more likely to develop cardiovascular disease. If their ages is the only piece of info that the scientist has, then he would say _____ is more at risk for cardiovascular disease.
Choices:
Clark
Morgan
Answer: A
Background: Because richer nations use more fossil fuels, they also cause more air pollution and global warming than poorer nations do.

Question: Amy is from the Hawaii, where she used very little fossil fuels. Andy is from a poor country where they use lots of fossil fuels. The person who's country will contribute more to air pollution is
Choices:
Amy's
Andy's
Answer: B
Background: So the higher an object is above a surface, the more potential energy it has.

Question: Dane is dropping bouncy balls out of windows. He drops a green ball out of the first story window, then a red ball out of the second story window. The ball with the most potential energy is the
Choices:
red ball
green ball
Answer: A
Background: So more water is displaced by a bigger body than a smaller one.

Question: Both Milo and Jerry jump into a pool. Milo is larger then Jerry. Which person will displace more water when they jump in?
Choices:
Jerry
Milo
Answer: B
Background: The smaller a population is, the more allele frequencies may drift.

Question: Ford lives in a town with 6 thousand people. Wong lives in a town with 1 million people. Which population, if contained entirely, would experience more drifting allele frequencies?
Choices:
Ford
Wong
Answer: B
Background: The more curved the surface of a lens is, the more it refracts the light that passes through it.

Question: Katie wants to get light to turn to rainbow colors by using a lens to filter the light through. In order to get the least colors, Katie will use a lens that is
Choices:
flat
curved
Answer: A
Background: As the amount of water increases, the melting point of rock decreases.

Question: Theresa increased the amount of water in her pool. Rock would likely melt
Choices:
faster
slower
Answer: A
Background: Bigger stars produce more energy, so their surfaces are hotter.

Question: Would a small star be
Choices:
hotter
colder
Answer: B
Background: More people also means more clearing of land for agriculture and development.

Question: When people move to an area what happens to the land?
Choices:
cleared
kept the same
Answer: A
Background: During inhalation, because the chest volume is larger, the air pressure inside the lungs is lower than the air pressure outside.

Question: Compared to a balloon that has the size of a head a balloon the size of a fist will have
Choices:
more pressure
less pressure
Answer: A
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 decreases, the weathering effect
Choices:
Decreases
Increases
Answer: A
Background: The rocket goes upwards because the hot gases shoot downwards out of the nozzle. The faster the gases go downwards, the faster the rocket goes upwards.

Question: If John decreases the rate at which gas exits the bottom of his rocket, what will happen to the upward momentum of the rocket? It will
Choices:
increase
decrease
Answer: B
Background: However, the energy is diluted as an electromagnetic wave travels farther from its source because it spreads out over an ever-larger area.

Question: Something with a lot of energy travels
Choices:
short distances
long distances
Answer: B
Background: Temperature affects the rate at which photosynthesis, cellular respiration and decomposition take place. The rate of reaction increases with increasing temperature and decreases at lower temperatures.

Question: If the temperature in the environment increases, what will happen to the rate of cellular respiration?
Choices:
increases
decreases
Answer: A
Background: The bigger the waves are and the more sediment they carry, the more erosion they cause.

Question: A fast-moving river that carries more sediment will cause _____ erosion.
Choices:
less
more
Answer: B
Background: Lower temperature and higher salinity yield the densest water.

Question: Will added salt to the pool water. The water is now
Choices:
less dense
more dense
Answer: B
Background: We also saw that adding resistors to a series circuit increases the total resistance of the circuit, causing the current to decrease.

Question: Jim loves to build circuits. One day he builds a circuit that has more resistors then any other circuit he has built. Since the circuit has more resistors the amount of current in the circuit is
Choices:
reduced
increased
Answer: A
Background: The particles in matter are always moving. The more energy they have, the faster they move.

Question: If particles in matter move faster, they likely have _____ energy.
Choices:
more
less
Answer: A