allenai/quartz huggingface dataset:
Background: The higher up a food chain that humans eat, the greater the levels of toxic metals they take in.

Question: Mike is studying what humans eat. Bears are higher up the food chain than mosquitoes. Therefore, if humans were to eat bears, they would likely be taking in _____ levels of toxic metals.
Choices:
less
more
Answer: B
Background: To reduce friction, oil is added to the engine.

Question: If Milo's engine is running hot, how will adding oil affect friction?
Choices:
increase
reduce
Answer: B
Background: Thicker resistors offer less resistance than thinner resistors.

Question: When Dan got a thick resistor, he knew that its resistance would be
Choices:
more
less
Answer: B
Background: The planets further from the Sun will have bigger orbits, and therefore take longer to revolve around the Sun.

Question: Earth has a much smaller orbit around the Sun than Jupiter does. This means that which planet takes less time to go around the Sun?
Choices:
Jupiter
Earth
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: Scuffy was a puppy, and now he is a dog. Now that Scruffy is bigger, longer, and furrier than before, Scrufffy can take care of himself
Choices:
better
worse
Answer: A
Background: Therefore, increasing the surface area of solid reactants increases the reaction rate.

Question: If you keep something whole before putting it into water it will dissolve
Choices:
slower
faster
Answer: A
Background: In general, the farther away from the Sun, the greater the distance from one planets orbit to the next.

Question: NASA has sent an unmanned probe to survey a distant solar system with four planets. Planet Zorb is farthest from the sun of this solar system, Planet Krakatoa is second farthest, Planet Beanbag is third, and Krypton is the closest. The probe visits the planets in order, first Zorb, then Krakatoa, then Beanbag and finally Krypton. Did the probe have to fly farther in its trip from
Choices:
Zorb to Krakatoa or
from Beanbag to Krypton?
Answer: A
Background: The more acidic a solution is, the closer its pH value will be to 0

Question: Erin is trying to get her solution to have a pH as far from zero as possible. The best way for Erin to do that is to have the acidity of the solution
Choices:
decrease
increase
Answer: A
Background: Because richer nations use more fossil fuels, they also cause more air pollution and global warming than poorer nations do.

Question: Mona lives in a nation that doesn't use a lot of fossil fuels. What would happen to her countries levels of air pollution if they were to increase their usage?
Choices:
increase
decrease
Answer: A
Background: More pollutants mean poorer air quality.

Question: When a river gets emptied of a lot of waste chemicals it becomes
Choices:
cleaner
dirtier
Answer: A
Background: Because these isotopes decay more slowly, they can be used to date much older specimens.

Question: For dating the age of a fossil, and compared to the isotope Carbon 14 with its 5730 year half-life, would Francium with a 22 minute half-life be a
Choices:
less useful isotope?
more useful isotope
Answer: A
Background: As more resistors are added in parallel, the total current strength increases.

Question: Mike wants the current strength to be weaker, so mike will do this with the number of resistors
Choices:
decrease
increase
Answer: A
Background: In bigger atoms, valence electrons are farther from the nucleus.

Question: If valence electrons are close to an atom's nucleus, the atom is likely
Choices:
bigger
smaller
Answer: B
Background: Larger alkenes have lower boiling and melting points.

Question: The bigger the alkene the _____ boiling and melting points.
Choices:
lower
higher
Answer: A
Background: The gravitational force between two objects decreases as the objects move further apart.

Question: Tinna held two magnets together and felt _____ force.
Choices:
more
less
Answer: A
Background: Warm air is less dense than cool air, so it rises higher in the troposphere.

Question: Warm air is able to fill more space than cold air because it is
Choices:
more dense
less dense
Answer: B
Background: The gravitational force between two objects decreases as the objects move further apart.

Question: Terry has two balls and pulls them together to each other. The gravitational force between the balls
Choices:
increases
decreases
Answer: A
Background: The hotter a resistor becomes the more resistance it has.

Question: A warming resistor will _____ in resistance.
Choices:
increase
decrease
Answer: A
Background: Objects with greater mass have a stronger force of gravity.

Question: The moon has a _____ force of gravity than the sun.
Choices:
weaker
stronger
Answer: A
Background: Lower temperature and higher salinity yield the densest water.

Question: Will removed salt from the pool water. The water is now
Choices:
less dense
more dense
Answer: A
Background: The higher the crests of a wave are, the greater the amplitude.

Question: If Jimbo is surfing and the waves begin to crest higher, what happens to amplitude of those waves?
Choices:
increases
decreases
Answer: A
Background: If we have two materials with the same volume, the material with a higher mass will be more dense.

Question: If there are two equal-volume objects, the densest object will be the one with _____ mass.
Choices:
higher
lower
Answer: A
Background: The planets further from the Sun will have bigger orbits, and therefore take longer to revolve around the Sun.

Question: If Jupiter has a bigger orbit then Mercury, which planet will take a shorter time to revolve around the Sun?
Choices:
Jupiter
Mercury
Answer: B
Background: To reduce friction, oil is added to the engine.

Question: If Milo's bike chain is not moving well and he adds some oil to it, what will happen to the levels of friction the chain experiences?
Choices:
increase
decrease
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: Ron watches a wave for 10 seconds and notices 10 crests. He watches another wave for 10 seconds and sees 5 crests. Which wave has a lesser frequency?
Choices:
10 crests
5 crests
Answer: B
Background: Compared with a less powerful device, a more powerful device can either do more work in the same time or do the same work in less time.

Question: If Jim downgrades his computer to a less powerful model, what happens to the amount of work it can perform?
Choices:
it can perform more work then before
it can perform less work then before
Answer: B
Background: Chemical weathering increases as: Temperature increases: Chemical reactions proceed more rapidly at higher temperatures.

Question: The temperature has been rising in a certain part of the world. The temperature change leads to _____ chemical weathering.
Choices:
less
more
Answer: B
Background: More recently, the death rate has fallen because of the availability of more food and medical advances.

Question: When the villagers are living longer, the food source is likely
Choices:
great
small
Answer: A
Background: More people also means more clearing of land for agriculture and development.

Question: Carla takes a look at the populations of two countries. She finds Canada had about 37 million people in 2017. The United States had a population of 325 million in that same year. Therefore, Canada likely clears _____ land for agriculture and development than the United States.
Choices:
more
less
Answer: B
Background: The hotter a main sequence star is, the brighter it is.

Question: A main sequence star that is not bright is not among the _____ stars
Choices:
hottest
coolest
Answer: A
Background: The higher the pH value is, the stronger the base.

Question: If Mona is adjusting the pH levels of her fish tank and she makes the pH higher, what happens to the baseness of the water?
Choices:
higher
lower
Answer: A
Background: The closer objects are to each other, the stronger the gravitational force between them.

Question: Gary had two rocks and brought them closer together. The gravitational rock between the rocks is now _____ strong.
Choices:
more
less
Answer: A
Background: Muscles that are exercised are bigger and stronger than muscles that are not exercised.

Question: Jeff is stopping exercising his muscles at home. Over time his muscles will grow
Choices:
bigger
smaller
Answer: B
Background: Its harder to overcome friction between heavier objects and the floor than it is between lighter objects and the floor.

Question: If you tried to push a sack of unpopped popcorn or a sack of popped popcorn, both of the same volume, would it be easier to push the
Choices:
sack of unpopped popcorn
sack of popped popcorn?
Answer: B
Background: More UV rays increase skin cancer rates.

Question: If you spend a lot of time out in the sun then getting skin cancer is
Choices:
less likely
more likely
Answer: B
Background: The glaciers on Earth are getting smaller and smaller as Earths temperature rises.

Question: If Earth's average temperature were to rise, Earth's glaciers should
Choices:
decrease
increase
Answer: A
Background: Bigger waves have more energy.

Question: Milo is surfing at the beach on his day off. He notices that the waves are getting smaller and smaller. What is happening to the energy those waves are producing? It's
Choices:
decreasing
increasing
Answer: A
Background: The elastic force increases the more the material is stretched or compressed.

Question: If a product is stretched, elastic force will
Choices:
increase
decrease
Answer: A
Background: As you go farther from the nucleus of an atom, the electron levels have more and more energy.

Question: Mary was performing experiments with atoms in her lab. She was measuring energy levels at various distances from an atom's nucleus. Would measurements taken farther from a nucleus result in
Choices:
lower energy levels?
greater energy levels or
Answer: A
Background: Pigments in the skin act like a filter that can prevent the skin from making vitamin D. As a result, people with darker skin need more time in the sun than people with lighter skin to make the same amount of vitamin D.

Question: African Americans have darker skin than other Americans. Researchers were not surprised to discover therefore, that vitamin D insufficiency among African Americans is _____ than among other Americans?
Choices:
more prevalent
less prevalent
Answer: A
Background: As the liquid particles lose energy, their movement slows down even more. As their movements become slower and slower, the attractive forces between become stronger.

Question: Quent increases the energy of a liquid. He notices that the particles in the liquid
Choices:
slow down
speed up
Answer: B
Background: Lower rock layers were laid down earlier, so they are assumed to contain older fossils.

Question: If Mona is excavating an archeological site and she discovers some fossils near the surface then compares them to fossils she found deeper down, which fossils will be younger?
Choices:
near the surface
deeper down
Answer: A
Background: The pupil automatically gets bigger or smaller to let more or less light in as needed.

Question: Jim looked at his cat's eyes on a bright sunny day, then he looked at the eyes when the cat was in very low light inside the house. In the high light condition, the cat's pupils well be
Choices:
smaller.
larger
Answer: A
Background: Because richer nations use more fossil fuels, they also cause more air pollution and global warming than poorer nations do.

Question: If Jim's country increases use of fossil fuels, what will happen to the amount of pollution it produces?
Choices:
increase
decrease
Answer: A
Background: The closer the charged objects are, the stronger the electrostatic force.

Question: If we have a static charged balloon and bring it close to your head _____ hairs will stand up
Choices:
less
more
Answer: B
Background: Solar power is expensive, but as demand increases technology improves and costs decrease.

Question: Mona lives in a city that doesn't know much about solar power. As the citizens become more aware of solar and the benefits it offers the demand for solar power rises. What happens to the cost of the technology as the demand increases?
Choices:
increase
decrease
Answer: B
Background: The full box is harder to move because it has greater mass and therefore greater inertia.

Question: Increasing the mass of an object causes its inertia to
Choices:
increase
decrease
Answer: A
Background: Objects with greater mass have a stronger force of gravity between them.

Question: Eric lost weight after the diet. His force of gravity has now slightly
Choices:
decreased
increased
Answer: A
Background: As you go farther from the nucleus of an atom, the electron levels have more and more energy.

Question: The electrons that rotate in the inner edges of an atom have
Choices:
more energy
less energy
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 larger while inhaling air that the pressure in the patient's lungs got
Choices:
higher
lower
Answer: B
Background: With a higher concentration of hydrogen ions, a solution is more acidic but has a lower pH.

Question: If you found something with many hydrogen ions it would be
Choices:
basic
acidic
Answer: B
Background: The more field lines that are drawn, the stronger the field.

Question: If there are few lines that are magnetic then they are
Choices:
weak
strong
Answer: A
Background: More recently, the death rate has fallen because of the availability of more food and medical advances.

Question: When the villagers are dying sooner, the food source is likely
Choices:
great
small
Answer: B
Background: So the higher an object is above a surface, the more potential energy it has.

Question: A ball that is on the ground will have _____ potential energy than a ball on the top of the empire state building about to be dropped off .
Choices:
more
less
Answer: B
Background: With higher frequencies, the microwaves also have more energy.

Question: If Milo is adjusting the strength of his microwave in the kitchen and he sets it to a higher frequency, does the energy output of the microwave
Choices:
increase
decrease
Answer: A
Background: Because these isotopes decay more slowly, they can be used to date much older specimens.

Question: If Milo is measuring isotopes and he notices that they seem to decay faster then average, what does that mean about the age of the specimen he is examining?
Choices:
younger
older
Answer: A
Background: The more current, the stronger the electromagnet.

Question: John started measuring the current, and notices that as the current got weaker the electromagnet became
Choices:
Weaker
Stronger
Answer: A
Background: Objects that are closer together have a stronger force of gravity between them.

Question: As two asteroids drift further apart, does the gravitational force they exert on each other
Choices:
increase
decrease?
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: If Mary increases the resistance of her electrical circuit, what will happen to the current in that circuit?
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: John was playing with alkanes in his lab. If he increased the amount of carbon atoms in an alkane, what would happen to the boiling point of that alkane?
Choices:
decrease?
increase
Answer: B
Background: Increasing air temperature decreases atmospheric pressure.

Question: Mona is flying in a hot air balloon. As she floats lower in the air the air temperature rises. What will happen to the air pressure?
Choices:
increase
decrease
Answer: B
Background: Water becomes more dense when it is colder and when it has more salt.

Question: Water found on Earth's hot regions is _____ dense that water found on Earth's cold regions.
Choices:
more
less
Answer: B
Background: Objects with greater mass have greater inertia.

Question: When something is very heavy what does it need to move?
Choices:
more inertia
less inertia
Answer: A
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 the amount of chemicals inside of Jim's lungs increases, what will happen to the amount of air his lungs can process?
Choices:
increase
decrease
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: As the air becomes wetter, transpiration of a leaf will
Choices:
increase
decrease
Answer: B
Background: The glaciers on Earth are getting smaller and smaller as Earths temperature rises.

Question: Eric noticed a glacier outside his boat expanding over time. The Earth's temperature is likely
Choices:
decreasing
increasing
Answer: A
Background: Lighter, more streamlined vehicles need less energy.

Question: Does it take more or less energy to power a light vehicle?
Choices:
more
less
Answer: B
Background: Less massive objects also have less gravity than more massive objects.

Question: Which of these items has more gravitational strength?
Choices:
the moon
earth
Answer: B
Background: Low food supply or a lack of space can lower birth rates, increase death rates, or lead to emigration.

Question: Mona lives in a country with no food available. If a natural disaster strikes and the food supply is cut off, what will happen to the birth rate in her country?
Choices:
increase
decrease
Answer: A
Background: More advanced farming practices allowed a single farmer to grow food for many more people.

Question: If Milo is a farmer and he wants to increase the amount of bell peppers he grows, what should he do to advance his farming practices?
Choices:
increase them
decrease them
Answer: A
Background: The more energy the particles in matter have, the faster and more strongly they vibrate.

Question: Don wants to make sure that his particles will move faster, so he will make sure the energy they have is
Choices:
more
less
Answer: A
Background: The closer to pH 14, the more strongly basic the solution.

Question: John was working on a chemistry project. He found that the further from ph 14 the substance was, the substance's basicness became
Choices:
Less
Greater
Answer: A
Background: The faster the clicks of a Geiger counter occur, the higher the level of radiation.

Question: If a Geiger counter is silent in an area, there is _____ reason to worry about radiation.
Choices:
little
much
Answer: A
Background: The older a person is, the greater their chance of developing a cardiovascular disease.

Question: What happens to John's risk of contracting a disease when he is younger?
Choices:
it decreases
it increase
Answer: A
Background: For a given medium such as air, sound has a slower speed at lower temperatures.

Question: Ivan yells across a canyon in the morning when it is cold and again later in the afternoon when it is hot. During which time did his voice travel the slowest?
Choices:
morning
afternoon
Answer: A
Background: As the amount of water increases, the melting point of rock decreases.

Question: Theresa decreased the amount of water in her pool. Rock would likely melt
Choices:
faster
slower
Answer: B
Background: The greater the objects mass, the greater the force of gravitational attraction.

Question: Will weighed himself on a scale. He weighs more than last year. His force of gravitational attraction
Choices:
increased
decreased
Answer: A
Background: When we add resistors in parallel to each other the total resistance decreases and the current increases.

Question: Eric removes resistors in parallel to a circuit. The total current
Choices:
increases
decreases
Answer: B
Background: The louder the sounds are, the less exposure is needed to cause hearing loss.

Question: Jim loves to listen to the radio. If he turns the volume low the amount of time he can listen to the music before experiencing hearing loss
Choices:
increases
decreases
Answer: A
Background: Increasing the number of resistors in a series circuit increases the overall resistance of the circuit.

Question: Mike was wiring up a new circuit to test it out. He observed that the more resistors he added to the circuit. the overall resistance level
Choices:
Increased
Decreased
Answer: A
Background: More water allows more chemical reactions.

Question: If Mona is mixing some chemicals in a beaker for her science project and she adds more water to the mixture, what will happen to the amount of chemical reactions that can take place inside the beaker?
Choices:
it will decrease
it will increase
Answer: B
Background: More pollutants mean poorer air quality.

Question: If Mona lives in a city that begins producing a greater amount of pollutants, what happens to the air quality in that city?
Choices:
increases
decreases
Answer: B
Background: At higher elevations, there is less air to press on a given area.

Question: Dane was on a mountaintop and struggled to breathe, so he rectified it by getting to an elevation that was
Choices:
higher
lower
Answer: B
Background: On a hot day, an endotherm may give off more heat by increasing blood flow to the surface of the body.

Question: Eric went outside in the winter. He is _____ likely to give off heat than if it was summer.
Choices:
more
less
Answer: B
Background: The more tightly packed the particles inside the material are, the more dense we say they are.

Question: If Mona is packing coffee into a tin and she continues to add more coffee, what happens to the density of the coffee inside the tin?
Choices:
increases
decreases
Answer: A
Background: As greenhouse gases increase, changes will be more extreme.

Question: If greenhouse gases were greatly decreased, we can expect a _____ chance of extreme changes.
Choices:
higher
lower
Answer: B
Background: In bigger atoms, valence electrons are farther from the nucleus.

Question: In small atoms valence electrons are usually
Choices:
closer
farther
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 more slowly, they likely have _____ energy.
Choices:
more
less
Answer: B
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: Lana is noting that the wind lately has been very weak. Lana can now tell that the air pressures over the Earth's surface have had differences that are
Choices:
greater
lesser
Answer: B
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 soda was _____ acidic.
Choices:
less
more
Answer: B
Background: Sea level rises if an increase in seafloor spreading rate buoys up the ocean crust, causing the ocean basin to become smaller.

Question: If the ocean basin were to increase, the sea level would
Choices:
rise
lower
Answer: B
Background: A: As the car approaches the radar gun, the reflected microwaves get bunched up in front of the car. Therefore, the waves the receiver detects have a higher frequency than they would if they were being reflected from a stationary object. The faster the car is moving, the greater the increase in the frequency of the waves.

Question: When waves in the ocean go slow there will be
Choices:
less
more
Answer: A
Background: The closer together the particles are, the greater the amplitude of the wave.

Question: Theo moved close to Gary. The amplitude of the light bouncing off of them likely
Choices:
decreases
increases
Answer: B
Background: The farther the object is stretched or compressed, the greater its elastic potential energy is.

Question: Donna stretches a rubber band further and further. The elastic potential energy of the rubber band will be
Choices:
greater
less
Answer: A
Background: Air pressure is less at higher elevations.

Question: Marcus is climbing a mountain, and notices that it is more difficult to breathe than it was before. This is likely because Marcus is at a
Choices:
lower elevation
higher elevation
Answer: B
Background: Thicker wires offer less resistance.

Question: If Mona is building a new electrical system and she installs thinner wires then were previously there, what can she expect to happen to the resistance of the system?
Choices:
increase
decrease
Answer: A
Background: Objects with greater mass have a stronger force of gravity between them.

Question: Eric gained weight after the buffet. His force of gravity has now slightly
Choices:
decreased
increased
Answer: B
Background: As the distance between the objects increases the magnetic force of attraction decreases.

Question: When you hold two magnets far away what is the force between them?
Choices:
Strong
Weak
Answer: B
Background: The higher up a food chain that humans eat, the greater the levels of toxic metals they take in.

Question: A human who eats an animal that is low on the food chain should take in _____ toxic metals.
Choices:
more
less
Answer: B
Background: However, the melanocytes of people with darker skin produce more melanin.

Question: Jim's skin was noticeably lighter than his friend Matt's skin. This means that _____ produces more melanin.
Choices:
Jim
Matt
Answer: B
Background: An increase in predators, the emergence of a new disease, or the loss of habitat are just three possible problems that will decrease a population.

Question: Lizzie visited a village where an illness wiped many people out. The population got
Choices:
larger
smaller
Answer: B
Background: Water density increases as salinity and pressure increase, or as temperature decreases.

Question: Quenton adds salt to his spaghetti water. The water becomes _____ dense.
Choices:
more
less
Answer: A
Background: The hotter a main sequence star is, the brighter it is.

Question: Stars that are colder are also
Choices:
dimmer
brighter
Answer: A
Background: Exercising muscles increases their size, and bigger muscles have greater strength.

Question: If Jim starts exercising his muscles, would the strength of them
Choices:
increase
decrease
Answer: A
Background: As blood glucose levels decrease, less insulin is produced.

Question: John wanted to lose weight so he skipped his normal routine of eating a sugary donut in the morning. As a result, he felt dizzy as his blood glucose level dropped. Did the amount of insulin in his blood likely
Choices:
increase
decrease
Answer: B
Background: The more similar the DNA molecules of different species are, the closer the relationship is likely to be.

Question: If Mona is comparing two species and she notices that their DNA molecules are less similar, what does that tell her about the species relationship?
Choices:
distant relationship
close relationship
Answer: A
Background: The voice becomes deeper as the larynx in the throat grows larger.

Question: Adam had a large larynx as a child, but after his larynx shrunk for some reason, his voice got
Choices:
higher
deeper
Answer: A
Background: Warmer molecules vibrate faster than cooler ones.

Question: As molecules start moving faster they get
Choices:
warmer
colder
Answer: A
Background: A: The more carbon atoms there are, the greater the number of possible arrangements of carbon atoms.

Question: Eric removed carbon atoms to the solution. The number of possible arrangements of carbon atoms
Choices:
increases
decreases
Answer: B
Background: If we increase the resistance in a series circuit, by adding more resistors, then the total current decreases.

Question: Mona is an electrical engineer designing a new circuit. If she decreases the total number of resistors in her new circuit, what happens to the total current of the circuit?
Choices:
increase
decrease
Answer: A
Background: The louder the sounds are, the less exposure is needed to cause hearing loss.

Question: If Jim increases the level of sound coming from his speakers it means that the time it would take for him to experience hearing loss would
Choices:
increase
decrease
Answer: B
Background: The greater the mass of the objects, the stronger the gravitational pull between them.

Question: Two planets with very large masses will have a _____ gravitational pull between them than two planets with small masses.
Choices:
stronger
weaker
Answer: A
Background: So the higher an object is above a surface, the more potential energy it has.

Question: Will drops a ball from 100 feet at the same time that Tony drops a ball from 50 feet. Whose ball has more potential energy?
Choices:
Will's
Tony's
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 you spend a lot of time working out your muscles will be
Choices:
smaller
larger
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: When it becomes more humid outside people are _____ to sweat.
Choices:
more likely
less likely
Answer: A
Background: In the mesosphere, temperature decreases as altitude increases.

Question: Milo is flying a rocket in the mesosphere. If he decreases his altitude, what happens to the temperature?
Choices:
increases
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 largest of the bunch have _____ boiling points
Choices:
lower
higher
Answer: B
Background: As you go farther from the nucleus of an atom, the electron levels have more and more energy.

Question: Mary was performing experiments with atoms in her lab. She was measuring energy levels at various distances from an atom's nucleus. Would measurements taken closer to a nucleus result in
Choices:
lower energy levels?
greater energy levels or
Answer: B
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 lower gravitational force
Choices:
earth
mars
Answer: B
Background: The closer objects are to each other, the stronger the gravitational force between them.

Question: Gary had two rocks and pulled them further apart. The gravitational force between the rocks is now _____ strong.
Choices:
more
less
Answer: B
Background: The pupil automatically gets bigger or smaller to let more or less light in as needed.

Question: Will's pupils grew larger as the night grew darker. This happens to let _____ light in.
Choices:
less
more
Answer: B
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 faster in
Choices:
water
oxygen.
Answer: B
Background: So more water is displaced by a bigger body than a smaller one.

Question: A large object displaces _____ water than a smaller one.
Choices:
more
less
Answer: A
Background: Thicker wires offer less resistance.

Question: A large wire can carry current a long ways because it has _____ resistance
Choices:
less
more
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 keeps the empty fuel containers on board so the ship can fly
Choices:
higher
lower
Answer: B
Background: Higher frequency waves have greater energy.

Question: A wave with a low frequency has _____ energy than a wave with a high frequency.
Choices:
more
less
Answer: B
Background: Because these isotopes decay more slowly, they can be used to date much older specimens.

Question: Ron is trying to figure out how old some isotopes are. The isotopes are decaying very quickly, so they are likely specimens that are
Choices:
older
younger
Answer: B
Background: To reduce friction, oil is added to the engine.

Question: When two pieces of metal are rubbing together and oil is added between them the friction
Choices:
decreases
increases
Answer: A
Background: Gravity is a pull which all matter exerts on all other matter, the more mass, the stronger the pull.

Question: A satellite was sent to orbit and monitor a small planet but instead it ended up being pulled into the orbit of a nearby large planet. It was concluded that this happened because the gravitational pull of the larger planet was
Choices:
stronger
weaker
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: Jimbo heated a pot of water on his stove. What happens to the amount of oxygen contained in the water as the temperature increases?
Choices:
increases
decreases
Answer: B
Background: The more current, the stronger the electromagnet.

Question: Milo is playing with his electromagnet and he decides to increase the current supplied to it. What will happen to the strength of the electromagnet?
Choices:
increase
decrease
Answer: A
Background: A stronger acid produces a greater concentration of ions than a weaker acid.

Question: If you added more citric acid to orange juice the acid levels would
Choices:
decrease
increase
Answer: B
Background: The smaller its mass is, the greater its acceleration for a given amount of force.

Question: Will weighs 180 pounds while Nat weights 120 pounds, who would accelerate less after the same force is applied?
Choices:
Will
Nat
Answer: A
Background: Air in the troposphere is warmer closer to Earths surface.

Question: If Milo is flying through the air and he moves closer to the Earth, what happens to the temperature of the air?
Choices:
increases
decreases
Answer: A
Background: Thicker wires offer less resistance.

Question: If Mona is building a new electrical system and she installs thicker wires then were previously there, what can she expect to happen to the resistance of the system?
Choices:
increase
decrease
Answer: B
Background: Its harder to overcome friction between heavier objects and the floor than it is between lighter objects and the floor.

Question: If Milo is sliding a basketball and a baseball across the floor and the baseball is the heavier of the two objects, which object will experience more friction?
Choices:
basketball
baseball
Answer: B
Background: Muscles that are exercised are bigger and stronger than muscles that are not exercised.

Question: When you work out at the gym a lot your muscles become
Choices:
smaller
larger
Answer: B
Background: Rougher surfaces have more friction between them than smoother surfaces.

Question: A piece of sandpaper was rubbed across a glass table, then the sandpaper was rubbed across some gravel. The friction will be greater between
Choices:
the sandpaper and the glass table or
the sandpaper and the gravel.
Answer: B
Background: The development of better missiles fostered better rocket technologies.

Question: If Mona works in a defense lab and her company develops worse missiles, what happens to the advancement of rocket technologies?
Choices:
decreases
increases
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: 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 less powerful computer. The new computer will _____ the accuracy of the model's predictions.
Choices:
increase
decrease
Answer: B
Background: Electromagnetic waves with shorter wavelengths have higher frequencies and more energy.

Question: If Jim shortens the wavelength of the electromagnetic waves his machine is producing, what happens to the energy output?
Choices:
it increases
it decreases
Answer: A
Background: Energy levels farther from the nucleus of an atom have more orbitals.

Question: Reid pulled the energy levels further away from the nucleus. They are now likely to have _____ orbitals.
Choices:
less
more
Answer: B
Background: Decreasing air temperature increases atmospheric pressure.

Question: If James measured the air pressure in the winter and compared it to the air pressure in the summer, which season would have more pressure?
Choices:
winter
summer
Answer: B
Background: Different types of rocks weather at different rates. More resistant types of rocks will remain longer.

Question: John was looking at rocks in the valley and noticed something. The more resistant the rocks he looked at were, the amount they remained was
Choices:
Shorter
Longer
Answer: B
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: Will launches a rocket off the ground. As the speed of the gas that comes from the boosters decreases, the rocket's height reached
Choices:
decreases
increases
Answer: A
Background: Compared with a less powerful device, a more powerful device can either do more work in the same time or do the same work in less time.

Question: Andrew was showing Tim his underpowered phone, one day. The boys decided they wanted to go to a bookstore but needed directions, they both looked up directions on their phone, whose phone found directions faster?
Choices:
Andrew
Tim
Answer: B
Background: Breast cancer is rare in teens. It becomes more common as women get older.

Question: Eileen studied two identically sized populations of women, one in Springfield where the women were in their 50s and one in Mayfield where the women were in their 30s. The population with a higher incidence of breast cancer was
Choices:
Springfield group
Mayfield group.
Answer: A
Background: Genotypes with greater fitness produce more offspring and pass more copies of their alleles to the next generation.

Question: If a dog is extremely fit and healthy breeders will want it to have
Choices:
more offspring
less offspring
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: If Milo is measuring the seafloor and he notices the level of spreading has decreased, what will happen to the sea level?
Choices:
it will fall
it will rise
Answer: A
Background: When we add resistors in parallel to each other the total resistance decreases and the current increases.

Question: Mona is building a circuit. If she adds more resistors in parallel what happens to the total resistance of the circuit?
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 less energy travels
Choices:
short distances
long distances
Answer: A
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 slower Jan jogs, she will feel warmer
Choices:
quicker
slower
Answer: B
Background: Bacteria with a mutation the helps resist antibiotics increase in numbers, so the mutation becomes more common.

Question: Dana washes her hands a lot, so her bacteria has muted to help to resist antibiotics. As that bacteria increases in numbers, the mutation becomes
Choices:
common
rare
Answer: A
Background: The more curved the surface of a lens is, the more it refracts the light that passes through it.

Question: A pair of lenses on glasses that are not curved would refract
Choices:
less light
more light
Answer: A
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: Eric sends out an electromagnetic wave. Reid is 10 feet away and Will is 40 feet away. Who would have the weaker reading of the wave?
Choices:
Will
Reid
Answer: A
Background: The more branching there is in isomers, the lower the boiling and melting points are.

Question: If Jim is trying to raise the melting point of an isomer, what should he do to the number of branching points of the isomer?
Choices:
decrease them
increase them
Answer: A
Background: Water also gets colder as you go deeper.

Question: Anna swims across the surface of a lake and later she plunges several feet below the surface to explore. At which depth will the temperature of the water be warmer
Choices:
surface of water
several feet deep in water?
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 fewer folds will have _____ than one with more folds.
Choices:
more
less ribosomes
Answer: B
Background: The temperature of matter increases with the added energy.

Question: John was checking the temperature of the unit. He saw that as the temperature increased when the level of energy was
Choices:
Greater
Lesser
Answer: A
Background: Objects that are closer together have a stronger force of gravity between them.

Question: What would happen to the force of gravity between two soccer balls if Jim moved them closer together?
Choices:
it would increase
it would decrease
Answer: A
Background: More pollutants mean poorer air quality.

Question: When a river gets full of a lot of waste chemicals it becomes
Choices:
cleaner
dirtier
Answer: B
Background: The more the baby suckles, the more prolactin is released, which causes more milk to be produced.

Question: When a baby drinks very little milk from their mother then their mother makes
Choices:
less milk
more milk
Answer: A
Background: We need to reduce our electricity consumption in order to reduce pollution.

Question: Suppose Jim decides to use more electricity in his day to day activities. What can he expect will happen to the amount of pollution he is responsible for creating?
Choices:
it will increase
it will decrease
Answer: A
Background: In erosion, a slower moving stream will only carry smaller particles.

Question: A fast moving stream is capable of carrying _____ particles than a slow moving stream.
Choices:
larger
smaller
Answer: A
Background: Water also gets colder as you go deeper.

Question: Tina is coming back up from diving deep into the ocean. What happens to the temperature?
Choices:
it increases
it decreases
Answer: A
Background: In erosion, a slower moving stream will only carry smaller particles.

Question: John was watching the movement of a stream in the forest. He noticed that the slower moving stream would only carry particles that are
Choices:
Larger
Smaller
Answer: B
Background: In bigger atoms, valence electrons are farther from the nucleus.

Question: In large atoms valence electrons are usually
Choices:
closer
farther
Answer: B
Background: Exercising muscles increases their size, and bigger muscles have greater strength.

Question: When someone never exercises they are _____ than those that work out a lot.
Choices:
stronger
weaker
Answer: B
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: If a herd of elephants and humans are living happily in a forest and the humans then decide to move away, what happens to the elephants?
Choices:
they decrease in number
they increase in number
Answer: B
Background: The farther the object is stretched or compressed, the greater its elastic potential energy is.

Question: Stretching a rubber band out _____ its elastic potential energy.
Choices:
decreases
increases
Answer: B
Background: When particles move more quickly, temperature is higher and an object feels warmer.

Question: By filling up a party balloon with faster moving Helium particles from a gas cylinder as opposed to slower ones, would the temperature of the balloon be
Choices:
higher
lower?
Answer: A
Background: More particles inside the container means more collisions, and more collisions mean a higher pressure.

Question: If we keep deflating a balloon of oxygen particles what happens to the pressure?
Choices:
increases
decreases
Answer: B
Background: Water near shore generally has more dissolved nutrients than water farther from shore.

Question: Eric is swimming near shore. Tina is 100 meters out in the water. The water near _____ has more nutrients.
Choices:
Eric
Tina
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 we lower the temperature of water it becomes
Choices:
less dense
more dense
Answer: B
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 softer the ball was hit, the effect on the acceleration was
Choices:
decreased
increased
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 less mass than the puppy, so the elephant would have _____ inertia.
Choices:
greater
less
Answer: B
Background: The farther you stretch the band, the greater the resistance is.

Question: Eric pulls a rubber band as far as he can. The band's resistance
Choices:
decreases
increases
Answer: B
Background: Therefore, water nearer shore usually contains more dissolved nutrients than water farther from shore.

Question: If Milo takes nutrient measurements from water far from the shore, and compares them to measurements of water taken near the shore, which will contain more dissolved nutrients?
Choices:
near the shore
far from the shore
Answer: B
Background: As the Universe expands, galaxies move further and further apart.

Question: Noah has noticed that the galaxies are expanding. This will make the galaxies
Choices:
nearer
further apart.
Answer: B
Background: The louder the sounds are, the less exposure is needed to cause hearing loss.

Question: Jim works as a stage manager for a rock band and is up close to their speakers at each concert, while Todd attends the concerts and watches from dozens of rows back. Who will experience hearing loss less quickly?
Choices:
Jim
Todd
Answer: B
Background: Larger telescopes can collect more light.

Question: To view the most stars, don't use a smaller telescope because it can collect
Choices:
more or
less light.
Answer: B
Background: For example, more people on the Earth means more people contributing to global warming and pollution.

Question: What will happen to the levels of pollution on Earth if the population decreases?
Choices:
they will rise
they will fall
Answer: B
Background: Objects that are closer together have a stronger force of gravity between them.

Question: Mercury is closer to the sun than Jupiter. This means that the pull of gravity from the sun on Jupiter is
Choices:
stronger
weaker.
Answer: B
Background: If two objects have the same mass, the object with the higher temperature has greater thermal energy.

Question: Rita and Ira are identical twins of the same size. If Ira is a lower temperature, who has greater thermal energy?
Choices:
Rita
Ira
Answer: A
Background: The stronger the winds are blowing, the larger the waves are and the more energy they have.

Question: Evan surfs the waves on a day when it is windy, and then he goes back the next day when there is no wind. Which waves likely had more energy?
Choices:
windy
no wind
Answer: A
Background: Bases have pH values above 7. The higher the pH value, the more strongly basic the substance.

Question: Will measures water at a pH of 7, while a bleach solution measures at 12. Which substance is less basic?
Choices:
water
bleach
Answer: A