allenai/quartz huggingface dataset:
Background: At higher temperatures, particles of reactants have more energy, so they move faster.

Question: On a winter day, a person notes during a science project that the reactants have less energy, so they are now moving
Choices:
faster
slower
Answer: B
Background: Nations that have more industry produce more hazardous waste.

Question: The United states has less industry than South Korea. Therefore, there is more hazardous waste in _____.
Choices:
South Korea
the United States
Answer: A
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 high on the food chain should take in _____ toxic metals.
Choices:
more
less
Answer: A
Background: In the thermosphere, temperatures increase as altitude increases.

Question: If Mona is flying her plane in the thermosphere and she moves to a lower altitude heading, what happens to the temperature?
Choices:
increases
decreases
Answer: B
Background: Gravity is a pull which all matter exerts on all other matter, the more mass, the stronger the pull.

Question: A big planet has a _____ pull of gravity than a small planet.
Choices:
stronger
weaker
Answer: A
Background: Faster-moving water has more energy.

Question: Sandy is running around the house doing laps. The slower she runs, the amount of energy she has is
Choices:
more
less
Answer: B
Background: Water flowing over a steeper slope moves faster and causes more erosion.

Question: Lana is watching two waterfalls. The first waterfall is very steep, and the other is just a slope. The waterfall which will have the least erosion at the bottom is the one with the water which falls
Choices:
slower
faster
Answer: A
Background: In transipration, at warmer temperatures water molecules move faster, and the rate of evaporation from stomata is therefore much faster.

Question: John monitors the log to see the temperature of the water, and he notices that as the temperature falls, the evaporation rate is
Choices:
Higher
Lower.
Answer: B
Background: New farm machines were invented. They increased the amount of food that could be produced. With more food, people were healthier and could live longer.

Question: Jefferson built a farm machine to increase food production. This likely will cause the population's lifespan to
Choices:
increase
decrease
Answer: A
Background: Less massive objects also have less gravity than more massive objects.

Question: Dan's small globe will have this kind of gravity compared to his larger globe:
Choices:
more
less
Answer: B
Background: With a higher concentration of hydrogen ions, a solution is more acidic but has a lower pH.

Question: If Jim adds hydrogen ions to his solution, what will happen to the level of acidity?
Choices:
it will become less acidic
it will become more acidic
Answer: B
Background: Electrons at lower energy levels, which are closer to the nucleus, have less energy.

Question: Electrons closer to a nucleus have _____ energy levels than further away ones.
Choices:
higher
lower
Answer: B
Background: The size of the eroded particles depends on the velocity of the water. Eventually, the water deposits the materials. As water slows, larger particles are deposited. As the water slows even more, smaller particles are deposited.

Question: If Mona is rafting on a river and the river is moving quickly, what happens to the size of particles that river deposits if the water slows down?
Choices:
increases
decreases
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: Sean is trying to see how fast the water molecules are moving in a container of water. He observes that the molecules are moving very quickly, so the temperature must be
Choices:
cool
warm
Answer: B
Background: Older rocks are at the bottom and younger rocks are at the top.

Question: Rick had a rock (Rock A) from 1000 feet beneath the crust's surface. He later dug 3000 feet deeper and got a second rock (Rock B). Which rock is likely younger?
Choices:
Rock A
Rock B
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 increased, what will happen to the sea level?
Choices:
it will fall
it will rise
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 increases the total number of resistors in her new circuit, what happens to the total current of the circuit?
Choices:
increase
decrease
Answer: B
Background: The voice becomes deeper as the larynx in the throat grows larger.

Question: Eric underwent surgery to decrease the size of his larynx. His voice is now
Choices:
higher
deeper
Answer: A
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 Mona is in her greenhouse monitoring her plants and she decides to lower the temperature inside, what happens to the rate of cellular respiration her plants exhibit?
Choices:
decreases
increases
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: If Ben exercises daily, and Anna exercises only weekly, who has a stronger heart?
Choices:
Ben
Anna
Answer: A
Background: Temperature increases with depth inside the Earth, so melting of rocks is more likely to occur at greater depths.

Question: What happens when we head towards the core of the earth?
Choices:
temperatures decrease
temperatures increase
Answer: B
Background: The closer together the particles in a longitudinal wave are, the greater the amplitude.

Question: If Mona creates a longitudinal wave and decreases the distance of the particles in the wave, what happens to the amplitude of that wave?
Choices:
increases
decreases
Answer: A
Background: The pupil automatically gets bigger or smaller to let more or less light in as needed.

Question: When it is day time the pupils in our eyes are _____ open than normal.
Choices:
more
less
Answer: B
Background: If we have two materials with the same volume, the material with a higher mass will be more dense.

Question: Mike put two things into buckets of water. The first bucket got a rubber duck, and the second bucket got a bowling ball. The water was more displaced in the bucket with the bowling ball, because the mass was
Choices:
larger
smaller
Answer: A
Background: In the mesosphere, temperature decreases as altitude increases.

Question: If a person went higher into the mesosphere, would the temperature
Choices:
increase
decrease
Answer: B
Background: Many of the worlds people live with water scarcity, and that percentage will increase as populations increase and climate changes.

Question: The population in Milo's city has been decreasing recently. What will happen to the city's level of water scarcity?
Choices:
decrease
increase
Answer: A
Background: The more charged the objects are, the stronger the electrostatic force between them.

Question: If Mona is manipulating the charge of a couple of her objects, what happens to the electrostatic force if she decreases the charge of one of the objects?
Choices:
increase
decrease
Answer: B
Background: The louder the sounds are, the less exposure is needed to cause hearing loss.

Question: If you are at a loud rock concert what will not happen to your hearing?
Choices:
increase
decrease
Answer: A
Background: A stronger acid produces a greater concentration of ions than a weaker acid.

Question: If you subtracted more citric acid from orange juice the acid levels would
Choices:
decrease
increase
Answer: A
Background: The more similar the DNA molecules of different species are, the closer the relationship is likely to be.

Question: Two species with very dissimilar DNA are probably _____ related.
Choices:
distantly
closely
Answer: A
Background: If we increase the resistance in a series circuit, by adding more resistors, then the total current decreases.

Question: Decreasing the resistance in a series circuit will lead to _____ total current.
Choices:
more
less
Answer: A
Background: However, the melanocytes of people with darker skin produce more melanin.

Question: Eric has dark skin and Rita has light skin. Who produces less melanin?
Choices:
Eric
Rita
Answer: B
Background: Water density increases as salinity and pressure increase, or as temperature decreases.

Question: Shannon is swimming and wants to find the densest water to soak in. She will find water that has a pressure that is
Choices:
lower
higher
Answer: B
Background: The Earth travels faster in its elliptical orbit when it is closer to the Sun than when it is farther away.

Question: When something is gravitationally close to something else it will go
Choices:
slower
faster
Answer: B
Background: When two skateboarders push against each other, it causes them to move apart. The harder they push together, the farther apart they move.

Question: Scott rolls two balls together until they strike each other. When Scott rolls the balls softly, they are apart a
Choices:
great distance
small distance
Answer: B
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 cool?
Choices:
enlarge
contract
Answer: B
Background: More water allows more chemical reactions.

Question: When we subtract more water to something there will be
Choices:
fewer reactions
more reactions
Answer: A
Background: The longer the resistor, the more resistance it has.

Question: Terry adds a longer resistor to the circuit. The resistor offer _____ than the other one.
Choices:
more
less
Answer: A
Background: The closer to the surface an aquifer is, the easier it is to get the water.

Question: If Milo is hunting for water and he finds two water sources, which one will it be harder for him to extract water from?
Choices:
one close to the surface
one far from the surface
Answer: B
Background: The hotter a main sequence star is, the brighter it is.

Question: Mona is an astronomer who looks at stars for a living. If she is observing how hot certain stars are and she notices that one is hotter then the others, what does that say about the brightness of that star?
Choices:
it's dimmer
it's brighter
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: A model created with much computing power should have a _____ chance of being accurate.
Choices:
lower
higher
Answer: B
Background: A wave caused by a disturbance with more energy has greater amplitude.

Question: Will waves on the ocean be larger or smaller if they are caused by wind compared to rocks?
Choices:
larger
smaller
Answer: B
Background: As the amount of water increases, the melting point of rock decreases.

Question: Rocks that have no water in them have a
Choices:
high melting point
low melting point
Answer: A
Background: Light-skinned people get sunburned more quickly than people with darker skin.

Question: A pale person will sunburn _____ than a dark-skinned person.
Choices:
slower
faster
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: Eric sends out an electromagnetic wave. Reid is 10 feet away and Will is 40 feet away. Who would have the stronger reading of the wave?
Choices:
Will
Reid
Answer: B
Background: The full box is harder to move because it has greater mass and therefore greater inertia.

Question: Decreasing the mass of an object causes its inertia to
Choices:
increase
decrease
Answer: B
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: Asa is running in a race and his body temperature increases. His skin's blood vessels _____ in diameter.
Choices:
increase
decrease
Answer: A
Background: The hotter a resistor becomes the more resistance it has.

Question: Max notices that the resistor is getting hotter. He is concerned that the resistor will offer
Choices:
less resistance.
more resistance
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: Eric increased the temperature on the thermostat. The rates of reaction in the room now happen more
Choices:
quickly
slowly
Answer: A
Background: The closer together the particles in a longitudinal wave are, the greater the amplitude.

Question: As Kyle examines how longitudinal waves work, he notes that these particular waves have a great amount of amplitude. Kyle now knows that it means that the particles of these particular longitudinal waves are
Choices:
closer together
farther apart
Answer: A
Background: With a higher the concentration of hydrogen ions, a solution is more acidic and has a lower pH.

Question: Would Jim's solution become more or less acidic if he decreased the concentration of hydrogen atoms in it?
Choices:
more acidic
less acidic
Answer: B
Background: A wave caused by a disturbance with more energy has greater amplitude.

Question: Kelly drops a 5kg weight and a 10kg weight in two similarly sized buckets. If this creates a wave, the wave with more amplitude was caused by the
Choices:
5kg
10kg
Answer: B
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: If Milo calms down and his heart starts pumping less blood with each stroke, what happens to his heart rate?
Choices:
increases
decreases
Answer: A
Background: We need to reduce our electricity consumption in order to reduce pollution.

Question: Suppose Jim decides to use less 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: B
Background: The smaller its mass is, the greater its acceleration for a given amount of force.

Question: If Milo is racing cars on a track and one car has less mass then another, what does that tell him about the smaller cars acceleration potential compared to the larger car?
Choices:
it's higher
it's lower
Answer: A
Background: The more cylinders a car engine has, the more powerful its engine can be.

Question: Mona is designing a car in a factory. If she decides to remove cylinders from the car's engine, what happens to the power that engine can output?
Choices:
increased
decreased
Answer: B
Background: The farther the object is stretched or compressed, the greater its elastic potential energy is.

Question: Decker pulls some taffy as far as he can then lets it contract. The elastic potential energy of the candy would
Choices:
increase
decrease
Answer: B
Background: Thicker resistors offer less resistance than thinner resistors.

Question: A thin wire will carry _____ current than a large piece of wire.
Choices:
more
less
Answer: B
Background: If blood volume in the body decreases, blood pressure decreases.

Question: If Milo cuts himself shaving and gains a lot of blood, what happens to his blood pressure?
Choices:
increases
decreases
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: A non-smoker's body works _____ just to get needed air.
Choices:
less
more
Answer: A
Background: Most nutrients are washed into ocean water from land. Therefore, water closer to shore tends to have more nutrients.

Question: Will found water from a source 10m from shore. Eric found water from a source 2m from shore. Whose water likely contains the most nutrients?
Choices:
Will
Eric
Answer: B
Background: Developing nations will also increase demands on natural resources as they build more factories.

Question: If China decides to build fewer factories to produce goods, what will happen to their demand for natural resources?
Choices:
increase
decrease
Answer: B
Background: Because these isotopes decay more slowly, they can be used to date much older specimens.

Question: Fred has an isotope that decays quickly. What is likely true about it?
Choices:
it can be used to date older specimens
it can't be used to date old specimens
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: Kate is going to diffuse a liquid and a gas. The gas is diffused first, because the particles with it are
Choices:
closer together
further apart
Answer: B
Background: Faster-moving water has more energy.

Question: If Jim opens his water tap so that the water moves faster, what will happen to the energy levels of the water?
Choices:
they will decrease
they will increase
Answer: B
Background: The stratosphere contains the ozone layer, the temperatures increase as altitude increases.

Question: Tina flew lower and lower into the stratosphere. The temperature of her ship
Choices:
increases
decreases
Answer: B
Background: Less photosynthesis means that plants and phytoplankton produce less food.

Question: Sarah's plants have been greatly photosynthesizing regularly, so that means that the plants now produce food in amounts that are
Choices:
lesser
greater
Answer: B
Background: As the distance between the objects increases, the force of gravitational attraction decreases.

Question: If a car and a truck drive away from each other, what happens to the gravitational attraction between the two vehicles?
Choices:
increases
decreases
Answer: B
Background: Larger telescopes can collect more light and see finer details than smaller telescopes.

Question: Mona is trying to build a telescope that will collect less light then her current one. If she wants to make sure to achieve this goal, what should she do to the size of her telescope?
Choices:
decrease it
increase it
Answer: A
Background: The darker the urine, the less water it contains.

Question: Sandra had to pee, and when she did, she noticed her urine was nearly clear, because she had consumed water in
Choices:
greater amounts
lesser amounts
Answer: A
Background: In general, fossils in older rocks are less similar to modern organisms.

Question: Jimmy found a fossil on the beach. He compared it to a fossil in the museum that was much older. Which fossil more likely resembles modern organisms?
Choices:
beach fossil
museum fossil
Answer: A
Background: The bigger the waves are and the more sediment they carry, the more erosion they cause.

Question: Jimbo was sitting at the beach watching the waves. He noticed the waves were decreasing in size. What does this mean for the amount of erosion that the waves will cause?
Choices:
decrease
increase
Answer: A
Background: For bases we can state the folllowing: The higher the pH of a substance, the more basic it is.

Question: John was looking at the bases and noticed something. The higher the pH of the substance, the amount of basic it was
Choices:
Increased
Decreased
Answer: A
Background: The size of an ocean wave depends on how fast, over how great a distance, and how long the wind blows. The greater each of these factors is, the bigger a wave will be.

Question: Michel watched the fast waves hit shore with power. The waves were _____.
Choices:
big
small
Answer: A
Background: Larger alkenes have lower boiling and melting points.

Question: Mark is boiling alkenes and wants to see which will boil last; the larger ones or the smaller ones. The alkenes that will boil last are the ones that are
Choices:
smaller
larger
Answer: A
Background: A higher-frequency wave has more energy than a lower-frequency wave with the same amplitude.

Question: A wave with more energy than another will have a _____-frequency.
Choices:
lower
higher
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 away and get _____.
Choices:
larger
smaller
Answer: B
Background: Longer wires have more resistance than shorter wires.

Question: A shorter wire will have _____ resistance than a longer one.
Choices:
more
less
Answer: B
Background: Lighter, more streamlined vehicles need less energy.

Question: A vehicle that was sleek and aerodynamic and a vehicle that was bulky were each driven the same distance over the same amount of time. Which vehicle needed to less energy to power it?
Choices:
bulky vehicle
sleek vehicle
Answer: B
Background: The more dense the medium, the slower the light moves.

Question: John was looking at the lights passing through the object. He noticed that the more dense the medium, the light would move
Choices:
Faster
Slower
Answer: B
Background: Light-skinned people get sunburned more quickly than people with darker skin.

Question: Jeff has dark skin and stays on the beach with Layla, who has light skin, for 2 hours. Neither use sunblock. Who is likely less sunburned?
Choices:
Jeff
Lydia
Answer: A
Background: The more dense the medium, the slower the light moves.

Question: If Mona shines a light through both wool and cotton and determines that cotton is more dense then wool, which material will the light move faster through?
Choices:
wool
cotton
Answer: A
Background: Low food supply or a lack of space can lower birth rates, increase death rates, or lead to emigration.

Question: Tasha is studying birth rates in various countries. She looks at two countries. In South Africa, the food supply is currently lower than in Australia. Because of this, the birth rate in South Africa, compared to Australia, will be
Choices:
lower
higher
Answer: A
Background: A sunscreen with a higher SPF value protects the skin longer.

Question: Allie looks for sunscreen at the store. She sees SPF 30 and SPF 100. Which likely protects her skin worse?
Choices:
SPF 30
SPF 100
Answer: A
Background: A thinner wire is more difficult for electrons to move through than a thicker wire.

Question: Eric has a 4in diameter cable. Rita has a 1in diameter cable. Electrons could likely move faster through
Choices:
Eric's cable
Rita's cable
Answer: A
Background: People in the richer nations of the world use far more energy, especially energy from fossil fuels, than people in the poorer nations do.

Question: Will was farming in a rich country when he noticed he his energy consumption was high. Despite this, his consumption of energy is likely much _____ than that of a poor country.
Choices:
lesser
greater
Answer: B
Background: Less massive objects also have less gravity than more massive objects.

Question: Which of these items has less gravitational strength?
Choices:
the moon
earth
Answer: A
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 feathers or a sack of hammers, both of the same volume, would it be easier to push the
Choices:
sack of feathers
sack of hammers?
Answer: A
Background: It would be hard to get a big chunk of chocolate to dissolve in your milk or hot water. Maybe you could make hot chocolate from some smaller pieces like chocolate chips, but it is much easier to add a powder to your milk. This is because the smaller the pieces are, the more surface area they have.

Question: Curt wants to make a drink from chocolate chips and milk. To make the chips melt more slowly, Shane will use chips that are
Choices:
bigger
smaller
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: Don notices that the patient's heart is expelling more blood with each stroke. The patient's heart has to beat _____ often to maintain consistent blood flow.
Choices:
more
less
Answer: B
Background: Size restriction: The final body size is limited because as the body size increases, the surface area to volume ratio decreases.

Question: An increase in body size will cause a concomitant _____ in its surface area to volume ratio.
Choices:
increase
decrease
Answer: B
Background: Increasing the number of resistors in a series circuit increases the overall resistance of the circuit.

Question: If Milo is building a new circuit and he increases the number of resistors in a series on that circuit, what happens to the overall resistance of the circuit?
Choices:
increases
decreases
Answer: A
Background: In transipration, at warmer temperatures water molecules move faster, and the rate of evaporation from stomata is therefore much faster.

Question: If Mary decreased the temperature in her greenhouse what would happen to the rate of evaporation from water on her plants?
Choices:
it would increase
it would decrease?
Answer: B
Background: The higher the crests of a wave are, the greater the amplitude.

Question: Ian surfed a 6 foot wave. Tony surfed a 10 foot wave. The wave with the lowest amplitude was
Choices:
Tony's
Ian's
Answer: B
Background: A sunscreen with a higher SPF value protects the skin longer.

Question: A sunscreen with an SPF value of 15 will protect skin _____ than a sunscreen with an SPF value of 30.
Choices:
more
less
Answer: B
Background: We can say that resistance and current in an electric circuit areinversely proportional, because as the one increases, the other decreases, and vice versa.

Question: Harold decreased the current in a circuit. The resistance now is
Choices:
higher
lower
Answer: A
Background: Warming up exercises increases the blood flow to the muscles and increases the heart rate.

Question: James spent 30 minutes exercising while Mary spent only 10 minutes exercising. Which person had the higher heart rate?
Choices:
Mary
James
Answer: B
Background: Temperature increases with depth inside the Earth, so melting of rocks is more likely to occur at greater depths.

Question: James stares at the volcano and saw the rocks melt because of the _____ temperatures.
Choices:
high
low
Answer: A
Background: Muscles that are exercised are bigger and stronger than muscles that are not exercised.

Question: When you work out at the gym less your muscles become
Choices:
smaller
larger
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: Derek felt warm as he stood in the sun, and since his body was heating up, he knew that his blood vessels in his skin were
Choices:
expanding
contracting
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 Francium with a 22 minute half-life, would Carbon 14 with its 5730 year half-life be a
Choices:
less useful isotope?
more useful isotope
Answer: B
Background: Energy levels farther from the nucleus of an atom have more orbitals.

Question: Reid pulled the energy levels closer to the nucleus. They are now likely to have _____ orbitals.
Choices:
less
more
Answer: A
Background: Electrons at lower energy levels, which are closer to the nucleus, have less energy.

Question: An electron with an increased energy level will have energy that is
Choices:
lower
higher
Answer: B
Background: As the distance between the objects increases the magnetic force of attraction decreases.

Question: Planets moving closer together will have _____ magnetic attraction.
Choices:
less
more
Answer: B
Background: Energy levels farther from the nucleus of an atom have more orbitals.

Question: Dana is trying to see how far the energy levels are from the nucleus in an atom. Since the energy levels are very far from the nucleus, the atom has
Choices:
less orbitals
more orbitals
Answer: B
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 least dense object will be the one with _____ mass.
Choices:
higher
lower
Answer: B
Background: Faster-moving water has more energy.

Question: Ollie pours his water quickly while Fay pours her water slowly. Whose water contains more energy?
Choices:
Ollie
Fay
Answer: A
Background: The more energy the particles in matter have, the faster and more strongly they vibrate.

Question: Chris sees a particle with low energy. Chris knows it has not a lot of energy because it vibrates
Choices:
weakly
powerfully
Answer: A
Background: An object with greater mass or greater velocity has more kinetic energy.

Question: Which object likely contains more energy?
Choices:
a pinhead
the sun
Answer: B
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 lighter item will be the
Choices:
feathers
bricks
Answer: A
Background: Gravity is a pull which all matter exerts on all other matter, the more mass, the stronger the pull.

Question: James is a much bigger person than Sally. Which person has more gravity?
Choices:
Sally
James
Answer: B
Background: The hotter a resistor becomes the more resistance it has.

Question: If a piece of wire it gets very cold it will have
Choices:
more resistance
less resistance
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 decreases. What will happen to the air pressure?
Choices:
increase
decrease
Answer: A
Background: A higher-frequency wave has more energy than a lower-frequency wave with the same amplitude.

Question: Will sees a wave with a frequency of 60hz and a wave with a frequency of 10hz. Which wave has more energy?
Choices:
the 60hz wave
the 10hz wave
Answer: A
Background: Less photosynthesis means that plants and phytoplankton produce less food.

Question: Jean has two plants, one with leaves, and one that has had the leaves stripped from it. The plant stripped of its leaves will produce food in amounts that are
Choices:
smaller
larger
Answer: A
Background: As you increase the number of carbon atoms in a hydrocarbon, the number of isomers quickly increases.

Question: A halving of carbon atoms in a hydrocarbon will cause _____ isomers.
Choices:
more
less
Answer: B
Background: For a given medium, sound has a slower speed at lower temperatures.

Question: If Jim turns the thermostat down in his room while listening to music, what will happen to the speed of the sound waves in the room?
Choices:
they will speed up
they will slow down
Answer: B
Background: The stratosphere contains the ozone layer, the temperatures increase as altitude increases.

Question: As you travel below the ozone layer the temperatures become
Choices:
higher
lower
Answer: B
Background: Thicker resistors offer less resistance than thinner resistors.

Question: The larger a resistor equals _____ resistance.
Choices:
less
more
Answer: A
Background: In a series circuit, the resistance increases as more resistors are added in series.

Question: Steve noticed when looking at the series circuit that as more resistors were added the resistance
Choices:
increased
decreased
Answer: A
Background: The gravitational force between two objects decreases as the objects move further apart.

Question: Would an astronaut feel a greater gravitational pull from the Earth when he is standing
Choices:
on the floor of his house
on the surface of Mars?
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 more insulin so she would need to account for this.
Choices:
increase
decrease
Answer: A
Background: The size of an ocean wave depends on how fast, over how great a distance, and how long the wind blows. The greater each of these factors is, the bigger a wave will be.

Question: Phil surfed huge 15 foot waves on the beach. _____ wind speeds likely contributed to such large waves
Choices:
high
low
Answer: A
Background: The more the baby suckles, the more prolactin is released, which causes more milk to be produced.

Question: When a baby drinks a lot of milk from their mother then their mother makes
Choices:
less milk
more milk
Answer: B
Background: When two skateboarders push against each other, it causes them to move apart. The harder they push together, the farther apart they move.

Question: Scott rolls two balls together until they strike each other. When Scott rolls the balls softly, they barely move apart, and when Scott thrusts the balls at one another, they are apart a
Choices:
great distance
small distance
Answer: A
Background: Thicker resistors offer less resistance than thinner resistors.

Question: When Dan got a thin resistor, he knew that its resistance would be
Choices:
more
less
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 lower, what happens to the baseness of the water?
Choices:
higher
lower
Answer: B
Background: The closer the charged objects are, the stronger the electrostatic force.

Question: When two batteries are placed together, John can tell that the electrostatic force is
Choices:
more
less
Answer: A
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: When the temperature goes down the rate that cells respirate
Choices:
increases
decreases
Answer: B
Background: It would be hard to get a big chunk of chocolate to dissolve in your milk or hot water. Maybe you could make hot chocolate from some smaller pieces like chocolate chips, but it is much easier to add a powder to your milk. This is because the smaller the pieces are, the more surface area they have.

Question: Curt wants to make a drink from chocolate chips and milk. To make the chips melt faster, Shane will use chips that are
Choices:
bigger
smaller
Answer: B
Background: Water flowing over a steeper slope moves faster and causes more erosion.

Question: Liv is playing with an adjustable water slide. When she makes the angle shallower, water will slide down
Choices:
slower
faster
Answer: A
Background: The size of an ocean wave depends on how fast, over how great a distance, and how long the wind blows. The greater each of these factors is, the bigger a wave will be.

Question: John was watching the ocean from the beach and after a long period of observation, he concluded that the more wind there is, that the waves will become
Choices:
Bigger
Smaller
Answer: A
Background: Air in the troposphere is warmer closer to Earths surface.

Question: As the rocket falls down through the troposphere and gets nearer to the Earth's surface, the air will be
Choices:
warmer
cooler
Answer: A
Background: Therefore, increasing the surface area of solid reactants increases the reaction rate.

Question: Eric removed more and more reactants from his mixture. The reaction rate will now be
Choices:
slower
faster
Answer: A
Background: The larger the animal, the heavier the exoskeleton, making movement more difficult.

Question: When an animal is smaller it needs to have a
Choices:
smaller skeleton
larger skeleton
Answer: A
Background: Genotypes with greater fitness produce more offspring and pass more copies of their alleles to the next generation.

Question: A genotype with poor fitness will likely produce _____ offspring than a more fit one.
Choices:
more
less
Answer: B
Background: Larger alkenes have lower boiling and melting points.

Question: Mark is boiling alkenes and wants to see which will boil first; the larger ones or the smaller ones. The alkenes that will boil first are the ones that are
Choices:
smaller
larger
Answer: B
Background: The farther the object is stretched or compressed, the greater its elastic potential energy is.

Question: If Mona is playing with a rubber band and she decides to stretch it out very little, what happens to the elastic potential energy of the rubber band?
Choices:
increases
decreases
Answer: B
Background: The more charged the objects are, the stronger the electrostatic force between them.

Question: Megan had two charged metal balls that she was analyzing. If she decreases the charge of the balls, the electrostatic force between them
Choices:
decreases
increases
Answer: A
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: Milo operates a greenhouse for profit. One day he turns up the humidity controls. What will happen to the rate of transpiration of the plants in the greenhouse?
Choices:
increase
decrease
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 less and less processors to the supercomputer. The supercomputer will now likely be _____ powerful.
Choices:
more
less
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: Boris was tasked with developing a hypersonic rocket. He built two prototypes that were identical except that they have different gas velocities out of the nozzle. Which rocket was likely the slowest?
Choices:
the rocket with highest gas velocity
the rocket with lowest gas velocity
Answer: B
Background: More water allows more chemical reactions.

Question: By pouring a cup of water into two dry powders that would react if they were hydrated, does the rate at which the powders
Choices:
decrease?
increase
Answer: B
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: A person with a high fever will have _____ of the blood vessels in the skin.
Choices:
narrowing
widening
Answer: A
Background: On a hot day, an endotherm may give off more heat by increasing blood flow to the surface of the body.

Question: After Sarah finishes her run, she notices that her blood is really pumping. Sarah can know that since it's a hot day, she's giving off what kind of heat compared to usual?
Choices:
more
less
Answer: A
Background: The more curved the surface of a lens is, the more it refracts light.

Question: If a lens gains more curvature, it will refract _____ light.
Choices:
more
less
Answer: A
Background: More advanced farming practices allowed a single farmer to grow food for many more people.

Question: John was studying the history of agriculture for his master's project. He noticed as the methods of farming became more advanced, the amount of food became
Choices:
Larger
Smaller
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 away from the Earth, what happens to the tidal pull of that astral body?
Choices:
it increases
it decreases
Answer: B
Background: A sunscreen with a higher SPF value protects the skin longer.

Question: Allie looks for sunscreen at the store. She sees SPF 30 and SPF 100. Which likely protects her skin better?
Choices:
SPF 30
SPF 100
Answer: B
Background: The size of an ocean wave depends on how fast, over how great a distance, and how long the wind blows. The greater each of these factors is, the bigger a wave will be.

Question: John was watching the ocean from the beach and after a long period of observation, he concluded that the less wind there is, that the waves will become
Choices:
Bigger
Smaller
Answer: B
Background: The higher the pH value is, the stronger the base.

Question: John was looking at some chemicals in the chemistry lab. He saw that the lower the ph value was, the base became
Choices:
Larger
Smaller
Answer: B
Background: Thicker wires offer less resistance.

Question: Which likely offers the least amount of resistance?
Choices:
a boat towing cable
a telephone cable
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: B
Background: Lower rock layers were laid down earlier, so they are assumed to contain older fossils.

Question: Everett dug down 100 feet while Jamie dug down 10 feet. Who is more likely to find old fossils?
Choices:
Everett
Jamie
Answer: A
Background: The closer objects are, the stronger the gravitational pull between them.

Question: If Mona moves her baseballs farther apart, what happens to the gravitational pull between them?
Choices:
increases
decreases
Answer: B
Background: Temperature increases with depth inside the Earth, so melting of rocks is more likely to occur at greater depths.

Question: Mark studies rocks for a living. He is curious if rocks deeper in the Earth will be warmer or cooler. If Mark were to take the temperature of a rock that is half a mile into the Earth's surface, and then take the temperature of a rock 1 mile into the Earth's surface, he would find that the rock half a mile into the Earth's temperature is
Choices:
lower.
higher
Answer: A
Background: Warmer molecules vibrate faster than cooler ones.

Question: If Milo places his coffee into the microwave and cools it off, what will happen to the rate of vibration of the molecules in the drink?
Choices:
increase
decrease
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 more photon energy.
Choices:
Bill
Will
Answer: B
Background: The further objects are away from each other, the smaller the gravitational force.

Question: If Mona is holding two pieces of fruit and she moves them farther away from each other, what happens to the gravitational force between the two fruits?
Choices:
increase
decrease
Answer: B
Background: So more water is displaced by a bigger body than a smaller one.

Question: If we drop a small ball into a pool there will be _____ water shot out than a small ball.
Choices:
less
more
Answer: A
Background: The closer the charged objects are, the stronger the electrostatic force.

Question: Ian wants to have a very weak electrostatic force, so he will make sure that his charged objects are
Choices:
closer
farther
Answer: B
Background: The closer to pH 14, the more strongly basic the solution.

Question: If we tested a solution and it was 2 on the pH scale it would be
Choices:
acidic
basic
Answer: A
Background: It would be hard to get a big chunk of chocolate to dissolve in your milk or hot water. Maybe you could make hot chocolate from some smaller pieces like chocolate chips, but it is much easier to add a powder to your milk. This is because the smaller the pieces are, the more surface area they have.

Question: Will one large piece have more or less surface area than smaller pieces?
Choices:
less
more
Answer: A
Background: The size of the eroded particles depends on the velocity of the water. Eventually, the water deposits the materials. As water slows, larger particles are deposited. As the water slows even more, smaller particles are deposited.

Question: Mike wants to see how fast water can run while not depositing small particles. In order to avoid get the smaller particles deposited, Mike will need the water to be running
Choices:
quickly
slowly
Answer: A
Background: For example, more people on the Earth means more people contributing to global warming and pollution.

Question: Mona lives on a planet with an unstable population. If the number of people on her planet were to increase, what would happen to global warming on her planet?
Choices:
increase
decrease
Answer: A
Background: In the thermosphere, temperatures increase as altitude increases.

Question: When we are trying to move through the thermosphere the lower we go the _____ it will feel
Choices:
colder
warmer
Answer: A
Background: Better farming techniques and machines increased the food supply and the distribution of food.

Question: When people figured out how to lessen food the levels of food in the world
Choices:
increased
decreased
Answer: B
Background: Warming up exercises increases the blood flow to the muscles and increases the heart rate.

Question: James spent 30 minutes exercising while Mary spent only 10 minutes exercising. Which person had the lower heart rate?
Choices:
Mary
James
Answer: A
Background: The water table is higher when there is a lot of rain and lower when the weather is dry.

Question: If Jim measures the water table of his local region before it rains and compares it to a measurement taken after it rains, it will be lower
Choices:
before it rains
after it rains
Answer: A
Background: The closer to the surface an aquifer is, the easier it is to get the water.

Question: Reid installed an aquifer 20m from the surface. Will installed an aquifer 10m from the surface. Whose aquifer is easier to get water from?
Choices:
Reid
Will
Answer: B
Background: Breast cancer is rare in teens but becomes more common as females get older.

Question: Jay's risk of breast cancer is 10% at age 50. Was her risk higher or lower when she was 25?
Choices:
lower
higher
Answer: A
Background: In refraction of light, the greater the change in speed, the more light bends.

Question: When light speeds up it is more likely to
Choices:
stay straight
bend
Answer: B
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: When we are tired and running out of energy while running what will happen?
Choices:
speed up
slow down
Answer: B
Background: The water table is higher when there is a lot of rain and lower when the weather is dry.

Question: If Mona lives in a country that doesn't get a lot of rain and it rains extra hard one day, what does that do to the water table?
Choices:
increases
decreases
Answer: A
Background: Air in the troposphere is warmer closer to Earths surface.

Question: As the rocket shoots up through the troposphere and gets farther from the Earth's surface, the air will be
Choices:
warmer
cooler
Answer: B
Background: In the mesosphere, temperature decreases as altitude increases.

Question: If a person sank lower within the mesosphere, would the temperature
Choices:
increase
decrease
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 they are
Choices:
younger
older
Answer: B
Background: A fluid exerts pressure in all directions, but the pressure is greater at greater depth.

Question: Mike dove higher and higher out of the ocean trench. As he goes higher, the pressure exerted on him by the water
Choices:
increases
decreases
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 Bob starts exercising, his heart muscle should become
Choices:
stronger
weaker
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: A stream going across a low plain will have to do _____ cutting.
Choices:
much
little
Answer: B