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Science
6th -
8thgrade
Amplify - Earth's Changing Climate Chapter 2 Critical Juncture
12 questions
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- 1. Multiple Choice
Climate researchers in Greenland can use ice core samples to tell them about methane in the atmosphere in the past. Researchers found a sample that showed a time period when methane in the atmosphere increased. What happened to the amount of energy absorbed by Earth's surface during this time? During this time, the amount of energy absorbed by Earth’s surface
stayed at a constant level.
Changed unpredictably.
increased
decreased
- 2. Multiple Choice
Geologists have found rocks showing that about 700 million years ago, there was a time period when the amount of carbon dioxide in the atmosphere decreased. How did energy in the Earth system change during this time?
There was more energy in the Earth system and more energy absorbed by Earth’s surface, because more energy entered than exited.
There was more energy in the Earth system and more energy absorbed by Earth’s surface, because less energy entered than exited.
There was less energy in the Earth system and less energy absorbed by Earth’s surface, because more energy entered than exited.
There was less energy in the Earth system and less energy absorbed by Earth’s surface, because less energy entered than exited.
- 3. Multiple Choice
There are some bacteria that release methane into the atmosphere. Scientists think that if the number of these bacteria decreased, the amount of methane in the atmosphere would decrease. What would happen to energy in the Earth system if methane in the atmosphere decreases? Energy in the Earth system would
decrease, because less energy would enter than exit. This is because less exiting energy would be redirected (bounced) back toward Earth.
decrease, because more energy would enter than exit. This is because less exiting energy would be redirected (bounced) back toward Earth.
decrease, because less energy would enter than exit. This is because less energy would be trapped by gases and held in the atmosphere.
increase, because more energy would enter than exit. This is because less energy from the sun would be redirected (bounced) back toward outer space.
- 4. Multiple Choice
Some scientists found that millions of years ago, there was a time when the number of trees increased very quickly, leading to a decrease in the amount of carbon dioxide in the atmosphere. What would you predict about the amount of energy absorbed by Earth's surface during this time? During this time, the amount of energy absorbed by Earth’s surface
increased
decreased
stayed at a consistent level.
changed unpredictably
- 5. Multiple Choice
Scientists have tools that measure the amount of energy entering and exiting the Earth system. Recently, more energy entered the system than exited. What might scientists expect to see in the atmosphere, and what has changed about energy in the Earth system during this time?
Methane decreased, leading to more energy in the Earth system and more energy absorbed by Earth's surface.
Methane decreased, leading to less energy in the Earth system and less energy absorbed by Earth's surface.
Methane increased, leading to more energy in the Earth system and more energy absorbed by Earth's surface.
Methane increased, leading to less energy in the Earth system and less energy absorbed by Earth's surface.
- 6. Multiple Choice
Ice core data from Greenland indicates there was a time period on Earth when the atmosphere changed so more energy entered the Earth system than exited. What change to the atmosphere could have caused this, and how would it have affected energy on Earth during that time?
Carbon dioxide increased, leading to more energy in the Earth system because more exiting energy was redirected (bounced) back toward Earth.
Carbon dioxide increased, leading to more energy in the Earth system because more energy was trapped by gases and held in the atmosphere.
Carbon dioxide decreased, leading to less energy in the Earth system because less exiting energy was redirected (bounced) back toward Earth.
Carbon dioxide decreased, leading to more energy in the Earth system because less energy from the sun was redirected (bounced) back toward outer space.
- 7. Multiple Choice
Fossilized shells from the Pacific Ocean show that about 15 million years ago, there was a time period when carbon dioxide in the atmosphere increased. What would have happened to the energy absorbed by Earth’s surface during this time? During this time, energy absorbed by Earth’s surface
stayed at a constant level
changed unpredictably
decreased
increased
- 8. Multiple Choice
A climatologist is creating a simulation for Earth’s climate and is working on how to set it up. One of the options for the simulation is to increase methane in the atmosphere. How should the energy in the Earth system change when the amount of methane in the atmosphere increases? There should be
more energy in the Earth system and more energy absorbed by Earth’s surface, because less energy enters than exits.
more energy in the Earth system and more energy absorbed by Earth’s surface, because more energy enters than exits.
less energy in the Earth system and less energy absorbed by Earth’s surface, because more energy enters than exits.
less energy in the Earth system and less energy absorbed by Earth’s surface, because less energy enters than exits.
- 9. Multiple Choice
Scientists think that a large amount of carbon dioxide was released from rock on the ocean floor from 120 to 80 million years ago and that this led to increased carbon dioxide in the atmosphere. What happened to energy in the Earth system during this time? Energy in the Earth system
increased, because less energy entered than exited. This is because more exiting energy was redirected (bounced) back toward Earth.
increased, because more energy entered than exited. This is because more exiting energy was redirected (bounced) back toward Earth.
increased, because more energy entered than exited. This is because more energy was trapped by gases and held in the atmosphere.
decreased, because less energy entered than exited. This is because more energy from the sun was redirected (bounced) back toward outer space.
- 10. Multiple Choice
A climatologist was working with a computer simulation that models Earth’s climate and atmosphere. She set up the controls of the simulation to decrease the amount of methane in the atmosphere. What should happen to the amount of energy absorbed by Earth’s surface? When methane decreases, the amount of energy absorbed by Earth’s surface should
change unpredictably.
stay at a constant level.
increase.
decrease.
- 11. Multiple Choice
Fossil evidence from the time of Tyrannosaurus rex (85 to 65 million years ago) shows less energy entered the Earth system than exited, even though energy from the sun didn’t change. How might the amount of carbon dioxide have changed to cause this, and how would that have changed the energy absorbed by Earth’s surface?
Carbon dioxide decreased so there was less energy in the Earth system and less energy absorbed by Earth's surface.
Carbon dioxide decreased so there was more energy in the Earth system and more energy absorbed by Earth's surface.
Carbon dioxide increased so there was more energy in the Earth system and more energy absorbed by Earth's surface.
Carbon dioxide increased so there was less energy in the Earth system and less energy absorbed by Earth's surface.
- 12. Multiple Choice
A scientist says that even if the amount of energy entering the Earth system from the sun doesn’t change, there can still be less energy entering than exiting the Earth system. What could change in the atmosphere that would cause this, and what effect would this have on energy in the Earth system?
Methane could increase, leading to more energy in the Earth system because more exiting energy would be redirected (bounced) back toward Earth.
Methane could increase, leading to less energy in the Earth system because more energy from the sun would be redirected (bounced) back toward outer space.
Methane could decrease, leading to less energy in the Earth system because less exiting energy would be redirected (bounced) back toward Earth.
Methane could decrease, leading to less energy in the Earth system because less energy would be trapped by gases and held in the atmosphere.
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