25-26 Earth's Changing Climate Key Concepts

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Although there are many ​

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, there is a ​

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toward​

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temperatures and ​

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ice on Earth since about 1880.

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increasing

decreasing

fluctuations

trend

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Carbon dioxide and methane ​

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energy from ​

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by redirecting energy that would have ​

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the system.

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stop

leaving

exited

allows

stay

stayed in

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Global average temperature ​

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when ​

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absorbed by the surface ​

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.

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increases

decreases

energy

temperature

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When the amount of ​

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or ​

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in the atmosphere ​

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, the amount of ​

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absorbed by the surface also changes.

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carbon dioxide

methane

energy

changes

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When the amount of ​

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or ​

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​

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, energy absorbed by the surface ​

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.

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carbon dioxide

methane

increases

decreases

oxygen

heat

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When the amount of carbon dioxide or methane ​

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, energy absorbed by the surface ​

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.

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decreases

increases

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A system can be ​

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, even as something flows ​

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and ​

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the system. If this balanced flow is ​

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, there may be ​

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to the system.

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stable

disrupted

changes

into

out of

stays the same

on going

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A change to either the amount of energy ​

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or ​

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the Earth system affects how much ​

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is absorbed by the ​

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.

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entering

exiting

energy

surface

heat

air

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Temperature​

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if more energy ​

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than ​

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.

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decreases

less

increases

enters

exits

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Temperature ​

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if ​

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energy enters than exits.

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decreases

less

increases

more

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If there is an increase in the amount of carbon dioxide or methane, the amount of energy ​

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the Earth system ​

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, so ​

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energy enters than exits.

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leaving

decreases

more

entering

increases

less

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If there is a decrease in the amount of carbon dioxide or methane, the amount of energy ​

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the Earth system ​

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, so ​

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energy enters than exits.

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leaving

increases

less

entering

decreases

more

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Carbon dioxide and methane in the atmosphere ​

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as a result of ​

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, such as ​

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.

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increase

human activities

combustion

decrease

animals

recycling

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Some ways to ​

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the ​

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of carbon dioxide and methane include ​

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combustion and ​

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these gases from the atmosphere.

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stop

increase

decreasing

removing

continue

decrease

increasing

adding

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​

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can take actions in their daily lives that will ​

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the amount of ​

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and ​

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in the atmosphere.

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Humans

reduce

carbon dioxide

methane

Animals

increase