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Question 1 of 4
1
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Match the keywords and their definitions.
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The amount of carbon dioxide in the atmosphere, measured in ppm
A long sample drilled from glaciers that records past climates
The variety of living things in an ecosystem or area
A physical record in the Earth showing a major change in history
A physical material like forest or desert covering Earth's surface
CO2 concentration
Ice core
Biodiversity
Geological marker
Land cover
Think about what each keyword is used to measure or show.
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