Exit Quiz

Question 1 of 4
1 of 4
Match the keywords and their definitions.
Click and drag answers to change the order, or select using Tab then move by pressing Space and the arrows on your keyboard.
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.