1
By XKCD
This small infographic shows the thickness of see ice up against famous city skylines. Notice how much bigger the ice sheets are than the cities!
Grade Level   4 5 6 7 8 9 10 11 12
Image Collections Teaching Media
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2
By XKCD
This website provides a timeline of Earth's temperature beginning thousands of years ago, to the current and future times to show how much warming earth has encountered.
Grade Level   9 10 11 12
Classroom Activities Curricula and Instruction
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