More cards in this set

Card 6

Front

name 2 tropics

Back

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Card 7

Front

what id the diameter of the earth (at the equator)?

Back

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Card 8

Front

what is a meridian

Back

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Card 9

Front

what chemicals stop microwaves?

Back

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Card 10

Front

what chemicals stop infra red radiation?

Back

Preview of the front of card 10

Card 11

Front

what chemicals stop x rays and gamma rays?

Back

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Card 12

Front

name 4 sources of light pollution

Back

Preview of the front of card 12