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6 Cards in this Set

  • Front
  • Back
  • 3rd side (hint)

Composition of the earths atmosphere

21% oxygen, 78% nitrogen, 1% other

2_% 7_% 1%

Carob on dioxide in the atmosphere

-trapped as fossil fuels


-turns to sedimentary rock

When was the Earth formed?

4500 million years ago

Photosynthesis effect on the atmosphere

Plants replaced CO2 with O2

Replaced....

Climate change- CO2 & O2

The general trend is that they are both constantly rising and falling

Fossil Fuels

CO2 is a combustion product

Product?