Chemistry

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Across
  1. 2. / Limestone is an example of this rock.
  2. 3. / Rocks that gradually wear away.
  3. 4. Vapour / Condensed and formed oceans.
  4. 6. Dioxide / The most amount of gas in the early atmosphere.
  5. 8. / Uses carbon dioxide from the atmosphere to produce oxygen.
  6. 9. / Shaped the surface of the earth.
  7. 11. / Granite is an example of this rock.
Down
  1. 1. / Marble is an example of this rock.
  2. 5. / What are made from grains that fit together.
  3. 7. / Pollutes the air and comes from farts and burps.
  4. 10. Fumes / Add carbon dioxide into the atmosphere faster than it can be removed.