C1 Air Quality - Evolution of the Atmosphere 0.0 / 5 ? ChemistryThe earth and its atmosphereGCSEOCR Created by: mollyyyyyyCreated on: 31-03-16 18:59 2796410518 Across 1. It cooled down and formed a ____. (5) 4. ____ _____ evolved over most of the Earth - happy in the CO2 atmosphere. (5, 6) 8. A lot of carbon dioxide _________ in oceans. (9) 9. When plants died and were buried, the carbon that was removed from the air became 'locked up' in ___________ rocks as insoluble carbonates and fossil fuels. (11) Down 1. Build up of oxygen killed off early organisms and allowed more _______ organsims to evolve. (7) 2. Oceans formed when ____ ______ condensed when the Earth cooled. (5, 6) 5. The Earth's surface was originally ______ for millions of years. (6) 6. The _________ gave out lots of gas - including carbon dioxide, water vapour and nitrogen - atmoshpere was formed. (9) 7. Green plants removed carbon dioxide from the atmosphere and produced oxygen by ______________. (14) 10. There is now virtually no ______ _______ left. (6, 7)
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