Carbon Chemistry C1c 0.0 / 5 ? ChemistryClean airGCSEOCR Created by: gillian1132Created on: 25-02-17 17:11 What percentage of nitrogen is in the air? 78% 1 of 11 What percentage of oxygen is in the air? 21% 2 of 11 What percentage of carbon dioxide is in the air? 0.035% 3 of 11 What percentage of noble gases is in the air? 1% 4 of 11 How did the present day evolve? Original atmosphere came from gases escaping the Earth's interior, then photosynthesis by plants increased oxygen until it reached today's level. 5 of 11 What human factors increase the amount of carbon dioxide in the air? Deforestation an an increasing population 6 of 11 How does deforestation increase the carbon dioxide levels? If more trees are cut down, less photosynthesis takes place (so less CO2 is taken by plants) 7 of 11 How does an increasing population increase the CO2 levels? As the population increases, the world's energy requirement increases (carbon dioxide, combustion) 8 of 11 Why is important that atmospheric pollution is controlled? It can have negative effects on people's health 9 of 11 What does a catalytic converter do? It converts carbon monoxide into carbon dioxide 10 of 11 Where in a catalytic converter does the reaction between nitric oxide and carbon monoxide take place? On the surface of the catalyst 11 of 11
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