Unit 2: The Atmosphere - Gases in the Atmosphere 3.0 / 5 based on 2 ratings ? Environmental Science/StudiesThe AtmosphereAbundances of GasesGases in the AtmosphereASAQA Created by: rosieevieCreated on: 01-11-13 21:44 What percentage, on average, of the air is nitrogen? 78% 1 of 8 What is the formula of methane? CH4 2 of 8 Why has the percentage of oxygen increased from the early atmosphere to now? The photosynthesis of plants 3 of 8 Why has the percentage of hydrogen decreased from the early atmosphere to now? It's escaped from the atompshere 4 of 8 Why do carbon dioxide levels rise at night? Plants don't photosynthesise 5 of 8 Why does the rate of photosynthesis increase in the summer? Longer day hours and hotter weather 6 of 8 Why are the water vapour levels higher in summer? Hotter average temperatures and less average rainfall 7 of 8 How does nitrogen support life? Used as nutrients for plants 8 of 8
Comments
No comments have yet been made