C1 - Clean air Flashcards
What are the main gases in clean air?
- nitrogen
- carbon dioxide
- oxygen
- water vapor
What do the level of gases in the air depend on?
- combustion of fossil fuels
- respiration
- photosynthesis
What are the percentages of the gases in the air?
- Nitrogen = 78%
- Oxygen = 21%
- Carbon Dioxide = 0.035%
How does photosynthesis change the level of oxygen?
It increases the amount of oxygen.
What is the word equation for respiration?
Glucose + Oxygen = Carbon Dioxide + Water
Why has the percentage of carbon dioxide increased slightly?
- deforestation ( less photosynthesis)
- increases population ( increase in energy requirements )
What is the process of degassing?
1) the original atmosphere contained ammonia and carbon dioxide
2) degassing of volcanoes produced an atmosphere of water and carbon dioxide
3) chemical reaction between ammonia and rocks produced nitrogen and water
4) carbon dioxide dissolved in the oceans
5) nitrogen increased because it is unreactive
6) organisms photosynthesized and oxygen increased
What are pollutants?
Pollutants are substances made by human activity that harm the environments.
What is the word equation for a catalytic converter?
Carbon Monoxide + Nitrogen Monoxide = Nitrogen + Carbon Dioxide
What is the balanced symbol equation for a catalytic converter?
2CO + 2NO = N2 + 2CO2
