C13 Earth's Atmosphere
- Created by: Lucy Hart
- Created on: 04-02-20 11:01
View mindmap
- C13 Earth's Atmosphere
- C13.1 History of the Atmosphere
- billions of years ago, intense volcanic activity released gases forming atmopshere + water vapour condensed into oceans
- CO2 which dissolved into water + carbonates reducing CO2
- lots of nitrogen, water vapour, methane + ammonia
- photosynthesis produced plants + algae therefore oxygen
- CO2 + H2O -> C6H1206 + 602
- animals evolved
- billions of years ago, intense volcanic activity released gases forming atmopshere + water vapour condensed into oceans
- C13.2 Our Evolving Atmosphere
- 80% nitrogen, 20% oxygen, traces of CO2, water vapour + noble gases
- ammonia + methane removed by reactions with oxygen
- photosynthesis + formation of fossil fuels reduced CO2
- 80% nitrogen, 20% oxygen, traces of CO2, water vapour + noble gases
- C13.3 Greenhouse Gases
- maintain temperatures high enough to support life
- carbon dioxide + methane
- earth absorbs short wavelength (ultraviolet), emits long wavelength (infrared)
- increasing short wavelength
- hard to predict effects of increasing greenhouse gases
- hard evidence - ice cores suggest higher levels of CO2
- C13.4 Global Climate Change
- carbon footprint - total amount of greenhouse gases emitted over the full life cycle of a product, service or event
- reduce by buying less clothes online + paper bags
- reduce greenhouse gases by reducing burning fossil fuels + using alternative sources of energy
- cost money so developed countries
- risks - increasing sea levels, threats to ecosystems + food production
- carbon footprint - total amount of greenhouse gases emitted over the full life cycle of a product, service or event
- C13.5 Atmospheric Pollutants
- combustion - carbon dioxide, nitrogen oxides, carbon monoxide, sulfur dioxide, particulates
- sulfur dioxide - sulfur impurities burnt, cause acid rain
- nitrogen oxides - nitrogen reacts with oxygen, causes respiratory problems
- carbon monoxide - incomplete combustion, poisonous
- particulates (soot) - burning diesel, causes global dimming
- hydrocarbons are oxidised forming carbon dioxide + water
- combustion - carbon dioxide, nitrogen oxides, carbon monoxide, sulfur dioxide, particulates
- C13.1 History of the Atmosphere
Comments
No comments have yet been made