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Chem - Atmosphere

Chemistry - Atmosphere

QuestionAnswer
What is the atmosphere made of? 80% nitrogen, 20% oxygen & small amounts of other gases
What percentage of the atmosphere is nitrogen? about 80%
What percentage of the atmosphere is oxygen? about 20%
What happens to the atmosphere when we burn trees & fossil fuels? the concentration of carbon dioxide increases
What do fossil fuels contain a lot of? carbon
What is a 'carbon footprint'? the volume of greenhouse gases that are released over the life cycle of something
Combustion of fuels releases which 3 major pollutants into the air? Carbon particulates, carbon monoxide, sulphur dioxide & oxides of nitrogen
Why are carbon particulates bad? they lead to respiratory (breathing) problems & global dimming
What is 'global dimming'? less light reaching the earth
Why is carbon monoxide bad? sticks to haemoglobin in the blood & stops the blood carrying as much oxygen
Why is sulphur dioxide & oxides of nitrogen bad? they can react with cloud water to form acid rain
How long as the atmosphere been like this? 200 million years
Plants absorb carbon dioxide + water to produce glucose + oxygen - what is this called? photosynthesis
What gas is produced by cattle (cows) and increases the greenhouse effect? methane
What are the 'greenhouse gases'? Carbon dioxide, methane & water vapour
What is the 'greenhouse effect'? the greenhouse gases let in short wave radiation from the sun but does not allow the long wave radiation to leave the atmosphere - this keeps the planet warm.
What can 'global warming' lead to? climate change
Created by: samfitter
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