The atmosphere, climate and greenhouse gases

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What percentage of the earths atmosphere is nitrogen?
78%
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What percentage of the earths atmosphere is oxygen?
21%
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What percentage of the earths atmosphere is carbon dioxide?
0.04%
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What percentage of the earths atmosphere is argon%
0.93%
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What is the earths outer most layer called?
The crust
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What is the earths inner most layer called?
The core
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What is the earths middle layer called?
The mantle
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What is the core mostly made from?
Iron and nickel
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What is the state of matter of the inner core? Why?
Solid because of the high pressure
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How does the crust move around?
The convection currents cause some movement
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What state of matter is the mantle?
Thick liquid (viscus)
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What state of matter is the outer core?
Liquid
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How old is the earth and it's atmosphere?
4.6 billion years
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Hat process uses fossil fuels and is causing change in the amount of carbon dioxide in the atmosphere?
Combustion
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How can carbon dioxide get taken from the atmosphere?
Plants use it in photosynthesis, animals use it in respiration and it dissolves into oceans
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How does carbon dioxide get put back into the atmosphere?
It is given out by both plants and animals in respiration
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What do greenhouse gases do?
They maintain temperatures on earth so they are high enough to sustain life
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What are the main greenhouse gases?
Carbon dioxide, methane and water vapour
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What is the difference between complete and incomplete combustion?
Complete combustion happens when the is plenty of oxygen but incomplete combustion happens when there is not enough oxygen
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For most fuels what is the product of complete ombustion?
Carbon dioxide and water
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For most fuel what is the product of incomplete combustion?
Carbon monoxide and carbon
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What are particulates?
When big molecules react with oxygen and not burning properly. As a result, tiny particles containing carbon and unburnt hydrocarbons are produced
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What are causes of increase in greenhouse gases in the atmosphere?
Industry and factories, heating, transport, electricity and increase in population cause more people to be using these things
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What are some possible effects of climate change?
Stronger hurricanes, severe heat waves, acidic oceans, melting icecaps, rise of sea level, changes in food produce,
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How could carbon dioxide levels be reduced?
Plant more trees (respiration), using reduced carbon energy resources (wind power, solar power), burn less fossil fuels, use less electricity
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How was water vapour produced?
The heat in the atmosphere caused it
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How were oceans formed?
The water vapour condensed
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How did nitrogen appear?
Partly because of the reaction between ammonia and oxygen
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Why are carbon dioxide levels rising?
More fossil feuls are being burnt. This causes combustion and the product is carbon dioxide
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In the 1st billion years of theearths life, what was the atmosphere like?
It was like Mars' and Venus', mainly carbon dioxide and nitrogen was being built up by volcanic action
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What is a carbon footprint?
The total amount of carbon dioxide and greenhouse gases used over a full cycle of a product, service or event
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Card 2

Front

What percentage of the earths atmosphere is oxygen?

Back

21%

Card 3

Front

What percentage of the earths atmosphere is carbon dioxide?

Back

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Card 4

Front

What percentage of the earths atmosphere is argon%

Back

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Card 5

Front

What is the earths outer most layer called?

Back

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