C13 Earth's Atmosphere
The proportions of different gases in the atmosphere.
The Earth's early atmosphere
How did oxygen increase and when did this occur?
How did carbon dioxide decrease?
Greenhouse gases
Human activities which contribute to an increase in greenhouse gases in the atmosphere
Global climate change
The carbon footprint and its reduction
Atmospheric pollutants from fuels
Properties and effects of atmospheric pollutants
For 200 million years, the proportions of different gases in the atmosphere have been much the same as they are today; what are they? 
approximately when was the Earth formed?
what is one theory of how the early atmosphere developed (involving volcanoes and oceans)?
describe the main changes in the atmosphere over time and some of the likely causes of these changes
describe and explain the formation of deposits of limestone, coal, crude oil and natural gas
Name the three greenhouse gases
describe the greenhouse effect 
what two human activities increase
the amounts of carbon dioxide?
what two human activities increase
the amounts of methane?
1.
2.
1.
2.
Based on peer-reviewed evidence, many scientists believe that human activities will cause the temperature of the Earth’s atmosphere to increase at the surface and that this will result in global climate change
what is peer-review and why is it important?
why is it important to communicate results to a wide range of audiences?
describe briefly four potential effects of global climate change
1.
2.
3.
4.
discuss the scale of global
climate change
discuss the risk of global
climate change
discuss the environmental implications of global
climate change
what is the carbon footprint?
describe actions to reduce emissions of carbon dioxide and
methane
give reasons why actions to reduce emissions may be limited
what gases released into the atmosphere when a fuel is burned?
what else might be released that forms particulates in the atmosphere?
describe and explain the problems caused
by increased amounts of carbon monoxide in the air?
describe and explain the problems caused
by increased amounts of particulates in the air?
describe and explain the problems caused
by increased amounts of sulfur dioxide and oxides of nitrogen in the air?