Whole Topic Checklist

• Describe the composition of gases in the Earth's atmosphere using percentages, fractions or ratios
•  Describe how early intense volcanic activity may have helped form the early atmosphere and how the oceans formed
•  Explain why the levels of carbon dioxide in the atmosphere changes as the oceans were formed
•  State the approximate time in Earth's history when algae started producing oxygen and describe the effects of a gradually increasing oxygen level
•  Explain the ways that atmospheric carbon dioxide levels decreased
•  Name some greenhouse gases and describe how they cause an increase in Earth's temperature
•  List some human activities that produce greenhouse gases
•  Evaluate arguments for and against the idea that human activities cause a rise in temperature that results in global climate change
•  State some potential side effects of global climate change, including discussing scale, risk and environmental implications
•  Define the term carbon footprint and list some actions that could reduce the carbon footprint
•  Describe the combustion of fuels as a major source of atmospheric pollutants and name the different gases that are released when a fuel is burned
•  Predict the products of combustion of a fuel given appropriate information about the composition of the fuel and the conditions in which it is used
•  Describe the properties and effects of carbon monoxide, sulfur dioxide and particulates in the atmosphere
•   Describe and explain the problems caused by increased amounts of these pollutants in the air

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