1a1 mark
This question is about the Earth’s atmosphere.
The Earth’s early atmosphere contained mostly carbon dioxide gas.
The Earth’s atmosphere today contains about 0.04% carbon dioxide.
Explain why the amount of carbon dioxide in the atmosphere today has decreased from the early atmosphere.
1b1 mark
The graph shows the amount of carbon dioxide in the Earth’s atmosphere from 1970 to 2010.
Describe the trend in the amount of carbon dioxide in the Earth’s atmosphere from 1970 to 2010.
1c2 marks
Many scientists believe that increasing amounts of carbon dioxide in the Earth’s atmosphere are causing global warming.
i)
Write down one way that carbon dioxide is released into the atmosphere.
[1]
ii)
Write down one way to reduce the amount of carbon dioxide that is released into the atmosphere.
[1]
1d2 marks
Sulfur dioxide is a pollutant found in many large cities.
Sulfur dioxide is an acidic gas.
i)
Suggest a value for the pH of sulfur dioxide.
[1]
ii)
Describe one problem caused by sulfur dioxide.
[1]
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