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Climate Change
Quick questions on Causes of climate change explained: N(A)-Level Geography
7short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the natural greenhouse effect?Show answer
The greenhouse effect is natural and necessary. Some gases in the atmosphere, called greenhouse gases (such as carbon dioxide, methane and water vapour), trap part of the heat that the Earth radiates back toward space. This keeps the planet warm enough to live on. Without the natural greenhouse effect, the Earth would be far too cold for life.
What is natural causes of climate change?Show answer
The climate changes naturally over long periods because of:
What is human causes of climate change?Show answer
Human activities add extra greenhouse gases to the atmosphere:
What is the enhanced greenhouse effect?Show answer
The extra greenhouse gases from human activity trap more heat than before, so the atmosphere warms beyond its natural level. This strengthening of the greenhouse effect is called the enhanced greenhouse effect, and it is the main reason for the rapid warming seen over the last century. Carbon dioxide levels have risen sharply since people began burning large amounts of fossil fuels.
What is q1?Show answer
Name two greenhouse gases and a human activity that releases each. [2 marks]
What is q2?Show answer
Explain why the natural greenhouse effect is important for life on Earth. [2 marks]
What is q3?Show answer
Explain what is meant by the enhanced greenhouse effect. [2 marks]
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