G12 GEOGRAPHY A1

PART C: EXTENDED RESPONSE ASSESSMENT TASK 1 (5 MARKS)

QUESTION 13:
Explain how CFC gases affect the ozone layer. (3 marks)

QUESTION 14:
Define global warming. (2 marks)



Answer :

Final answer:

CFCs break down in the stratosphere, releasing chlorine atoms that lead to ozone depletion. Global warming is caused by the accumulation of greenhouse gases in the atmosphere, trapping heat and altering the Earth's climate.


Explanation:

CFCs (chlorofluorocarbons) affect the ozone layer by releasing chlorine atoms when they break down in the stratosphere. These chlorine atoms then lead to the destruction of ozone molecules in a catalytic chain reaction, resulting in ozone depletion.

Global warming is defined as the gradual increase in the Earth's overall temperature due to the accumulation of greenhouse gases in the atmosphere, primarily carbon dioxide, methane, and nitrous oxide, which trap heat and lead to climate change.


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