Question 1

State whether ozone in the troposphere is beneficial or harmful, and give one reason.

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Question 2

A student confuses the greenhouse effect with the ozone layer. Outline one key difference between them.

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Question 3

State which layer of the atmosphere contains most ozone that protects life on Earth.

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Question 4

Define the term ozone-depleting substance (ODS).

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Question 5

State one example of an ozone-depleting substance.

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Question 6

A doctor in a high-UV region advises extra eye protection. Outline how increased UV-B can affect human health.

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Question 7

Define the term Montreal Protocol.

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Question 8

State one reason the Montreal Protocol is often considered successful.

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Question 9

A student says: “CFCs destroy ozone because they are acidic.” State whether this is correct and justify your answer.

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Question 10

Define the term ozone layer.

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Question 11

Table 1 shows average ozone values over Antarctica in three years. Using the data, identify the trend.

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Question 12

A beach resort reports a rise in sunburn cases during summer. Explain why UV-B radiation is more harmful than UV-A.

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Question 13

A developing country was given longer deadlines to phase out CFCs. Outline why this “differentiated responsibility” approach can improve cooperation.

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Question 14

A coastal fishery notices lower numbers of juvenile fish after a period of higher UV levels. Suggest one ecological reason this could happen.

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Question 15

Explain one role of the Multilateral Fund in the Montreal Protocol.

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Question 16

A company claims: “Because of the Montreal Protocol, the ozone hole has already fully disappeared.” State whether this is correct and justify your answer.

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Question 17

Table 1 shows ozone-depleting substance use before and after the Montreal Protocol. Using the data, calculate the percentage reduction.

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Question 18

Outline one co-benefit of the Montreal Protocol for climate change mitigation.

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Question 19

Suggest one limitation or ongoing challenge for the Montreal Protocol.

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Question 20

A science class draws the ozone formation cycle. Explain how ozone is formed in the stratosphere.

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Topic 6.4: Stratospheric Ozone Questions

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