Earth's Atmosphere and Ozone Layer Flashcard

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What is the ozone layer?

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A region of Earth's stratosphere that contains a high concentration of ozone (O3) and protects living organisms from harmful ultraviolet (UV) radiation.

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What is global climate change?

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A long-term change in the average weather patterns on Earth, often attributed to human activities such as burning fossil fuels.

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What are greenhouse gases?

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Gases in Earth's atmosphere that trap heat, including carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O).

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What is the primary function of the ozone layer?

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To absorb the majority of the sun's harmful ultraviolet (UV) radiation, protecting living organisms on Earth.

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What is the composition of Earth's atmosphere?

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Approximately 78% nitrogen, 21% oxygen, and trace amounts of other gases such as argon and carbon dioxide.

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What is the significance of the Montreal Protocol?

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An international treaty designed to phase out the production and consumption of ozone-depleting substances.

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What are the effects of UV radiation on human health?

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Increased risk of skin cancer, cataracts, and weakened immune system.

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What is the relationship between the ozone layer and climate change?

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While the ozone layer protects against UV radiation, climate change is primarily driven by greenhouse gas emissions.

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What is a 'hole' in the ozone layer?

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A region where the concentration of ozone is significantly lower than normal, often observed over Antarctica.

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How do chlorofluorocarbons (CFCs) affect the ozone layer?

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CFCs release chlorine atoms in the stratosphere, which can destroy ozone molecules.