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Questions and Answers
Which of the following is a characteristic of the Earth's atmosphere?
Which of the following is a characteristic of the Earth's atmosphere?
- It is composed of 78% nitrogen and 21% oxygen (correct)
- It is composed of 50% nitrogen and 50% oxygen
- It is composed of 60% nitrogen and 40% oxygen
- It is composed of 90% nitrogen and 10% oxygen
Which of the following is a non-renewable source of energy?
Which of the following is a non-renewable source of energy?
- Wind power
- Natural gas (correct)
- Solar power
- Hydroelectric power
What is the function of the ozone layer in the atmosphere?
What is the function of the ozone layer in the atmosphere?
- It traps heat and warms the Earth's surface
- It is responsible for the formation of clouds
- It absorbs harmful ultraviolet (UV) radiation from the sun (correct)
- It regulates the Earth's climate
Which of the following is a renewable source of energy?
Which of the following is a renewable source of energy?
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What is the primary cause of the greenhouse effect?
What is the primary cause of the greenhouse effect?
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Which layer of the atmosphere is responsible for protecting life on Earth from harmful ultraviolet radiation?
Which layer of the atmosphere is responsible for protecting life on Earth from harmful ultraviolet radiation?
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Study Notes
Characteristics of the Earth's Atmosphere
- The Earth's atmosphere has a characteristic that is unknown in the given options.
Types of Energy Sources
- Non-renewable source of energy: one that cannot be replenished in a short period of time, e.g. fossil fuels.
- Renewable source of energy: one that can be replenished naturally, e.g. solar, wind.
The Ozone Layer
- Function of the ozone layer: protects life on Earth from harmful ultraviolet (UV) radiation.
The Greenhouse Effect
- Primary cause of the greenhouse effect: trapping of heat by greenhouse gases, such as carbon dioxide and methane, in the atmosphere.
Atmospheric Layers
- The stratosphere is the layer of the atmosphere responsible for protecting life on Earth from harmful ultraviolet (UV) radiation.
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