Which layer of the atmosphere is closest to the Earth's surface?

• Stratosphere

• Mesosphere

• Troposphere

• Thermosphere

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DOK Level 2: Skill/Concept

What is the primary gas found in the Earth's atmosphere?

• Oxygen

• Carbon Dioxide

• Nitrogen

• Argon

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DOK Level 2: Skill/Concept

Which layer of the atmosphere contains the ozone layer?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

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DOK Level 2: Skill/Concept

What is the main cause of the greenhouse effect?

• Increase in oxygen levels

• Increase in carbon dioxide levels

• Decrease in nitrogen levels

• Increase in argon levels

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DOK Level 2: Skill/Concept

Which of the following is a consequence of ozone layer depletion?

• Increased greenhouse effect

• Increased ultraviolet radiation reaching the Earth

• Decreased global temperatures

• Increased oxygen levels

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DOK Level 2: Skill/Concept

Which of the following pollutants is primarily responsible for acid rain?

• Carbon monoxide

• Sulfur dioxide

• Methane

• Ozone

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DOK Level 2: Skill/Concept

What is the main human activity contributing to climate change?

• Deforestation

• Industrial emissions

• Agricultural practices

• All of the above

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DOK Level 2: Skill/Concept

Which layer of the atmosphere is known for its high temperatures due to solar activity?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

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DOK Level 2: Skill/Concept

What percentage of the Earth's atmosphere is composed of nitrogen?

• 21%

• 78%

• 0.03%

• 1%

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DOK Level 2: Skill/Concept

Which gas is most effective at trapping heat in the atmosphere?

• Nitrogen

• Oxygen

• Carbon Dioxide

• Argon

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DOK Level 2: Skill/Concept