Greenhouse Effect

What is the greenhouse effect?

• The trapping of heat by Earth's surface

• The trapping of heat by gases in Earth's atmosphere

• The reflection of sunlight away from Earth

• The warming of space by Earth's heat

Which of the following gases are mentioned as greenhouse gases in the passage?

• Oxygen and nitrogen

• Carbon dioxide, methane, and water vapor

• Helium, nitrogen, and argon

• Carbon monoxide, ozone, and nitrogen dioxide

What happens to some of the Sun’s energy that does not pass through the atmosphere?

• It heats the Earth's surface

• It is reflected back into space

• It is absorbed by water vapor

• It is converted into greenhouse gases

What role do greenhouse gases play in the atmosphere?

• They block all sunlight from reaching Earth

• They cool the atmosphere by reflecting heat

• They create oxygen for life on Earth

• They trap heat and prevent it from escaping into space

What is global warming as described in the passage?

• A natural process that keeps the Earth warm

• A phenomenon where the Earth's climate becomes cooler over time

• An increase in Earth's temperature due to rising levels of greenhouse gases

• The trapping of energy by water vapor

Which of the following describes the energy flow in the greenhouse effect?

• Energy enters the atmosphere, heats the Earth, and all energy escapes into space

• Energy enters the atmosphere, reflects back, and warms the Sun

• Energy enters the atmosphere, warms the Earth, and some energy is trapped by greenhouse gases

• Energy enters the atmosphere and stays in the Sun

What would happen without the greenhouse effect?

• Earth’s climate would remain stable

• Earth would be much colder

• Earth would be warmer than it is now

• There would be no atmosphere

What is the primary cause of the enhanced greenhouse effect mentioned in the passage?

• Natural processes on Earth

• An increase in greenhouse gases due to human activities

• The depletion of the ozone layer

• A decrease in water vapor in the atmosphere

What happens to much of the energy that leaves the Earth’s surface?

• It is reflected back to Earth by greenhouse gases

• It escapes immediately into space

• It stops at the ozone layer

• It is absorbed by the Sun

What are the three greenhouse gases mentioned in the passage?