Greenhouse gases | Exit Quiz | Oak National Academy

Which of the following are greenhouse gases?

• methane

• carbon dioxide

• water vapour

• nitrogen

• sulfur dioxide

Answer explanation

Methane, carbon dioxide and water vapour are all greenhouse gases.

Which of the following human activities have led to increased levels of greenhouse gases?

• combustion of fossil fuels

• photosynthesis

• deforestation

• cattle farming

• landfill sites

Answer explanation

Combustion of fossil fuels, deforestation, cattle farming and landfill sites all lead to increased levels of greenhouse gases.

How does the infrared radiation emitted from the Earth's surface differ from the infrared radiation emitted from the Sun?

• it is a longer wavelength

• it is shorter wavelength

• it is a higher frequency

• it is a lower frequency

Answer explanation

The infrared radiation emitted from Earth's surface is a longer wavelength and a lower frequency than the radiation emitted from the Sun.

What do greenhouse gases do?

• absorb lower frequency IR radiation and radiate in all directions

• absorb higher frequency IR radiation and radiate in all directions

• absorb lower frequency UV radiation and radiate in all directions

• absorb higher frequency UV radiation and radiate in all directions

Answer explanation

Greenhouse gases absorb lower frequency IR radiation and radiate in all directions warming the lower atmosphere.

Which of the following statements about the greenhouse effect are true?

• it is a natural phenomenom

• it is essential for life on Earth

• it produces greenhouse gases

• it helps maintain a stable temperature on Earth

Answer explanation

The greenhouse effect is a natural phenomenon that maintains a stable temperature on Earth that is essential for life.

What key term is used to describe an increase in Earth's average temperature?

Answer explanation

Global warming is an increase in Earth's average temperature.