The Greenhouse effect

Carbon dioxide, methane, and water all act as _____ that heat the earth.

• pollutants
• greenhouse gases
• ozone
• nitrogen oxides

Carbon dioxide, ​ (a)   , and water all act as greenhouse gases that ​ (b)   the earth. When heat that is radiated toward space from the earth is absorbed by a greenhouse gas, the gas re-radiates the heat in all directions.

• methane
• heat

Carbon dioxide, methane, and water all act as greenhouse gases that heat the earth. When heat that is radiated toward space from the earth is absorbed by a greenhouse gas, the gas re-radiates the heat in all directions. Instead of escaping into space, some of that heat travels toward the earth and warms it further. This process is called the greenhouse effect.

• The greenhouse effect
• Solar radiation absorption
• Ozone depletion

While the average global temperature has fluctuated in the past, it has remained relatively stable for several thousands of years. In recent years, however, it has begun to rise again.

• The average global temperature has been decreasing.
• The average global temperature has remained constant.
• The average global temperature has only fluctuated slightly.
• The average global temperature has been rising.

What is the carbon cycle?

• The carbon cycle is the way carbon is used in cooking food.
• The carbon cycle is a method of carbon storage in rocks.
• The carbon cycle refers to the process of carbon being created in factories.
• The carbon cycle is the natural process of carbon exchange between the atmosphere, land, water, and living organisms.

The burning of fossil fuels, such as (a)   , releases (b)   . The increase of this gas in the atmosphere is causing an (c)   that can disrupt the (d)   of the (e)   .

• petroleum
• carbon dioxide
• imbalance
• equilibrium
• carbon cycle

Which of the following are greenhouse gases?

• Carbon dioxide

• Methane

• Water vapor

• All answers are correct

Which of the following gases is most commonly associated with the greenhouse effect?

• Oxygen

• Carbon dioxide

• Argon

• Helium

Carbon dioxide is a (a)   , and the release of it into the atmosphere traps solar energy and increases the greenhouse effect, raising Earth's overall temperature, leading to large-scale (b)   (formally known as (c)   ).

• greenhouse gas
• climate change
• global warming

Global warming is also known as global climate change because the climate everywhere is changing (not necessarily warming.)

• True
• False