CARBON CYCLE

Carbon enters the living world through the process of _____.

• Photosynthesis

• Respiration

• Combustion

• Decomposition

The process of burning is called _____

• decay

• decomposition

• combustion

Burning fossil fuel has which effect in the carbon cycle?

• It removes carbon dioxide from the atmosphere.

• It puts carbon dioxide under the ground.I

• It adds carbon dioxide to the atmosphere

• It has no effect in the carbon cycle.

Which process takes carbon dioxide out of the atmosphere?

• respiration

• photosynthesis

• decomposition

• combustion

What does NOT produce carbon dioxide?

• Photosynthesis

• Burning Fossil Fuels

• respiration

• Plants decaying

TRUE or FALSE?

All of the carbon in existence is continually recycled in the carbon cycle.

• True

• False

Organisms that do not decompose can be buried and become what?

• water

• Fossil fuels

• nutrients

The average temperature of the surface of Earth has increased approximately 1°C in the past century. Which reason best explains this increase in temperature?

• lower levels of ozone in the atmosphere

• lower levels of nitrogen in the atmosphere

• higher levels of oxygen in the atmosphere

• higher levels of carbon dioxide and other greenhouse gases in the atmosphere

What is Carbon?

• An element that is part of air, rocks, soil, and living things.

• An element that is part of air, rocks, water, soil, and living things.

• An element that is part of the ground, water, and air.

• POisonous gases

Fossil fuel emissions release carbon into the atmosphere, this is an example of?

• carbon sink

• carbon source