Front

Which compound does NOT contain carbon atoms? Options:

carbon dioxide

,

ammonium

,

calcium carbonate

,

methane

Back

ammonium

Front

When humans burn fossil fuels, most of the carbon quickly enters the                       as carbon dioxide. Options: Water, Atmosphere, Sun, Air

Back

Atmosphere

Front

Which one of these does not add CO2 to the atmosphere? Options: cooking with gas, planting trees, burning wood, riding in a bus

Back

planting trees

Front

What does not produce carbon dioxide? Options: Photosynthesis, Burning Fossil Fuels, Animal respiration, Plants decaying

Back

Photosynthesis

Front

How do living organisms return carbon to the atmosphere in the carbon cycle?

Back

decomposition and respiration

Front

In the carbon cycle, producers take in the gas __

Back

carbon dioxide

Front

How does the carbon in grass become part of a lion?

Back

The carbon ends up in the lion's food chain. 

Front

Is all of the carbon in existence continually recycled in the carbon cycle?

Back

True

Front

Which of the following removes carbon from the atmosphere? Options: Combustion, Respiration, Photosynthesis, Death

Back

Photosynthesis

Front

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

Back

fossil fuels