Carbon Cycle

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

Combustion is another word for _______________.

Back

burning

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

In what process is Carbon transformed into chemical energy? Options: Photosynthesis, Respiration, Primary Production, Secondary Production

Back

Photosynthesis

Front

Which is a true statement?
Options:

Humans depend on oxygen, plants depend on carbon dioxide

,

Plants produce carbon dioxide

,

Humans depend on carbon dioxide, plants depend on oxygen

,

Humans don't depend on plants for the air they need

Back

Humans depend on oxygen, plants depend on carbon dioxide

Front

How do plants affect the air that animals and people breathe?

Back

Plants take in carbon dioxide and release oxygen