Carbon Cycle

Front

Oxygen exists in the atmosphere as which state of matter? Options: solid, liquid, gas, plasma

Back

gas

Front

In the nonliving environment, carbon exists as a gas in _____ (cells, geosphere, atmosphere).

Back

atmosphere

Front

Earth has a fixed amount of _____ (Options: trees, carbon, carbon dioxide).

Back

carbon

Front

Carbon enters the living world through the process of _____. Options: photosynthesis, respiration, combustion, decomposition

Back

photosynthesis

Front

In the atmosphere, carbon attaches to oxygen to form _____.

Back

CO₂ 

Front

The process of burning is called _____ (Options: decomposition, combustion, respiration).

Back

combustion

Front

In this diagram, how many ways can carbon enter the living world?

Back

one

Front

Burning fossil fuel has which effect in the carbon cycle?

Back

It adds carbon dioxide to the atmosphere.

Front

Burning fossil fuel has which effect in the carbon cycle?

Back

It adds carbon dioxide to the atmosphere.

Front

Which process takes carbon dioxide out of the atmosphere? Options: respiration, combustion, decomposition, photosynthesis

Back

photosynthesis