The Carbon Cycle

Front

The circulation of the element Carbon among Earth's atmosphere, land, oceans, and organisms is called _____________.

Back

the Carbon Cycle

Front

_____________ is an essential element of all living creatures.

Back

Carbon

Front

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

Back

planting trees

Front

Combustion is another word for _______________.

Back

burning

Front

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

Back

decomposition and respiration

Front

What process do plants use to absorb carbon dioxide from the atmosphere?

Back

Photosynthesis

Front

What is the role of decomposers in the carbon cycle?

Back

Decomposers break down dead organisms, returning carbon to the soil and atmosphere.

Front

What human activities increase carbon dioxide levels in the atmosphere?

Back

Burning fossil fuels, deforestation, and industrial processes.

Front

What is the greenhouse effect?

Back

The trapping of heat in the Earth's atmosphere by greenhouse gases like CO2.

Front

What is carbon sequestration?

Back

The process of capturing and storing atmospheric carbon dioxide.