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

What is an essential element of all living creatures? Options: Gold, Carbon, Carbon dioxide, Silver

Back

Carbon

Front

Is the total amount of carbon on Earth constant?

Back

True

Front

Carbon is used in the process called __________ by plants and algae to make food and the building blocks for growth.

Back

photosynthesis

Front

Bacterias that decompose dead plants release _____________ back into the atmosphere.

Back

carbon

Front

In the oceans; algae, plants, and other organisms use carbon from the atmosphere for ________________. Options: respiration, decomposition, transpiration, photosynthesis

Back

photosynthesis

Front

Organisms that die in the ocean may __________ to the bottom and form limestone rock over a period of time.

Back

sink

Front

Ocean coral and oysters use carbon to create _________. Options: oxygen, shells, leaves, food.

Back

shells

Front

Limestone is a type of rock created from the ______________ of dead sea organisms.

Back

shells

Front

Over ________________ of years, once-living matter that remains in the ground can transform into fossil fuels.

Back

millions