172. The Carbon and Oxygen Cycles

Match it! Select the correct answer from the pull down...Good luck!

During the process, ___________________, plants use carbon dioxide from the air and turn it into oxygen.

Carbon and Oxygen are constantly being recirculated between air, water, and _______________.

Carbon dioxide is produced through the ________________of animals.

Plants and animals work ______________to balance the oxygen and carbon cycles.

Oxygen lives in the atmosphere as a __________.

The process of living things decomposition releases ___________back into the air, or atmosphere.

Atmospheric oxygen comes mostly from _____________.

Carbon and Oxygen are elements and are_____________to life