Biogeochemical Cycles Review

Front

The conversion of nitrogen from the soil into nitrogen gas is called _____

Back

denitrification

Front

The atmosphere is ______ nitrogen gas.

Back

78%

Front

The conversion of atmospheric nitrogen into a form used by plants is a process called _____

Back

nitrogen fixation

Front

Plants use ____ to build organic molecules during _____

Back

CO2; photosynthesis

Front

Most of the phosphorus in the biosphere is stored in ____

Back

rocks

Front

What is the process by which nitrogen is converted into ammonia by bacteria in the soil?

Back

ammonification

Front

What is the term for the movement of water through the environment, including evaporation, condensation, and precipitation?

Back

water cycle

Front

What is the primary source of phosphorus for plants?

Back

rocks and minerals

Front

What process do plants use to convert sunlight into chemical energy?

Back

photosynthesis

Front

What is the role of decomposers in biogeochemical cycles?

Back

They break down dead organic matter, returning nutrients to the soil.