Biogeochemical Cycles Review

Front

Water molecules enter the atmosphere when they ________ from bodies of water. Options: precipitate, evaporate, condense, infiltrate

Back

evaporate

Front

During _____, water enters the atmosphere by evaporating from the leaves of plants.

Back

transpiration

Front

Examples of precipitation in the gas form include:

Back

vapor, humidity, and steam

Front

Human activities such as ____________ cycle carbon through the carbon cycle. Options: consumption, photosynthesis, burning fossil fuels, decay

Back

burning fossil fuels

Front

Plants use ____ to build organic molecules during _____.

Back

CO2; photosynthesis

Front

Where are the sources of carbon in the ocean? Options: respiration of large aquatic mammals, biomass reservoirs, limestone rock beds, shells and dissolved CO2

Back

shells and dissolved CO2

Front

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

Back

nitrogen fixation

Front

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

Back

denitrification

Front

The atmosphere is ______ nitrogen gas.

Back

78%

Front

Nitrogen fixing ______ live in the _____ or within _____ of plants.

Back

bacteria; soil; roots