Biogeochemical Cycles Review

Front

What is the water cycle?

Back

The repeated movement of water between Earth’s surface and the atmosphere, involving processes such as evaporation, condensation, and precipitation.

Front

Who primarily carries out nitrogen fixation?

Back

Bacteria, which convert atmospheric nitrogen into forms usable by plants.

Front

Which gas contributes most to the greenhouse effect?

Back

CO2 (carbon dioxide) is the primary greenhouse gas contributing to global warming.

Front

What are the reactants for photosynthesis?

Back

CO2 (carbon dioxide), H2O (water), and sunlight are required for photosynthesis.

Front

What does a biogeochemical cycle explain?

Back

The flow of chemical elements between living organisms and the environment.

Front

What is evaporation in the water cycle?

Back

The process by which water changes from a liquid to a gas, rising into the atmosphere.

Front

What role do plants play in the carbon cycle?

Back

Plants absorb CO2 from the atmosphere during photosynthesis, helping to regulate carbon levels.

Front

What is the significance of decomposers in biogeochemical cycles?

Back

Decomposers break down dead organic matter, returning nutrients to the soil and making them available for plants.

Front

Define nitrogen fixation.

Back

The process of converting atmospheric nitrogen (N2) into ammonia (NH3) or related compounds in soil, primarily by bacteria.

Front

What is the greenhouse effect?

Back

The warming of Earth’s surface due to the trapping of heat by greenhouse gases in the atmosphere.