Biogeochemical Cycles

Front

What is the Carbon Cycle?

Back

The Carbon Cycle is the process by which carbon is exchanged among the atmosphere, land, water, and living organisms. It involves processes such as photosynthesis, respiration, decomposition, and combustion.

Front

What is nitrogen-fixation?

Back

Nitrogen-fixation is the process by which free nitrogen (N2) in the atmosphere is converted into nitrogen compounds (like ammonia) that plants can use.

Front

What are the main processes of the water cycle?

Back

The main processes of the water cycle include evaporation, condensation, precipitation, and transpiration.

Front

Which process does NOT add CO2 to the atmosphere?

Back

Planting trees does not add CO2 to the atmosphere; instead, it helps to absorb CO2.

Front

What is the only process that removes carbon from the atmosphere?

Back

Photosynthesis is the only process that removes carbon dioxide from the atmosphere.

Front

Define evaporation in the context of the water cycle.

Back

Evaporation is the process by which water changes from a liquid to a gas (water vapor) due to heat.

Front

What role do plants play in the carbon cycle?

Back

Plants absorb carbon dioxide from the atmosphere during photosynthesis, converting it into organic matter.

Front

What is transpiration?

Back

Transpiration is the process by which water is absorbed by plant roots and then released as water vapor through pores in leaves.

Front

Explain the significance of decomposition in biogeochemical cycles.

Back

Decomposition breaks down dead organic matter, returning nutrients to the soil and releasing carbon back into the atmosphere.

Front

What is the role of bacteria in the nitrogen cycle?

Back

Bacteria play a crucial role in the nitrogen cycle by converting nitrogen gas into ammonia (nitrogen-fixation) and by converting ammonia into nitrates (nitrification).