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 gas makes up 75% of the atmosphere?

Back

Nitrogen.

Front

Which process is NOT part of the water cycle?

Back

Freezing.

Front

What is denitrification?

Back

Denitrification is the process by which bacteria convert nitrates (NO3-) and nitrites (NO2-) back into nitrogen gas (N2), returning it to the atmosphere.

Front

What element is released by the weathering of rocks?

Back

Phosphorus.

Front

Define the Water Cycle.

Back

The Water Cycle is the continuous movement of water on, above, and below the surface of the Earth, involving processes such as evaporation, condensation, precipitation, and infiltration.

Front

What is the role of photosynthesis in the Carbon Cycle?

Back

Photosynthesis is the process by which plants convert carbon dioxide (CO2) from the atmosphere into organic compounds, releasing oxygen as a byproduct.

Front

What is nitrogen fixation?

Back

Nitrogen fixation is the process by which atmospheric nitrogen (N2) is converted into ammonia (NH3) or related compounds in soil, making nitrogen available to plants.

Front

What is the significance of phosphorus in ecosystems?

Back

Phosphorus is essential for the formation of DNA, RNA, and ATP, and it plays a critical role in energy transfer and photosynthesis in plants.

Front

Explain the process of evaporation.

Back

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