Biogeochemical Cycles

Front

What is nitrogen fixation?

Back

The process by which certain bacteria convert atmospheric nitrogen (N2) into ammonia (NH3), making it available for plants.

Front

What is the most abundant gas in the atmosphere?

Back

Nitrogen, which makes up about 78% of the Earth's atmosphere.

Front

What process do plants use to convert carbon dioxide into glucose?

Back

Photosynthesis.

Front

What is combustion?

Back

The process of burning fossil fuels, which releases carbon dioxide (CO2) back into the atmosphere.

Front

What role do decomposers play in biogeochemical cycles?

Back

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

Front

What is the phosphorus cycle?

Back

The biogeochemical cycle that describes the movement of phosphorus through the lithosphere, hydrosphere, and biosphere.

Front

How do humans impact the carbon cycle?

Back

By burning fossil fuels, deforestation, and industrial activities, humans increase the amount of carbon dioxide in the atmosphere.

Front

What is assimilation in the context of biogeochemical cycles?

Back

The process by which plants and animals incorporate nutrients from the environment into their own tissues.

Front

What is the significance of the water cycle?

Back

The water cycle is essential for distributing water across the planet, supporting all forms of life.

Front

What is the role of bacteria in the nitrogen cycle?

Back

Bacteria are crucial for nitrogen fixation, nitrification, and denitrification, helping to convert nitrogen into forms usable by plants.