Biogeochemical Cycles

Front

What is a biogeochemical cycle?

Back

A biogeochemical cycle is the movement of elements and compounds through living organisms (bio), geological processes (geo), and chemical processes (chemical) in the environment.

Front

What are the main components of the water cycle?

Back

The main components of the water cycle include evaporation, condensation, precipitation, and infiltration.

Front

What is transpiration in plants?

Back

Transpiration is the process by which plants lose water vapor through small openings in their leaves called stomata.

Front

How do plants obtain nitrogen?

Back

Plants obtain nitrogen primarily through the soil in the form of nitrates and ammonium, which are produced by the decomposition of organic matter.

Front

What role do bacteria play in the nitrogen cycle?

Back

Bacteria play a crucial role in the nitrogen cycle by fixing atmospheric nitrogen into usable forms for plants and by decomposing organic matter to release nitrogen back into the soil.

Front

What is the difference between a nutrient cycle and a biogeochemical cycle?

Back

A nutrient cycle specifically refers to the movement of nutrients (like nitrogen, phosphorus, and potassium) through ecosystems, while a biogeochemical cycle encompasses the broader movement of elements and compounds through biological, geological, and chemical processes.

Front

Which nutrient is not cycled through the atmosphere?

Back

Phosphorus is not cycled through the atmosphere; it primarily cycles through soil, water, and living organisms.

Front

What is the significance of the carbon cycle?

Back

The carbon cycle is significant because it regulates the levels of carbon dioxide in the atmosphere, which is essential for photosynthesis and maintaining Earth's climate.

Front

What is the process of nitrogen fixation?

Back

Nitrogen fixation is the process of converting atmospheric nitrogen (N2) into ammonia (NH3) or related compounds in soil, making it available for plant uptake.

Front

How does lightning contribute to the nitrogen cycle?

Back

Lightning contributes to the nitrogen cycle by providing the energy needed to convert atmospheric nitrogen into nitrogen oxides, which can then be absorbed by plants.