Understanding Biogeochemical Cycles and Energy Pyramids

Front

What is a biogeochemical cycle?

Back

A biogeochemical cycle is the movement of elements and compounds through biological, geological, and chemical processes in the environment.

Front

What are the main components of the nitrogen cycle?

Back

The main components of the nitrogen cycle include nitrogen fixation, nitrification, assimilation, ammonification, and denitrification.

Front

How do nitrogen-fixing bacteria contribute to the nitrogen cycle?

Back

Nitrogen-fixing bacteria convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants.

Front

What is the role of autotrophs in the carbon cycle?

Back

Autotrophs, such as plants, absorb carbon dioxide (CO2) from the atmosphere and convert it into glucose through photosynthesis.

Front

What is the process of photosynthesis?

Back

Photosynthesis is the process by which green plants use sunlight to convert carbon dioxide and water into glucose and oxygen.

Front

How do consumers obtain carbon?

Back

Consumers obtain carbon by ingesting plants and other animals, which contain organic carbon compounds.

Front

What percentage of energy is typically lost at each trophic level in an energy pyramid?

Back

Typically, 90% of energy is lost as heat or used for survival at each trophic level.

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

What is the difference between a food chain and a food web?

Back

A food chain is a linear sequence of organisms through which energy and nutrients flow, while a food web is a complex network of interconnected food chains.

Front

What is cellular respiration?

Back

Cellular respiration is the process by which organisms convert glucose and oxygen into energy, carbon dioxide, and water.