Carbon and Nitrogen Cycles

Front

What is the carbon cycle?

Back

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

Front

What process do plants use to absorb carbon dioxide?

Back

Photosynthesis is the process by which plants absorb carbon dioxide from the atmosphere and convert it into glucose and oxygen using sunlight.

Front

What is respiration in the context of the carbon cycle?

Back

Respiration is the process by which living organisms, including animals and plants, convert glucose and oxygen into energy, releasing carbon dioxide back into the atmosphere.

Front

What role do decomposers play in the carbon cycle?

Back

Decomposers break down dead organic matter, returning carbon to the soil and atmosphere, thus playing a crucial role in recycling nutrients.

Front

What is combustion and how does it affect the carbon cycle?

Back

Combustion is the process of burning fossil fuels or biomass, which releases carbon dioxide into the atmosphere, contributing to greenhouse gas emissions.

Front

What is the nitrogen cycle?

Back

The nitrogen cycle is the process by which nitrogen is converted between its various chemical forms, including nitrogen fixation, nitrification, denitrification, and ammonification.

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 the soil, making it available for plants.

Front

What is the role of nitrifying bacteria in the nitrogen cycle?

Back

Nitrifying bacteria convert ammonia into nitrites and then into nitrates, which are forms of nitrogen that plants can absorb and use.

Front

What is denitrification?

Back

Denitrification is the process by which nitrates are converted back into nitrogen gas (N2) by bacteria, returning nitrogen to the atmosphere.

Front

How do human activities impact the carbon cycle?

Back

Human activities, such as burning fossil fuels and deforestation, increase carbon dioxide levels in the atmosphere, contributing to climate change.