I WONDER - Where Does Carbon Come From?

The video explains three main ways carbon is released into the environment: combustion, respiration, and decay. Combustion involves burning fossil fuels, trees, or plants, releasing carbon into the air. Respiration is a natural process where living beings convert oxygen into carbon dioxide, which is then exhaled. When plants and animals die, they decay, releasing carbon back into the earth or air, completing the carbon cycle.

What is released into the air when fossil fuels are burned?

• Nitrogen

• Carbon

• Hydrogen

• Oxygen

Which process involves converting oxygen into carbon dioxide?

• Combustion

• Photosynthesis

• Respiration

• Decay

What happens to carbon when plants and animals decay?

• It is released into the air or ground

• It becomes water

• It is absorbed by the sun

• It turns into oxygen

Which of the following is NOT a part of the carbon cycle?

• Decay

• Photosynthesis

• Respiration

• Combustion

What is the primary role of decay in the carbon cycle?

• To produce energy

• To release carbon back into the environment

• To create new plants

• To absorb sunlight