The Carbon Cycle Explained

The video explains the carbon cycle, highlighting carbon's presence in all living cells and its movement between the atmosphere, plants, animals, and microorganisms. It details how carbon dioxide is absorbed by plants during photosynthesis, incorporated into complex molecules, and transferred through food chains. The cycle continues as carbon is released back into the atmosphere through respiration and the burning of fossil fuels, completing the cycle.

What is the primary element found in all living cells?

• Nitrogen

• Carbon

• Hydrogen

• Oxygen

In what form is carbon present in the atmosphere?

• Carbon dioxide

• Methane

• Carbonate

• Carbon monoxide

What process do green plants use to remove carbon dioxide from the atmosphere?

• Respiration

• Transpiration

• Fermentation

• Photosynthesis

What do plants create using carbon during photosynthesis?

• Minerals

• Vitamins

• Complex molecules like proteins, fats, and carbohydrates

• Simple sugars

How does carbon move up the food chain?

• Through water absorption

• By being eaten by animals

• By decomposing

• Through soil absorption

What role do microorganisms play in the carbon cycle?

• They convert carbon into oxygen

• They produce carbon dioxide

• They decompose dead plants and animals

• They absorb carbon dioxide

What happens to carbon compounds in the soil?

• They evaporate

• They are taken up by plants as nutrients

• They remain unchanged

• They turn into fossil fuels

What is a waste product of respiration?

• Carbon dioxide

• Water

• Nitrogen

• Oxygen

Which process releases carbon dioxide into the atmosphere besides respiration?

• Photosynthesis

• Combustion of wood and fossil fuels

• Fermentation

• Transpiration

What is the final step in the carbon cycle?

• Carbon is absorbed by the soil

• Carbon is stored in fossil fuels

• Carbon is taken in by plants

• Carbon is released into the atmosphere