Amoeba Sisters Carbon and Nitrogen Cycles

What is the main benefit of a rotating compost bin?

• It makes composting faster.

• It helps in aeration.

• It keeps pests away.

• It reduces smell.

What key human activity does the video highlight as increasing atmospheric carbon dioxide by moving carbon out of reservoirs?

• Deforestation for agriculture

• Burning of fossil fuels

• Industrial nitrogen fixation

• Over-fishing of marine environments

Why is carbon considered versatile?

• It can be found in water.

• It is always a gas.

• It forms only one type of compound.

• It can exist as both graphite and diamond.

What is a carbon reservoir?

• A place where carbon is stored.

• A type of plant.

• A form of carbon dioxide.

• A type of fossil fuel.

When the video shifts to nitrogen, why is nitrogen described as “essential for life”?

• Because nitrogen is the main component of cell membranes

• Because nitrogen forms amino acids and nucleotides in living organisms

• Because nitrogen directly powers cellular respiration in mitochondria

• Because nitrogen is the only element that organisms cannot obtain from the atmosphere

How is nitrogen made usable for plants?

• By bacteria fixing it into ammonia.

• Through the process of photosynthesis.

• By being dissolved in water.

• By being stored in rocks.

What can happen if too much nitrogen from fertilizers enters water bodies?

• It reduces the water temperature.

• It helps fish grow faster.

• It causes excessive plant growth.

• It makes the water clearer.