Carbon and Nitrogen Cycles

What is the primary benefit of composting biodegradable materials?

• Saving money on fertilizers

• Creating nutrient-rich material for plants

• Decreasing carbon footprint

• Reducing household waste

Why is carbon considered a versatile element?

• It can form many compounds

• It is the most abundant element on Earth

• It is the lightest element

• It only exists in solid form

What process releases carbon dioxide back into the atmosphere?

• Fossil fuel combustion

• Decomposition

• Cellular respiration

• Photosynthesis

What is a greenhouse gas mentioned in the video?

• Carbon dioxide

• Nitrogen

• Oxygen

• Methane

Why is too much carbon dioxide in the atmosphere considered not a good thing?

• It reduces plant growth

• It increases oxygen levels

• It can trap too much heat in the atmosphere

• It depletes the ozone layer

What is the primary gas in Earth's atmosphere?

• Carbon dioxide

• Oxygen

• Hydrogen

• Nitrogen

Which organisms fix atmospheric nitrogen into a more usable form?

• Land plants

• Aquatic animals

• Algae

• Nitrogen-fixing bacteria

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

• They assimilate nitrogen into plant tissues

• They produce ammonia from decomposing matter

• They convert nitrates back into atmospheric nitrogen

• They fix atmospheric nitrogen

What is the consequence of excessive nitrogen from fertilizers draining into bodies of water?

• Reduction in water evaporation

• Increased air pollution

• Decreased soil fertility

• Excessive growth of aquatic producers

What can excessive nitrogen in water bodies lead to?

• Excessive growth of aquatic plants and algae

• Decreased aquatic life diversity

• Lower water temperatures

• Increased water clarity