Carbon and Nitrogen Cycle Quiz

ALL living things contain...

• Carbon

• Water

• Nitrogen

• All of the above

Our atmosphere is mostly...

• Carbon Dioxide

• Oxygen

• Nitrogen

• Water Vapor

Which is NOT part of the carbon cycle?

• Transpiration

• Respiration

• Combustion

• Decomposition

Which statement best describes the role of photosynthesis and respiration in the carbon cycle?

• Respiration and photosynthesis both add carbon to the atmosphere

• Respiration and photosynthesis both remove carbon from the atmosphere

• Respiration adds carbon to the atmosphere, while photosynthesis removes it

• Photosynthesis adds carbon to the atmosphere, while respiration removes it.

What affect will an increase in producers have on the carbon cycle?

• More carbon will be removed from the atmosphere

• More carbon will be added to the atmosphere

• Less carbon will leave the atmosphere

• Less carbon will be added to the atmosphere

Burning fossil fuels adds carbon dioxide to the atmosphere through...

• Combustion

• Photosynthesis

• Respiration

• Decomposition

Other than carbon dioxide, what other gas is exchanged through photosynthesis and respiration

• Nitrogen

• Oxygen

• Hydrogen

• Both Nitrogen and Oxygen

Why are nitrogen-fixation bacteria so important to plants?

• Plants eat them as food

• They remove harmful forms of nitrogen from the soil

• They decompose dead plants

• They convert atmospheric nitrogen into a form plants can use

Which process returns nitrogen to the air?

• Nitrification

• Nitrogen-Fixation

• Assimilation

• Denitrification

The nitrogen cycle cannot function without which organism?

• Plants

• Animals

• Bacteria

• Fungi