Chemical Cycling Quick Review

What is the name of the process that plants use to remove carbon from the atmosphere?

• Respiration
• Photosynthesis
• Combustion
• Decomposition

How do living things return carbon to the atmosphere?

• Photosynthesis
• Decomposition
• Respiration
• Combustion

After what process does carbon begin to get stored as fossil fuels?

• Combustion
• Decomposition
• Photosynthesis
• Respiration

How does the carbon from fossil fuels get put into the atmosphere?

• Respiration
• Combustion
• Decomposition
• Photosynthesis

Which of these does not produce carbon dioxide?

• Burning fossil fuels
• Photosynthesis
• Respiration by animals
• Respiration by plants and algae

How else could you describe combustion?

• Freezing
• Warming
• Burning
• Mixing

How does carbon move from plants to animals?

• Combustion
• Consumption
• Circulation
• Decomposition

Where is carbon stored on the planet?

• Only in the atmosphere
• In rocks, the atmosphere, soils, sediments, fossil fuels, the ocean, and in living things
• Only in plants and algae
• It is never stored

What are the two ways that humans are contributing to the increase of CO2 in the atmosphere?

• Fossil fuel emissions & photosynthesis
• Photosynthesis & respiration
• Storing fossil fuels & respiration
• Respiration & fossil fuel emissions

What is the process where nitrogen is removed from the atmosphere?

• Nitrogen fixation
• Denitrification
• Precipitation
• Cellular respiration