Carbon/Nitrogen/Symbiosis

Which of the following add carbon dioxide to the atmosphere?

• volcanoes
• combustion of fossil fuels
• animal and plant respiration
• all of these

Plants absorb (a)   and release oxygen.

• Carbon dioxide
• Carbon monoxide
• Vitamin X
• Oxygen

Which of the following release carbon into the atmosphere? (Select all correct answers)

• Forest fires

• Burning fossil fuels

• Photosynthesis

• Human and other animals breathing out CO2

When nitrogen gas is turned in to a form that plants and animals can use is called 

• Combustion
• Photosynthesis
• Decomposition
• Nitrogen Fixation

Michael and Charlotte noticed a strange green layer covering the surface of the local beach. What happens when too much Nitrogen finds its way to the ocean?

• Algae Bloom

• Acid Precipitation

• Nitrogen Fixation

• Decomposition

What is the name of the process that reduces nitrates (NO3-) to nitrogen gas (N2), thus restoring N2 to the atmosphere?

• Nitrogen fixation

• Deamination

• Denitrification

• Nitrification

What is the process by which carbon is released from fossil fuels and returned to the atmosphere?

• Decomposition

• Combustion

• Photosynthesis

• Evaporation

What is the role of decomposers in the carbon cycle?

• Decomposers break down dead organisms and waste materials, releasing carbon back into the atmosphere as carbon dioxide.

• Decomposers play no role in the carbon cycle.

• Decomposers release carbon directly into the soil without affecting the atmosphere.

• Decomposers convert carbon dioxide into oxygen through photosynthesis.

Proteins are made of which of the following elements? Select all that apply.

• Carbon

• Hydrogen

• Oxygen

• Nitrogen

What is the correct equation for cellular respiration?

• 6O₂ + C₆H₁₂O₆ -> 6CO₂ + 6H₂O + Energy
• 6O₂ + C₆H₁₂O₆ + Energy -> 6CO₂ + 6H₂O
• 6CO₂ + 6H₂O -> 6O₂ + C₆H₁₂O₆ + Energy
• 6CO₂ + 6H₂O + Energy -> 6O₂ + C₆H₁₂O₆