Biogeochemical Cycles 2024

How does carbon dioxide leave the atmosphere?

• Through transpiration
• Through photosynthesis
• Through factory emission
• Sunlight

Respiration is the process by which ____________ is consumed and _______________ is produced.

• Carbon, Oxygen
• Oxygen, Carbon dioxide
• H20, oxygen
• Carbon, H2O

Organisms use nitrogen to form

• carbohydrates and lipids
• proteins and lipids
• lipids and nucleic acids
• proteins and nucleic acids

The nitrogen found in the atmosphere is not in a form that plants or animals can use.  What converts it into a usable form?

• Bacteria
• Photosynthesis
• Decomposition of organisms
• Fungi

What does not produce carbon dioxide?

• Photosynthesis
• Burning Fossil Fuels
• Animal respiration
• Plants decaying

Identify the cycle pictured.

• The Water cycle
• The Carbon cycle
• The Nitrogen cycle
• This is not a correct diagram of any cycle.

A particular golf course is using large amounts of nitrogen fertilizer. What process could move this nitrogen into a local stream?

• volatilization
• nitrogen fixation
• runoff
• ammonification

How do animals get nitrogen?

• the atmosphere 
• eating other organisms
• rainwater
• lightning 

Which one of these does not add CO₂ to the atmosphere?

• cooking with gas

• planting trees

• burning wood

• riding in a bus

In the nitrogen cycle, the bacteria that replenish the atmosphere with N2 are

• Denitrifying bacteria

• Nitrogen-fixing bacteria

• Nitrifying bacteria

• Ammonifying bacteria