BB Biogeochemical Cycle Final Review

The process of plants losing water through their leaves is called ____.

• condensation
• evaporation
• transpiration
• exhaling

What is the most abundant gas in the atmosphere?

• hydrogen
• oxygen
• helium
• nitrogen

Where are nitrogen-fixing bacteria found?

• In the soil
• Root nodules
• In dead things
• In the atmosphere

Where are denitrifying bacteria found?

• In the soil
• Root nodules
• In dead things
• In the atmosphere

The type of nitrogen that can be used by producers is called _____.

• free nitrogen
• nitrous oxide
• nitrogen gas
• nitrogen compounds

What happens during the process of denitrification?

• Nitrogen compounds turn into free nitrogen
• Free nitrogen turns into nitrogen compounds

What is the only process that removes carbon from the atmosphere?

• combustion
• cellular respiration
• photosynthesis
• decomposition

Which one of these is not a way that carbon cycles?

• Transpiration

• Photosynthesis

• Cellular Respiration

• Burning Fossil Fuels

What is the main thing that carries out Nitrogen Fixation?

• Lightning

• Bacteria

• Plants

• Humans

How do non-human living things affect the carbon cycle (fill in the blank/short answer)

• animals do cellular respiration

• plants do photosynthesis

• Fires release carbon into the atmosphere

• All of the above