Biogeochemical cycles

Which is NOT a process of the water cycle?

• precipitation
• freezing
• transpiration
• evaporation

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

Why do living things need nitrogen?

• To get energy
• To make amino acids
• To make proteins
• To make proteins AND amino acids

Where are denitrifying bacteria found?

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

What happens during the process of denitrification?

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

Which is NOT a way that nitrogen compounds are added to the soil?

• Decay of dead organisms
• Denitrification
• Animal waste
• Nitrogen-fixation

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

• combustion
• cellular respiration
• photosynthesis
• decomposition

Where is carbon stored in the environment?

• Fossil fuels
• Wood of trees
• Calcium carbonate (shells and bones)
• All of the above

What 2 things does a plant make during photosynthesis?

• oxygen, glucose
• glucose, carbon dioxide
• useable energy, glucose
• oxygen, carbon dioxide