Biogeochemical Cycles

What is this a picture of?

• Nitrogen cycle
• carbon cycle
• water cycle
• plant cycle

How does carbon dioxide leave the atmosphere?

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

Which process takes Carbon Dioxide from the air and converts it into a form of carbon used by living things?

• Precipitation
• Photosynthesis
• Respiration
• Bioremdiation

What is the most abundant gas in the atmosphere?

• hydrogen
• oxygen
• helium
• nitrogen

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

• condensation
• evaporation
• transpiration
• exhaling

Which is NOT a process of the water cycle?

• precipitation
• freezing
• transpiration
• evaporation

Where are denitrifying bacteria found?

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

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

Animals obtain the nitrogen they need directly from the

• soil in their habitat
• air they breathe
• plants they eat
• bacteria living within them