Biogeochemical Cycle

The movement of a specific chemi­ cal through the living and nonliving components of the biosphere

• biogeochemical cycle
• carbon cycle
• oxygen cycle
• nitrogen cycle

What is mainly released by photosynthesis?

• Nitrogen
• Carbon
• Oxygen
• water

Where is most nitrogen found?

• in water
• the atmosphere
• the mantle
• antartica

How is carbon dioxide mainly distributed?

• animals and plants
• humans and animals
• water and humans
• humans and plants

What causes water to condesate agian and falls to the earth as precipitation?

• carbon cycle
• water cycle
• oxygen cycle 
• nitrogen cycle

What evaporates back into the atmosphere?

• nitrogen
• water
• carbon
• oxygen

The process of the water leaving plant leaves is called what?

• condensation
• perspiration
• transpiration
• ammensalism

Water from places like rivers or rain filled ditches goes back into the atmosphere through a process called what?

• evaporation
• condensation
• perspiration
• transpirition

Where is most of the world's carbon trapped?

• plants
• animals
• the atmosphere
• The ocean or underground

Bacteria living in the roots of legumes can absorbe nitrogen from the air and convert it into ammonia by which process?

• nitrogen fixation
• carbon fixation
• oxygen fixation
• hydrogen fixation