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

What happens during the process of nitrogen-fixation?

• process that converts nitrogen in the atmosphere into forms that are useful for most organisms.

• process that takes nitrogen from nitrates and other compounds in the soil and release them as Nitrogen gas.

How does carbon dioxide leave the atmosphere?

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

What is the water cycle?

• the 3 forms of water
• the movement of water on, above, or below the surface of the Earth
• when water melts
• when clouds form

What part of the water cycle does this picture show?

• condensation
• precipitation
• evaporation

Which of these is an example of precipitation?

• snow
• air
• clouds
• vapor

Which is the opposite of condensation?

• runoff
• evaporation
• precipitation
• transpiration

Which best explains why runoff is important?

• It returns water to other locations on Earth
• It increases the chance of flooding
• It makes evaporation occur faster
• It increases condensation