Cycles

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

Does evaporation happen before or after condensation?

• before
• after
• during

What is it called when WATER is FORMED from an LIQUID to a WATER VAPOR Oor an [GAS]?

• EVAPORATION
• PRECIPITATION
• TRANSPIRATION

What is the next stage after EVAPORATION in the water cycle?

• CONDENSTATION
• GROUNDWATER

How much of the atmosphere is composed of nitrogen gas?

• 87%
• 38%
• 78%
• 21%

How do plants get the nitrogen they need?

• from the air
• from the soil or water in which they live
• from the Sun
• from broken-down rocks

Organisms that break down dead plants & animals and release nitrogen back into atmosphere...

• bacteria
• plants
• animals
• producers

This gas makes up 21% of the atmosphere

• ozone
• oxygen
• nitrogen
• water vapor