Water

Explain the relationship between plant cover and wind erosion.

• Plant cover increases wind erosion
• Plant cover reduces wind erosion
• Plant cover does not affect wind erosion
• Wind erosion increases where soil is covered by grass.

Which river would cause the most erosion? -Gradient (slope)  -Discharge (amount of water)

• Low gradient, high discharge,
• High gradient, low discharge
• High gradient, high discharge
• Low gradient, low discharge

How much fresh water is available for humans to use?

• 97%
• 3%
• 1%
• less than 1%

What happens during evaporation?

• temperature of water decreases and it turns from a gas to a liquid
• temperature of water increases and it turns from a gas to a liquid
• temperature of water decreases and it turns from a liquid to a gas
• temperature of water increases and it turns from a liquid to a gas

Why does precipitation fall?

• water turns into water vapor
• temperature increases
• clusters of water molecules become too heavy
• clouds are too high in the atmosphere

The energy that drives the water cycle comes from _________.

• the moon
• the wind
• the sun
• gravity

The part of the water cycle where a liquid turns into a gas, or vapor?

• evaporation
• precipitation
• condensation
• transpiration

During the water cycle. when water vapor changes to liquid water, it is called ___________.

• evaporation
• condensation
• freezing
• boiling

Which of the following is a way to conserve water?

• taking shorter showers
• turning off the water while you brush your teeth
• washing only full loads of dishes
• all of the above

A land area in which surface runoff drains into a river system is called an 

• Aquifer
• Watershed
• Zone of Saturation
• Zone of Aeration