ENV - Unit 4: Human Impact Test Review

An area of land in which all of the water falling or flowing over it drains to the same location is a/an…

• watershed
• watertable
• river
• aquifer

Water that is located in the ground in the pores within rock is called…

• watershed
• surface water
• groundwater
• water cycle

An underground layer of permeable rock that holds groundwater which can be extracted by drilling a well.

• water table
• aquifer
• watershed
• river

How can surface pollutants contaminate groundwater?

• runoff with water and penetrate soil
• seep into ground and rock
• spread in aquifer to contaminate large areas
• all answers are correct

How do people extract groundwater?

• groundwater cannot be extracted
• by drilling wells and pumping water out of the ground
• mining water from the Earth
• answer not shown

What do you call the area where water is stored behind a dam?

• reservoir

• generator

• refuge

• turbine

What happens when water flows through a dam?

• The water evaporates.

• The water turns a turbine.

• The water is pumped back up.

• The water creates sparks making electricity.

How much of the Earth is freshwater?

• 1%

• 3%

• 97%

• 90%

Which uses more water?

• Agriculture

• Industry

Answer explanation

70% of global water use is agricultural

Often water must be treated to become _______, safe to drink

• pathogen

• potable

• clarified

• bonifide