Ch. 11 Key Terms

Question 1

surface water

Answer 1

fresh water on Earth’s land surface. found in lakes, rivers, streams, and wetlands.

Question 2

river system

Answer 2

when streams and rivers move across the land and form a flowing network of water

Question 3

watershed

Answer 3

area of land that is drained by a river

Question 4

groundwater

Answer 4

water that is found beneath the earth’s surface in spaces in sediment and rock formations

Question 5

aquifer

Answer 5

an underground formation that contains groundwater

Question 6

porosity

Answer 6

a percentage of the total volume of a rock that has spaces ( pores )

Question 7

permeability

Answer 7

the ability of a rock or soil to allow water to flow through it

Question 8

recharge zone

Answer 8

an area of earth’s surface from which water percolates down into an aquifer

Question 9

potable

Answer 9

safe to drink

Question 10

pathogen

Answer 10

organisms that cause illness or disease

Question 11

dam

Answer 11

built across rivers to control the river’s flow

Question 12

reservoir

Answer 12

artificial lake

Question 13

desalination

Answer 13

the process of removing salt from saltwater

Question 14

water pollution

Answer 14

introduction of chemical, physical or biological agents into water that degrade water quality and harm the organisms that depend on the water.

Question 15

point-source pollution

Answer 15

pollution discharged from a single source

Question 16

nonpoint-source pollution

Answer 16

also, know as runoff pollution comes from many different sources that are often difficult to identify

Question 17

wastewater

Answer 17

water that contains waster from homes or industry

Question 18

artificial eutrophication

Answer 18

Eutrophication is accelerated when inorganic plant nutrients, such as phosphorus and nitrogen, enter the water from sewage and fertilizer runoff

Question 19

thermal pollution

Answer 19

it can occur when power plants and other industries use water in their cooling systems and then discharge the warm water into a lake or river

Question 20

biomagnification

Answer 20

Each organism stores the pesticide in its tissues and he concentration of the pesticide that is passed on the next organism in the foo chain increases