Unit 8A

Question 0

What percent of the water on earth salty

Answer 0

97%

Question 1

What percent of the water on earth is fresh liquid water

Answer 1

1%

Question 2

What percent of the water on earth is frozen as ice or snow

Answer 2

2%

Question 3

Define surface water

Answer 3

Surface water is above Earth’s surface in streams rivers lakes. it comes from precipitation or hot springs. it flows from higher to lower ground

Question 4

Define runoff (AKA storm water)

Answer 4

Water that flows across earths surface and can enter bodies of water

Question 5

Define groundwater

Answer 5

Some runoff and surface water seep into ground; drains through soil;filters down into underground rock ➡️ collects in spaces between rock particles.

Question 6

Most drinking water in United States comes from….

Answer 6

Groundwater

Question 7

How do you get groundwater

Answer 7

People drill down to the water table to reach reservoirs of groundwater

Question 8

Define water table

Answer 8

Upper surface of groundwater

Question 9

Define streams

Answer 9

Streams are formed by flowing water that does not seep below surface. This water forms channels as it erodes rock and soil

Question 10

Define channel

Answer 10

Path that the stream follows which gets wider and deeper overtime eroding rocks and soil

Question 11

Define tributary

Answer 11

Small stream that feeds into a river and eventually into a network of streams

Question 12

Define river system

Answer 12

Rivers that form from runoff

Question 13

Define floodplain

Answer 13

Flat low-lying area along the river that gets covered with water when the river overflows. building in floodplains can be dangerous because of the risk of frequent flooding

Question 14

Mouth/Delta

Answer 14

The end of the river where it meets a lake or ocean

Question 15

Define meander

Answer 15

A river that twist one way and goes the other way

Question 16

Define watershed

Answer 16

Area of land that is drained by river system in other word water from streams rivers floodplains lakes ponds wetlands and groundwater all contribute to the basin of water in a certain area

Question 17

Define divide

Answer 17

Original area of higher ground that separates one watershed from another

Question 18

What is the largest watershed in the world

Answer 18

Mississippi River watershed because it has hundreds of tributaries that extend from Rocky Mountains to Appalachian Mountains and down the length of United States from north to south

Question 19

Gradient

Answer 19

Measure of the change in elevation over a certain distance

Question 20

Rivers flow

Answer 20

Amount of water that moves through the river channel in a certain amount of time

Question 21

Stream load

Answer 21

Materials carried by stream

Question 22

Aquifer

Answer 22

Body of rock or sediment that stores groundwater

Question 23

Porosity

Answer 23

% of rock that has pores or open space

Question 24

Permeability

Answer 24

Measure if how easily water can flow through an aquifer

Question 25

Urbanization

Answer 25

Causing a greater need for fresh water

Question 26

Point source pollution

Answer 26

Comes from one pacific site

Question 27

Nonpoint pollution

Answer 27

No single point from which pollution comes

Question 28

Thermal pollution

Answer 28

Heating of water due to human activity

Question 29

Chemical pollution

Answer 29

Harmful chemicals are added to water supplies coming mainly from industry & agriculture/farming

Question 30

Biological pollution

Answer 30

When live or dead animals are added to water supplies causing bacteria in water

Question 31

Eutrophication

Answer 31

Increase in amount of nutrients in water due to decomposing organisms