Freshwater

ice chunks break off a glacier, then melt

Kettle lakes form when _____.

Sorted soil

arranges particles by size and is more porous

found between two impermeable layers

A confined aquifer is _____.

an area where all water drains into the same river system

A watershed is ________.

sit above an impermeable layer and below a permeable one

An unconfined aquifer _____.

form when snow stays in the same place for a long time

Glaciers ________.

Gravity pulls them downhill, Melted ice allows the glacier to slide forward.

How do glaciers move?

70%

How much of Earth's freshwater is locked away in glaciers and ice caps?

87%

How much of Earth's surface freshwater is found in lakes?

underground

More of Earth's freshwater is found ______ than in lakes.

melting glaciers

Most lakes were formed from _____.

in an area with limestone deposits

Most likely place to find groundwater

longer

Older glaciers have _____ ice crystals than younger glaciers.

can cause the sea level to rise and contaminate freshwater sources

Retreating ice ________.

flow downhill because of gravity

Rivers _______.

floats on top of the Arctic Ocean

The Arctic ice cap _______.

evaporation

The Dead Sea contains saltwater. Most of its water leaves through _____.

source

The beginning of a river is called the _____.

the ground

Water leaves a lake through _____.

gravel

Which of the following is the most permeable?

unsorted sand and rock

Which of the following materials is the least porous?

Groundwater adds water to lakes, rivers, and oceans.

Which of the following statements is true?

tributary

a small creek or stream that feeds a larger river or lake

permeable

allowing a fluid to pass through

porosity

amount of air space between soil or rock particles

watershed

area of land where all the draining water goes into the same river system

firn

intermediate stage between snow and ice

moraine

large area of rock and sediment left by a glacier

ice cap

large, dome-shaped mass of ice

impermeable

not allowing a fluid to pass through

groundwater

recharged by precipitation

The water table

rises and falls with precipitation

water table

top of the saturated zone in groundwater

aquifer

underground layer of permeable rock from which groundwater can be removed