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