Earth Science
How do glaciers move?
1. Gravity pulls them downhill. 2.Melted ice allows the glacier to slide forward.
How much of Earth's freshwater is locked away in glaciers and ice caps?
70%
Water leaves a lake through _____.
the ground
water table
top of the saturated zone in groundwater
aquifer
underground layer of permeable rock from which groundwater can be removed
Which of the following materials is the least porous?
unsorted sand and rock
Which of the following statements is true?
Groundwater adds water to lakes, rivers, and oceans.
Older glaciers have_______ ice crystals than younger glaciers.
Longer
Which of the following soil samples is the most porous?
Looks like big rocks all touching clear backround
Which of the following statements is true?
More of Earth's freshwater is found underground than in lakes.
Which of the following statements is true?
Older glaciers have longer ice crystals than younger ones.
permeable
allowing a fluid to pass through
porosity
amount of air space between soil or rock particles
A watershed is _____.
an area where all water drains into the same river system
Global warming _____.
causes the sea to rise, which can contaminate freshwater sources
The Dead Sea contains saltwater. Most of its water leaves through _____.
evaporation
The Arctic ice cap _____.
floats on top of the Arctic Ocean
Rivers ____.
flow downhill because of gravity
Glaciers _____.
form when snow stays in the same place for a long time
A confined aquifer is _____.
found between two impermeable layers
Which of the following is the most permeable?
gravel
Kettle lakes form when _____.
ice chunks break off a glacier, then melt
Macy is looking for groundwater. She will most likely find it _____.
in an area with limestone deposits
firn
intermediate stage between snow and ice
Groundwater _____.
is recharged by precipitation
moraine
large area of rock and sediment left by a glacier
ice cap
large, dome-shaped mass of ice
Most lakes were formed from _____.
melting glaciers
impermeable
not allowing a fluid to pass through
The water table _____.
rises and falls with precipitation
The beginning of a river is called the _____.
source
