Earth Science

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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


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