Earth Science Semester 2 - Quiz 2: Fresh Water

How much of Earth's freshwater is found underground?

30%

Lakes ______.

Are recharged by precipitation

Melinda lives in a larger, U-shaped valley. It was most likely formed by ______.

a glacier

A watershed is _____.

an area where all draining water goes into the same river system

Rivers _____.

change the landscape through erosion

In landlocked lakes, water is discharged primarily through ______.

evaporation

Glaciers _______.

form when snow compresses into ice

The water in the Dead Sea has a salinity of 300 ppt. The water _____.

has 300 grams of salt per 1000 grams of sea water

Which of the following materials is most porous? Shale Clay Loosely packed gravel Unsorted sand and rock

loosely packed gravel

Most lakes were formed from _______.

melting glaciers

How freely water moves into and through soil or rock is called ______.

permeability

The water table is ______.

the top layer of the saturated zone

Global warming ______.

threatens polar ecosystems

Which of the following statements is true? Unconfined aquifers are found between two layers of impermeable soil or rock. The Arctic ice cap floats on top of the Arctic Ocean. More of Earth's freshwater is found in rivers than in lakes. Glaciers and ice caps are made of saltwater.

The Arctic ice cap floats on top of the Arctic Ocean.