SOCIAL SCIENCE UNIT 4

Rivers flow downhill into

• Seas and lakes

• Lakes and Rivers

• Seas, lakes, and rivers

• Oceans and seas

Answer explanation

A river is a flowing stream of fresh water. Rivers flow downhill into seas, lakes, and even other rivers!

What do we call large bodies of water that are completely surrounded by land?

• Seas

• Lakes

• Islands

• Glaciers

Answer explanation

Lakes are large bodies of water that are completely surrounded by land. Compared to oceans and rivers, the water in lakes is calm. Lakes contain fresh water or salt water, although most contain fresh water.

Glaciers are usually found on mountains near

• The North Pole

• The South Pole

• Continental-mediterranean climates

• The North and South Pole

Answer explanation

Glaciers are very thick masses of ice that cover large areas of land. They form when snow accumulates and becomes compact. They sometimes look like rivers of ice and are usually found on mountains near the North and South Poles.

About 30% of the freshwater on our planet is found underground. This water is called _______.

A spring is formed when groundwater naturally flows to the _____.

Tell me, in your own words, what evaporation, condensation, and precipitation are.

Aquifers form above layers of _____ rock.

Groundwater collects in layers of rock called ______.

• impermeable

• Aquifers

• Wells

• Springs

The land over which a river flows is called a

• tributary

• riverbed

• river basin

• drainage basin

The point where two rivers meet is called a _____.