Review Unit 4: Hydrosphere

Why is Earth called the blue planet?

• Because it has almost all land.

• Because it has a lot of water.

• Because it has a lot of air.

• Because it does not have gases.

How much of the Earth is covered in water?

• 97%

• 3%

• 75%

• 50%

97% of the water on Earth is

• salt water

• freshwater

• potable

Where is MOST of the freshwater on the Earth TRAPPED?

• in the ocean

• in the seas

• in the groundwater

• in the glaciers and ice caps

Which graph correctly represents the water distribution on Earth?

• A

• B

• C

• none of them

Water is important because

• it supports all life

• it is used to cook and clean

• it is used as a source of transportation

• all of these are reasons water is important

Where can you find salt water?

• oceans

• rivers

• lakes

• clouds

Check all that are part of the hydrosphere

• fish

• glaciers

• water vapor

• rivers

Tags

NGSS.MS-ESS2-4

What is sewage?

• waste water (from your bathroom)

• clean water

• chlorine in the water

• drinkable water

The process of cleaning water is called

• water pollution

• water purification

• water shortage

• water waste