Water locations and distributions

Which of the following percentages is the best estimate for the amount of the water on Earth which is stored in the ocean?

• 97%

• 70%

• 54%

• 20%

Of all of the freshwater on Earth, most of it is found in –

• lakes

• streams

• wetlands

• glaciers

The Earth has

• more freshwater than saltwater

• more saltwater than freshwater

• unknown amounts of saltwater and freshwater

• the same amounts of saltwater and freshwater

Of all of the freshwater on Earth, most of it is found in –

• lakes

• streams

• wetlands

• glaciers

This pie chart displays the makeup of Earth's water. Which sentence is true about Earth's water, based on the data in the pie chart?

• Over 30% of fresh water humans use comes from lakes and rivers

• Humans use a much greater percentage of salt water than fresh water

• Fresh water makes up 2.5% of the water on Earth so it should be conserved

• Most of Earth's total water is frozen in ice glaciers, which are made of salt water

The chart shows the distribution of fresh water on Earth. Most of the fresh water on Earth is

• highly polluted

• in the frozen state

• used for agriculture

• purified for drinking

Approximately _____ percent of Earth's water is freshwater.

• 97

• 1

• 3

• 10

What percent of Earth's freshwater is available for humans to use?

• 3

• less than 1

• 97

• 10

Why do we need to conserve water?

• It is an unlimited resource. 
• It is a limited resource. 
• There is a lot of water. 
• There is no need to conserve water.

Earth's water is mostly

• saline (saltwater)

• freshwater.

• fresh groundwater.

• fresh surface water.