Water Distribution and Conservation

The pie chart below shows the percentage of Earth's freshwater that is from each freshwater source. The part of the pie chart labeled “Other” includes freshwater stored in ground ice, permafrost, air, soil, and living things. Which statement best describes the information in the pie chart?

• Equal amounts of Earth’s freshwater are found underground and in rivers, streams, and lakes. Very little is found in ice caps.

• The smallest amount of Earth’s freshwater is found underground. The rest is stored in the ice caps.

• Most of Earth’s freshwater is found in rivers, lakes, and streams. Very little is found underground or in snow and ice.

• Little of Earth’s freshwater is found on the surface as liquid water. Most is found as ice and snow or underground.

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NGSS.MS-ESS2-4

NGSS.MS-ESS3-1

Which of the following percentages is the best estimate for the amount of water on Earth found in oceans?

• 97%

• 70%

• 54%

• 20%

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NGSS.MS-ESS2-4

A pie chart showing the sources of fresh water on Earth is provided. What sources would accurately label the two largest sources on the diagram?

• rivers/streams and clouds

• oceans and groundwater

• lakes/ponds and atmosphere

• groundwater and ice caps/glaciers

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NGSS.MS-ESS2-4

NGSS.MS-ESS3-1

Approximately 30% of the Earth’s freshwater is stored in

• lakes

• streams

• groundwater

• living things

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NGSS.MS-ESS2-4

Students make a model to represent all the water on the earth. For their model one hundred (100) cans represent all (100%) of the water on our planet. How many cans would represent all the freshwater in all sources on the earth?

• just under ninety-seven (97) cans

• a little more than thirty (30) cans

• about two and a half (2 ½) cans

• less than half (½) can

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NGSS.MS-ESS2-4

Where is most of Earth's freshwater found?

• lakes

• streams

• wetlands

• glaciers

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NGSS.MS-ESS2-4

The letters A-D represent large bodies of water in the United States. All of these are freshwater and are flowing, which means they are moving and do not stay still. They empty into a larger body of water, such as an ocean. What are these bodies of water called?

• glaciers

• lakes

• rivers

• seas

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NGSS.MS-ESS2-4

Less than 3% of the Earth's water supply is fresh water. Only about 0.3% of this supply is surface water, found in rivers, lakes, and swamps. This pie chart shows how this small percentage of surface water is distributed. Based on the data shown, which statement is true?

• The majority of Earth’s rivers and swamps are found in North America and Africa.

• The North American Great Lakes is Earth’s third-largest fresh surface water source.

• The North American Great Lakes and Lake Baikal hold 50% of Earth’s fresh surface water.

• The amount of fresh surface water in swamps and rivers is equal to that of Lake Baikal.

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NGSS.MS-ESS2-4

NGSS.MS-ESS2-1

Water covers over 70% of planet Earth and most of the water is salt water. Which number on the map of the United States represents a body of salt water?

• 1

• 2

• 3

• 4

All of these can be sources of fresh water EXCEPT -

• rivers
• oceans
• lakes
• streams

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NGSS.MS-ESS2-4