Science review

Water on Earth is either fresh water or salt water. Select all the bodies of water that classify as fresh water.

• Sea

• Stream

• Ocean

• River

The Earth has

• more freshwater than saltwater

• more saltwater than freshwater

• the same amounts of saltwater and freshwater

• unknown amounts of saltwater and freshwater

This person is fishing in a small, freshwater body of water. This body of water flows into a larger body of water called a river. What is this small body of freshwater called?

• stream

• glacier

• lake

• pond

Which statement BEST describes an ocean?

• a body of water containing large pieces of ice called glaciers

• a body of fresh water containing Earth's largest organisms

• Earth's largest source of drinking water, located under ground

• a body of salt water that covers about 70% of Earth's surface

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

This is the liquid water component of the Earth. It includes the oceans, seas, lakes, ponds, rivers and streams. It covers about 70% of the surface of the Earth and is the home for many plants and animals.

• atmosphere

• hydrosphere

• geosphere

• lithosphere

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

Which best explains why the "saltwater" distribution category is not subdivided like the "freshwater" distribution category?

• Freshwater sources provide usable water.

• There is only one saltwater source.

• There are too many sources to list.

• Some saltwater sources are unknown.

Tags

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

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

• 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.

Tags

NGSS.MS-ESS2-4

Which of the water features shown on the diagram would MOST LIKELY contain salt water?

• lake

• stream

• sea

• pond

Tags

NGSS.MS-ESS2-4

What is the main difference between a lake and a pond?

• A pond contains salt water. A lake contains fresh water.

• A pond is always formed from a stream. A lake is always formed from a river.

• A lake is larger in size than a pond.

• A pond is higher off the ground than a lake.

Tags

NGSS.MS-ESS2-4

Which is a shared characteristic of all the locations marked by stars on the map?

• volcano hot spots

• saltwater sources

• glacier locations

• Earth's highest points