Water Properties, Water Cycle and Distribution

The model below shows the water cycle. What is the purpose of this model?

• to show how severe weather forms in the water

  cycle

• to illustrate how water travels from Earth's

  surface into the atmosphere and back to Earth's

  surface again

• to show how Earth's water formed billions of

  years ago

• to illustrate how some water is lost on Earth as

  some of it never returns to Earth's surface once

  it evaporates

Tags

NGSS.MS-ESS2-4

Most of Earth's surface is covered with water. Only 2.5% of Earth's global water is freshwater. Of all the freshwater on Earth, 78% is frozen. Where is most of Earth's water found?

• glaciers

• lakes

• oceans

• rivers

Tags

NGSS.MS-ESS2-4

Which part of the ocean would have the lowest salinity?

• in areas near melting glaciers

• in areas near the equator

• in areas with the highest temperatures

• in areas where there is little rainfall

Where is most of the Earth's freshwater located?

• in aquifers

• in rivers and streams

• in the ocean

• in icecaps and glaciers

Tags

NGSS.MS-ESS2-4

What is the percentage of saltwater on the Earth?

• 97%

• 71%

• 50%

• 3%

A measure of the amount of dissolved salts in a given amount of liquid

• salinity

• bio-indicators

• wave

• tide

What percentage of the Earth’s surface is covered by water?

• 97%

• 71%

• 50%

• 3%

Tags

NGSS.MS-ESS2-4

Potable water means...

• Water which comes straight from a river or reservoir

• Water containing bacteria

• Water which is safe to drink

• Water which contains a high amount of salt

Aquifers are sources of

• freshwater, which is used for drinking, bathing, and watering crops.

• saltwater, which is pushed through turbines to make energy.

• oil, which is drilled from the aquifer and used to power homes.

• silica, which is used to make glass and paper products.

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS3-1

Why are oceans a major part of the water cycle?

• because they are large bodies of salt water that easily evaporate salt into the air

• because they are large bodies of salt water that fresh water can be evaporated from

• because the salt water condenses easily to become a gas in the air

• because the salt water runs off onto land to fill lakes and streams

Tags

NGSS.MS-ESS2-4