Hydrosphere Mid Unit Test Review

Study the graph below.  Where is most of the Earth's water located?

• Rivers and Lakes
• Glaciers and Icecaps
• oceans
• groundwater

Tags

NGSS.MS-ESS2-4

How much of Earth's water is unavailable for humans to consume due to its high salinity? 

• 3%
• 23%
• 77%
• 97%

Why is MOST of the freshwater on Earth not available for our use?

• All freshwater on Earth is easily accessible for use.
• It is frozen in the icecaps and glaciers.
• It is surface water.
• It is underground.

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS3-1

Which BEST describes how the total amount of water present in the hydrosphere varies over time?

• The total amount of water in the hydrosphere decreases over time due to the process of evaporation.
• The total amount of water in the hydrosphere remains the same over time, but changes form due to the water cycle.
• The total amount of water in the hydrosphere increases over time due to the process of precipitation.
• The total amount of water in the hydrosphere both decreases and increases over time due to competing processes such as evaporation and precipitation.

Tags

NGSS.MS-ESS2-4

Why is freshwater important?

• So we can have lakes and Rivers
• There is no such thing as freshwater.
• We need it to survive.

Tags

NGSS.MS-ESS2-4

NGSS.MS-LS2-1

Which part of a water molecule has a Positive Charge?

• The Hydrogen

• The Oxygen

• The Top

• The Bottom

Tags

NGSS.MS-PS1-1

Which part of a water molecule has a Negative Charge?

• The Hydrogen

• The Oxygen

• The Left

• The Right

Tags

NGSS.MS-PS1-1

Water striders can walk across the surface of calm water. Their feet push the surface of the water down slightly, but they do not break the surface. Why?

• The insects are light enough so they do not break the surface tension

• The insects actually use their wings to hover slightly above the water’s surface and they only skim it with their feet.

• The insect’s feet are hydrophobic, so they are repelled by the water molecules and are pushed away from the water’s surface.

• The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next

Because water has a positive and a negative end, and is attracted to other molecules it is called a ______ molecule.

• mickey mouse
• polar (tiny magnet)
• special
• miracle

Tags

NGSS.5-PS1-1

An underground water supply is...

• erosion

• river

• water shed

• aquifer

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS3-1