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S6E3abtest

Multiple Choice
 

 1. 

What is the sum total of all water on Earth and in its atmosphere?
a.
hydrosphere
c.
biosphere
b.
oceanography
 

 2. 

An underground layer of permeable rock that contains water is
a.
an aquifer
c.
a glacier
b.
a reservoir
d.
impermeable
 

 3. 

mc003-1.jpg
Which letter shows water falling back to Earth?
a.
A
c.
C
b.
B
d.
D
 

 4. 

When precipitation infiltrates into the ground, it becomes what?
a.
a spring
c.
groundwater
b.
runoff
 

 5. 

What is evaporation?
a.
the process of precipitation becoming groundwater
c.
The process of liquid water becoming water vapor
b.
the process that condenses water vapor into clouds
 

 6. 

Only 3% of the water on Earth is freshwater. About 60% of that water is not available for man's use. Why is this?
a.
it is frozen
c.
it is in aquifers
b.
it is too salty
d.
it is polluted
 

 7. 

The clouds in the sky are
a.
evaporated water
c.
water droplets
b.
up in the stratosphere
d.
water vapor
 

 8. 

mc008-1.jpg
Which letter shows water changing into water vapor?
a.
A
c.
D
b.
C
d.
E
 

 9. 

 If you breathe on a mirror, part of the mirror clouds up. What are you actually seeing when you see the mirror cloud up? 
a.
oxygen that you are breathing out from your lungs
b.
water droplets that formed from cooled water vapor in your breath
c.
carbon dioxide that you are breathing out from your lungs
d.
cooled nitrogen in the air around you
 

 10. 

What causes the outside of the windshield of a car to get icy on a cold autumn night when there is no rain?  
a.
Hydrogen and oxygen in the air combine and form water, and it freezes
b.
Moisture comes from inside the car and freezes.  
c.
Water that is already on the glass freezes.  
d.
Water vapor from the air condenses and freezes on the glass.  
 

 11. 

The total salinity of the world’s oceans is
a.
50 %
c.
15%
b.
25%
d.
3.5%
 

 12. 

mc012-1.jpg
Which letter shows where water vapor is changing into water droplets?
a.
A
c.
C
b.
B
d.
D
 

 13. 

The Earth’s surface
a.
has the same amount of land and water
b.
is covered by more water than land
c.
has about three times more water than land
d.
is covered mostly by land
 

 14. 

A large lake that is used to provide water to a city is
a.
a reservoir
c.
usually underground
b.
created by desalination
d.
an aquifer
 

 15. 

mc015-1.jpg  Which letter shows where water is returning to the reservoir?
a.
A
c.
D
b.
C
d.
E
 

 16. 

In the morning, Mary noticed there was dew on the grass. In the afternoon, the grass was dry. What most likely happened to the water?
a.
It formed clouds.
c.
It no longer exists
b.
It went into the ground.
d.
It went into the air.
 

 17. 

mc017-1.jpg  Which letter shows where transpiration is happening?
a.
A
c.
C
b.
B
d.
D
 

 18. 

Which contains the greatest amount of Earth's freshwater?
a.
oceans and seas
c.
groundwater
b.
lakes and rivers
d.
glaciers and polar ice cap
 

 19. 

When rainwater flows into bodies of water like rivers and streams, what is it called?
a.
irrigation
c.
runoff
b.
evapotranspiration
 

 20. 

During the water cycle, when water vapor changes to liquid water, it is called
a.
evaporation.
c.
freezing.
b.
boiling.
d.
condensation.
 

 21. 

The amount of water on the earth
a.
is always increasing because of rain
b.
is never the same because we keep using it
c.
changes from year to year because of the weather
d.
stays the same
 

 22. 

Only fresh water moves through the water cycle because
a.
salt water has a separate cycle
c.
salt water only rains back into the ocean
b.
salt water is too heavy to evaporate
d.
the salt is left behind when water evaporates
 

 23. 

The salts in the sea come from
a.
acid rain.
c.
particles falling from space.
b.
weathering and erosion of rocks.
d.
organisms that live in the sea.
 

 24. 

Dew is formed by
a.
the condensation of water vapor.
b.
groundwater being pulled to Earth's surface.
c.
frost melting just before sunrise.
d.
transpiration performed by plants.
 

 25. 

What are rain, snow, sleet, and hail called in the water cycle?
a.
evapotranspiration
c.
precipitation
b.
hydration
 

 26. 

Which factor is MOST important in determining how much groundwater can be stored in underground rock?
a.
the rock's porosity
c.
the rock's location
b.
the rock's hardness
d.
the rock's geologic age
 

 27. 

When was there more water on Earth?
a.
it has always had the same amount
c.
today, because we conserve it
b.
one billion years ago
 

 28. 

For frost to be on the grass in the morning, the water vapor in the air must
a.
boil and evaporate.
c.
evaporate and freeze.
b.
condense and freeze.
d.
boil and condense.
 

 29. 

Most of the water on the Earth is found
a.
in river and a lakes
c.
in the oceans
b.
underground
d.
in the polar icecaps
 

 30. 

If we add together the amount of water found in rivers, lakes, ice caps and underground, we
a.
find out how much water is on the Earth.
b.
find out how much fresh water is on the Earth
c.
find where the best place to get water is
d.
find out how much water we can use
 

 31. 

What powers the water cycle?
a.
the Moon’s gravity
c.
the Earth’s rotation
b.
the wind
d.
the Sun
 

 32. 

Which two physical changes are essential processes in the water cycle?  
a.
ebbing and flowing
c.
oxidation and reduction  
b.
evaporation and condensation  
d.
mixing and separating  
 

 33. 

Which process is most important to the water cycle?  
a.
erosion  
c.
flooding  
b.
evaporation  
d.
farm irrigation
 

 34. 

Precipitation type is caused by
a.
the temperature of the atmosphere
c.
the height up in the atmosphere
b.
the size of the clouds
d.
the latitude of the land
 

 35. 

Why is it important not to have a well for drinking water near a landfill?
a.
pollution from the dump might leach down into the aquifer
b.
it is alright to dig a well near a landfill
c.
it might get hit by a garbage truck
d.
the well might flood the garbage dump
 



 
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