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Water Cycle Sum1

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

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

 2. 

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

 3. 

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
 

 4. 

What is the water cycle powered by?
a.
The Sun
c.
the Earth’s rotation
b.
The wind
 

 5. 

 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.
cooled nitrogen in the air around you
c.
water droplets that formed from cooled water vapor in your breath
d.
carbon dioxide that you are breathing out from your lungs
 

 6. 

The atmosphere
a.
is about 20 miles thick
c.
has four layers and weather happens in the top layer
b.
has different layers and weather happens in the bottom layer
d.
is one solid layer of gases around the Earth
 

 7. 

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

 8. 

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 went into the ground.
c.
It no longer exists
b.
It formed clouds.
d.
It went into the air.
 

 9. 

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

 10. 

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

 11. 

when rainwater contibutes or adds to the flow of bodies like rivers and streams, what is it called?
a.
runoff
c.
evapotranspiration
b.
irrigation
 

 12. 

Oceans, the atmosphere, and groundwater are all __________ in the water cycle.
a.
nodes
c.
phases
b.
reservoirs
 

 13. 

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

 14. 

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

 15. 

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

 16. 

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

 17. 

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

 18. 

Which reservoir in the water cycle contains the most water?
a.
the oceans
c.
the ice caps
b.
groundwater
 

 19. 

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

 20. 

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

 21. 

How long can a drop of groundwater stay in the ground?
a.
thousands of years
c.
anywhere from days to thousands of years
b.
days
 

 22. 

The water that we drink is
a.
the same water that the dinosaurs drank
c.
being constantly remade in the aquifers
b.
formed by melting glaciers
d.
new water created in our atmosphere
 

 23. 

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

 24. 

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

 25. 

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



 
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