Name ___________________________                ______________

Analyze Information

1.   What is the difference between salt water and fresh water?

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For questions 2—4, circle the letter of the correct answer.

2.   What does the shaded part of the graph represent?

 

a.   how much water makes up Earth’s surface

b.  how much [and makes up Earth’s surface

c.  how much salt water makes up Earth’s surface

d.  how much fresh water makes up Earth’s surface

 

3.   Where does most of our supply of fresh water come from?

 

a.   the atmosphere

b.  surface water and ground water

c.  the oceans

d.   ice

 

4.   What happens to ocean water during the water cycle?

 

a.   It condenses and becomes water vapor.

b.  It evaporates and becomes water vapor.

C.     It makes rain salty.

d.  It isn’t part of the water cycle.

 

Problem Solving

5.   Suppose you are shipwrecked on an island that has no source of fresh water. You know you cannot drink the salty ocean water. You also know that you must have fresh water to survive. What can you do to try to get some fresh water to drink? Write your answer on page 88.

                                                                              Unit D • Earth’s Water                             

 

 

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WATER CYCLE

                                                                        

Write the following words on the correct lines in the picture.

                                                                  

                                                                   Evaporation            Condensation

                                                                                       Precipitation

                 

 

 

Fill in each blank with a term from the box.

                        

condense         evaporate     natural resource        surface water

 

7.  A useful material from Earth is a(n)________________________.

 

8.   When water vapor changes to a liquid, it is said to ___________________.

 

9.     When liquid water changes to water vapor, that water is said to _____________________.

 

10. A lake is an example of ________________________  because it is a source of water that already exists on land.