TIDES

Name ____________________________________

Directions:  Using the following Web site, answer the questions below in complete sentences.

http://www.umassd.edu/Public/People/Kamaral/thesis/Tides.html

1.  What are tides caused by?  __________________________________
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2. Which exerts stronger gravitational pull on earth, the sun or the moon?
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3.  What happens when the moon faces one side of the earth?
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4.  What is a spring tide? ______________________________________

5.  What position do the sun and moon have to be in to create a spring tide?
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6.  Explain a neap tide.  ________________________________________
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7.  In most places on earth, how often do high and low tides occur?
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8.  How long does it take the moon to completely rotate around the earth?
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Go To:  http://www.sfgate.com/getoutside/1996/jun/tides.html

Draw the phases of the moon around the earth below.  Label neap tides with an N and spring tides with an S.