When the Tide Comes In

A Treasure Hunt about the Ocean Tides



By Vicki Stoodley


Computer Teacher K-8

Saint Mary’s Institute, Amsterdam, NY


Click Here to go to Project Information Page





Have you ever visited the ocean?  Have you ever built a sand castle and then watched the waves get closer and closer until they start washing away the outer wall of your sand castle.  Bit by bit your castle starts to crumble into the sea.  Slowly the waves come higher and higher up the beach until your entire sand castle is washed away.  The tide has come in. 


But why does that happen?  What is the tide?



A treasure hunt is a fun way to find information on the Internet in order to answer some questions. 


This Treasure Hunt is about the Ocean Tides.  It will lead you to some web pages about the tides.  Click on each Internet link and read carefully before answering each question.  You may not always need to read the whole web page to find the answer.  Answer each question in a complete sentence on the answer sheet.                                    


Click here to print the answer sheet



Have fun surfing!


1.     What does the word tide mean?

URL:  http://co-ops.nos.noaa.gov/restles1.html  


2.     What is a high tide?  What is a low tide?

URL:  http://sfgate.com/getoutside/1996/jun/tides.html


3.     What two objects in our sky cause ocean tides? 

Which has the greater effect?

URL:  http://web.mit.edu/corrina/tpool/tides.html


4.     What is a tidal range?

URL:  http://www.onr.navy.mil/focus/ocean/motion/tides1.htm


5.     What is a spring tide?

What causes a spring tide?

URL:  http://www.onr.navy.mil/focus/ocean/motion/tides1.htm


6.     What is a neap tide?

What causes a neap tide?

URL:  http://www.onr.navy.mil/focus/ocean/motion/tides1.htm


7.     How long is a tidal cycle?

URL:  http://www.ndbc.noaa.gov/educate/tides.shtml


8.     How many high tides occur each day?

How many low tides occur each day?

URL:  http://www.the-sea.org/tides.htm


9.     Why do the normal number of high and low tides not happen in some places?

Name one place where this is true, and tell how many high or low tides happen there.

URL:  http://www.the-sea.org/tides.htm


10. What is the most interesting thing you learned today about tides?

URL:  any of the web pages we have already visited.


Bonus:  Click on the arrow at the bottom of this web page.  Answer the quiz.

URL:  http://www.onr.navy.mil/focus/ocean/motion/tides1.htm