If you missed the notes, the Wikipedia acticle on tides is quite good. For our class, we care about what causes the basic tides, spring tides, and neap tides. You will not be held responsible for all the details in the Wikipeida article...although the whole subject is quite fascinating.
Homework: In your own words, explain the origin of the ocean tides. Be specific and thorough!
Extra credit: There are 2 tide cycles per day and 24 hours in a day. Then why is the average period of one tide cycle 12.5 hours instead of 12 hours?
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