For those interested in more info on tides, check out the following NOAA website.
http://oceanservice.noaa.gov/education/kits/tides/tides01_intro.html
One of the pages has a fun animation showing the tides changing during a lunar day.
Question for Emily and others: This article refers to tide generating force being inversely proportional to the cube of the distance between the objects. What is this ‘third’ force?
