Tidal variation
Tides related to the moon & sun, but do not occur equally at all locations on earth
- Different locations on earth have different tidal ranges
- Frequency of tides at a particular location may vary with a daily or yearly cycle
- Tide ranges vary with an astronomical cycle that is 18.6 years long
Examine & classify tides by determining the tidal curve at a location
Tidal curve = plot still water height vs. time