How Do Tides Work?
ES2406  Observing Tides at Cape Porpoise Harbor, October 24, 2001

The animation below displays a sequence of photographs showing tidal changes at Cape Porpoise Harbor, Maine on October 24, 2001.

  !   Click the image to see the animation. What type of weather did the area experience in the mid-morning? The tide chart on the right tracks time and tide levels through the day.

Tide chart: Tom Grace, TERC, Adapted from: © 1996 N. Dean Pentcheff
for the WWW presentation at and
© 1998 David Flater for the XTide program

6. Describe the changes in tidal levels that occurred on October 24. At what times did the highest and lowest tides occur?

7. Predict when the next low tide occurred.

 Step:   1   2   3   4   5