When do they occur?
TIDES
How often do they occur?
What causes them?
CAUSE:
GRAVITY!
Mostly
from the
Moon.
Remember that the
Earth is spinning on
its axis once every
twenty-four hours.
So what does this do
to the timing of the
tides throughout the
day?
How much time is
there between a high
tide and a low tide?
Or high tide and the
next high tide?
What about the SUN?
Doesn't it have even
MORE gravity than
the moon?
Doesn't it pull at the oceans too????
ANSWER:
YES!
SPRING
TIDES
VS.
NEAP
TIDES
(Notice the
phases of the moon!)
E
S
Move the moon into position for:
Spring Tides
E
S
Move the moon into position for:
Neap Tides
The Bay of Fundy
The biggest tides in the world!
Up to 50 feet!
Click on image for time-lapse video.
Click on image for a short video on the Bay of Fundy.
Where rivers flow into the Bay of Fundy, the strong tide can actually
"collide" with the river's flow and create what is called a TIDAL BORE.
Click on the image for a short video of rafting the tidal bore.
Where rivers flow into the Bay of Fundy, the strong tide can actually
"collide" with the river's flow and create what is called a TIDAL BORE.
Click on the image for a short video of rafting the tidal bore.