Visit the Tides Evergreen Project to complete the following worksheet.

What effect does the sun and the moon have on tides?
The oceans, which are liquid, are greatly affected by the two forces of nature:
1. The __________________________ pull of the sun and moon.
2. The centrifugal _______________________ the earth applies as it spins.

  Which has the most influence on the tides, the sun or the
        moon?

        Circle one:        Sun                 Moon

Why?_______________________________________________________
 

What does the pull of the sun and moon do to the oceans?

It creates two types of tides, _______________ and _______________.

Spring Tides
When the moon is full or new the gravitational pull of the moon and sun are combined. At these times the high tides are very high and low tides are very low.

Draw the sun, moon, earth and the effect of the tides below.
 

Spring Tide

Neap Tides
During the moon's quarter phases the sun and moon work at right angles, causing the bulges to cancel each other. The result is a smaller difference between the high and low tides.
Draw the sun, moon, earth and the effect of the tides below.
 

Neap Tide

Where is the highest tide in the world?

The highest tides are  in the ________________  _____ ___________________  in Nova Scotia. They can rise and fall up to _________  metres a day.