tides

TidesBy, Jase FrankePeriod 4

What Are Tides?Tides are shifting patterns of water level.Tides are formed by the varying gravitational pull between the spinning Earth and the Moon and the Sun.

Centrifugal Force • The tendency of an

object following a curved path to fly away from the center of curvature. Centrifugal force is not a true force; it is a form of inertia.

• Centrifugal force pushes masses of ocean water to move in the opposite direction.

Tides and the moon• The water on the side of

the earth facing the moon is acted on by the gravitational force.

• Because water is a fluid, it moves directly to a point directly

• Under the moon and produces a bulge.

• This causes areas to have high tides and low tides.

Tidal Cycle• One rotation of the earth takes 24 hours, the moon

moves slightly in orbit each day so that a location on the earth’s surface needs an extra 50 minutes to come in line with the moon again.

• A full Tidal Cycle takes 24 hours.

Tidal Range• Tides shape the geographic features all over the earth.

Such as, depth and the formation of the beach.• Diurnal Tide is condition were some coastal areas have

only one high tide and one low tide each day.• Mixed Semidiurnal tide is when the high and low tides

are at different levels.

Tidal Range• Flood tide is rising tide of the

coast.• Ebb tide is falling tide.• Tidal currents are associated

with the rising and falling of tides.

• Slack water are when tidal currents slow down and reverse.

• Slack Water

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