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Tides

Tides. Tides are periodic rises and falls of large bodies of water. Tides are caused by the gravitational pull of the moon and inertia. Most coastal areas see two high tides and two low tides every 24 hour period. As the earth rotates, the moon pulls water towards the side it is on.

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Tides

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  1. Tides

  2. Tides are periodic rises and falls of large bodies of water. • Tides are caused by the gravitational pull of the moonand inertia. • Most coastal areas see two high tides and two low tides every 24 hour period.

  3. As the earth rotates, the moon pulls water towards the side it is on. • This creates a bulge of water closest to the moon. • Because objects in motion want to continue to move in that direction, INERTIA cause the water on the opposite side of earth to bulge.

  4. Two Types of Tides • Spring Tide: When the moon is full or new, the gravitational pull of the moon and sun are combined • A Spring tide occurs when the moon’s gravity and the sun’s gravity pulls on the water. • At these times high tides are VERY HIGH and low tides are VERY LOW.

  5. Neap Tide: During the moon's quarter phases the sun and moon work at right angles, causing the bulges to cancel each other. • These tides usually produce a much smaller difference between high and low tide.

  6. What is the main cause of tides? • The gravitational pull of the moon and inertia • The gravitational pull of the sun • The gravitational pull of the Earth • I need help!

  7. If the sun, Earth and moon are perfectly aligned (as pictured), what event will occur on Earth • Neap Tide • Solar Eclipse • Lunar Eclipse • Seasonal Change

  8. Tides are caused mainly by: • Earth’s rotation on its axis • Differences in how much the sun pulls on different parts of the Earth • Strong winds blowing water onto the coast • Differences in how much the moon pulls on different parts of the Earth

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