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TIDES

TIDES. What are tides? Tides are the periodic rise and falling of large bodies of water. The gravitational attraction of the moon causes the oceans to bulge out in the direction of the moon. Review. Phases of the moon Eclipses Isaac Newton’s law of gravitational forces in the universe.

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TIDES

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  1. TIDES What are tides? • Tides are the periodic rise and falling of large bodies of water. • The gravitational attraction of the moon causes the oceans to bulge out in the direction of the moon.

  2. Review • Phases of the moon • Eclipses • Isaac Newton’s law of gravitational forces in the universe

  3. What causes tides? • The high and low tides are caused by the gravitational forces between the Earth and the moon. • The moon tries to pull at anything on the Earth; but, the Earth is able to hold on to everything except water. • Because the water is always moving the moon is able to pull at it.

  4. TYPES of TIDES SPRING TIDES NEAP TIDES Occur when the sun, the Earth and the moon are at right angles. When there is a quarter moon. There is a small difference between high and low tides. • Occurs when the Earth, the sun and the moon are in a straight line. • When there is a full moon or a new moon the gravitational pull of the moon and the sun are combined. • The high tides are very high and the low tides are very low.

  5. Tides and Lunar Phase Graph • EarthComm. Page E16 • Questions 1, 2, 3 and 4

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