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The Effects of Gravity & Tides

The Effects of Gravity & Tides. 8-4.4 Explain the motions of Earth and the Moon and the effects of these motions as they orbit the Sun (including day, year, phases of the Moon, eclipses, and tides). 8-4.7 Explain the effects of gravity on tides and planetary orbits.

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The Effects of Gravity & Tides

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  1. The Effects of Gravity & Tides • 8-4.4 Explain the motions of Earth and the Moon and the effects of these motions as they orbit the Sun (including day, year, phases of the Moon, eclipses, and tides). • 8-4.7 Explain the effects of gravity on tides and planetary orbits.

  2. The Effects of Gravity & Tides • What are tides? • Where are the effects of tides noticed most? • changes in the surface levels of Earth’s ocean water caused by the effects of the Moon’s & Sun’s gravity on Earth • along ocean shorelines

  3. High & Low Tides • How does a high tide occur? • Another high tide also occurs where? • Where do low tides occur? • As the Moon orbits Earth, the waters of Earth closest to the Moon bulge outward toward the Moon; this bulge is the high tide. • on the opposite side of Earth • in the areas between the two high tides

  4. Spring & Neap Tides • How do spring tides occur? • How do neap tides occur? • When the Sun & the Moon are aligned, the high tides are higher & the low tides are lower. • When the Sun & the Moon are at right angles (90)to each other, there is the least difference in tidal range at the shore.

  5. CFU 1. Earth’s rotation period= 2. Earth’s revolution period = 3. Moon’s rotation period = 4. Moon’s revolution period= 5. Why do you only see one side of the moon?

  6. What moon phases are a spring tide? • What moon phases are a neap tide? • How many high tides do we have in one day? • High tides are highest during a ___. • Why?

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