How Gravity Effects Tides & Planets Standard 8-4.7 Explain the effects of gravity on tides and planetary orbits.

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Presentation transcript:

How Gravity Effects Tides & Planets Standard Explain the effects of gravity on tides and planetary orbits.

Gravity’s Effect on Tides EQ: ***SEE 8-4.4*** How does gravity effect tides?

Gravity’s Effect on Planetary Orbits EQ: How does gravity affect planetary orbits?

Planetary Orbits What are planetary orbits caused by? What keeps the planets, including Earth, moving in elliptical (slightly oval) orbits & determines how fast they orbit? the pull of gravity 1. the Sun’s gravitational attraction 2. along with the planet’s inertia

Speed of Orbits Why do planets near the Sun move/orbit faster than planets farther away from the Sun? What happens when a planet is farther from the Sun? the gravitational attraction is greater the gravitational attraction between them decreases, and the planet moves/orbits slower