Gravity Review

Why does the moon revolve around the Earth?

• The moon is very large

• The Earth is very large

• The Moon is held near Earth by gravity

• The Sun's gravitational force holds the moon near Earth

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NGSS.MS-PS2-4

NGSS.MS-ESS1-2

Gravitational force is strongest when two objects are larger and closer together.

• True

• False

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NGSS.MS-PS2-4

Gravity is necessary in the formation of:

• asteroids

• planets

• galaxies

• all of the above

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NGSS.MS-ESS1-2

Mass affects gravitational force because...

• The less mass, the more gravitational force

• The larger something is, the more gravitational force

• The more mass, the more gravitational force

• The smaller something is, the more gravitational force

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NGSS.MS-PS2-4

Distance affects gravitational force because...

• The closer objects are, the greater the gravitational force

• The farther apart objects are, the greater the gravitational force

Tides are caused by:

• Wind

• Earth's orbit around the sun

• Night and Day

• The Moon's gravitational pull

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NGSS.MS-ESS1-2

If a planet moves closer to the Sun, what happens to the gravitational force between them?

• It increases

• It decreases

• It stays the same

• They are still too far apart for gravity

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NGSS.MS-PS2-4

NGSS.MS-ESS1-2

NGSS.MS-ESS1-1

If a planet orbits closer to the sun, what effect will it have on the planet's orbital period (year)?

• The planet's orbital period will be longer

• The planet's orbital period will be shorter

• The planet's orbital period is not affected by distance

• All planets have the same orbital period

Which statement best describes a galaxy?

• a cluster of millions of stars held together by gravity
• a star, with planets, moons and other small space bodies revolving around it
• all known objects
• all of the above

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NGSS.MS-ESS1-2

Which choice best describes the parts of the Milky Way?

• Earth, its moon, the sun, and Jupiter

• Gas, dust, stars, and objects that orbit stars

• Asteroids, comets, objects that orbit stars, and the stars

• The inner planets, the outer planets, gas, and dust