Gravity and Motion

The first scientist to realize that there was a force acting between the Earth and the moon that kept them in orbit

• Albert Einstein

• Bill Nye

• Charles Darwin

• Isaac Newton

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The strength of the force of gravity depends on

• The weight of the objects and their speeds

• The distance of the objects and their speeds

• The masses of the objects and the distance between them

• Mass of the objects and their speeds

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NGSS.MS-PS2-4

The moon's gravity is only a fraction of the Earth's gravity. Which fraction represents the moon's gravity compared to Earth?

• 1/3

• 1/6

• 1/4

• 1/2

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The force of gravity gets weaker as the distance between objects increases.

• True

• False

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How long is a rotation of Earth?

• 365 days (1 year)

• 48 hours

• 1 minute

• 24 hours (1 day)

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The force that attracts all objects toward each other is called

• motion

• inertia

• gravity

• magnetism

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The scientific law that states that every object in the universe attracts every other object.

• Law of Universal Gravitation

• Newton's First Law of Motion

• Force

• The Law of the Universe

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NGSS.MS-PS2-4

A measure of the force of gravity acting on an object.

• mass

• weight

• inertia

• force

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The tendency of an object to resist a change in motion.

• inertia

• mass

• motion

• weight

What forces combine to keep Earth in its orbit around the sun and the moon in orbit around Earth.

• Mass and Gravity

• mass and weight

• Mass and Inertia

• Gravity and Inertia

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NGSS.MS-ESS1-1

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