Gravity in the solar system 1

Gravity is

• The force of attraction that pulls objects towards each other.

• The force of attraction that only pulls things towards the Earth.

• The force of attraction that only pulls things towards the Sun.

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What is an orbit?

• The quickest way to get from one place to another.

• How fast an object orbits around the sun.

• The path an object takes as it moves around another object, such as the Earth around the Sun.

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What is mass?

• How much something weights.

• The amount of stuff (matter) an object has.

• How big something is.

Gravity depends on which two factors?

• weight and mass

• mass and distance

• weight and distance

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What is inertia?

• An objects resistance to a change in its motion.

• How fast an object is moving.

• How far an object is moving.

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What is velocity?

• The exact same thing as speed.

• How fast something is moving in circles.

• How fast an object is moving in a certain direction.

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What two things keep the planets in orbit around the sun?

• Gravity and inertia

• Weight and mass

• Distance and velocity

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An object that has a lot of mass will have

• A little bit of gravity

• A lot of gravity

• No gravity whatsoever

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The farther apart two objects are

• the less gravity they will have

• the more gravity they will have

• the amount of gravity will not change if they are closer or farther apart.

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If the Earth didn't have any inertia (or wasn't moving) it would

• Stay in orbit anyway.

• Crash into the sun,

• Fly off into space.

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