Gravity

The force that causes objects with mass to attract to one another:

• Weight

• Mass

• Gravity

• Magnetism

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Why do planets orbit the Sun?

• The Sun is the only celestial object that has a gravitational pull.

• The Sun’s chemical composition makes it attract planets.

• Only celestial bodies that emit light, like the Sun, can be at the center of an orbit.

• The Sun is the most massive object in our solar system, so it exerts the greatest gravitational pull.

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Gravity can be defined as the –

• force of attraction between two or more masses.

• friction created when two objects are in contact.

• energy given off by stars due to nuclear reactions.

• path an object follows as it moves through space.

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As distance between two objects increases, the pull of gravity 

• Increase

• decrease

• stays the same

• has not effect

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Why are we pulled to Earth's center and NOT the sun's?

• The sun is very LARGE

• The sun is very FAR AWAY

• Earth has a STRONGER GRAVITY than the sun

• Earth ORBITS around the sun

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What would happen to Earth without the sun's gravity?

• Earth would DRIFT INTO SPACE

• Earth would ORBIT the sun

• Earth would be SMALLER

• Earth would get CLOSER TO OTHER PLANETS

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Two factors effecting the magnitude of the force of gravity between 2 objects are...

• weight and mass.

• distance and weight.

• mass and matter.

• mass and distance.

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What is gravity?

• A non-contact force

• A push

• Energy

• All of them

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Without gravity we would________.

• Stay in the ground

• Nothing would happen.

• Float away

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Which has more mass, Earth or the Moon?

• The same

• The Earth

• The Moon

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