Role of Gravity in Celestial Motions

What is the role of gravity in the motions of celestial objects?

• It causes celestial objects to move in straight lines.

• It has no significant role in the motions of celestial objects.

• It causes celestial objects to orbit around each other.

• It causes celestial objects to repel each other.

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What is gravity?

• A) A type of energy

• B) An attraction force between all masses in the universe

• C) A magnetic field around the Earth

• D) The force that pushes objects upwards

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Which objects do not have the property of gravity?

• A) Only planets

• B) Only stars

• C) All matter

• D) No objects; all matter has gravity

When do we typically feel the force of gravity?

• A) When the object is small like an apple

• B) When the object is moving fast

• C) When the object has a huge mass like a planet

• D) When the object is very light

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According to Newton's Law of Universal Gravitation, which two factors affect the gravitational force between two objects?

• Mass and temperature

• Distance and temperature

• Mass and distance

• Speed and mass

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Why does the Earth's gravity have a much larger effect on us than the Sun's gravity?

• Because the Sun's gravity is not as strong as the Earth's

• Because the Earth is much closer to the Sun than to the Moon

• Because gravity weakens with distance and the Sun is much farther away from us

• Because the Earth's gravity is not affected by distance

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How does the Moon's gravity compare to that of Earth's?

• The Moon has the same gravity as Earth.

• The Moon has 1/6th the gravity of Earth.

• The Moon has twice the gravity of Earth.

• The Moon has no gravity.

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What does orbiting mean?

• The path a larger mass takes around a smaller mass in space.

• The path a smaller mass takes around a larger mass in space.

• The path two masses of equal size take around each other in space.

• The path a mass takes when it travels in a straight line through space.

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What is orbiting?

• The path a planet takes around the sun

• When a moving object in space is pulled into a circular path around a massive object like a planet or a star due to gravity

• The spinning of a planet on its axis

• The movement of a comet through space

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What is orbiting?

• The path that a satellite takes around the Sun

• The process by which satellites remain in space due to the balance between their forward velocity and downward attraction to Earth

• The movement of a satellite away from Earth

• The spinning of Earth on its axis

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