Unit 3 Test Study Guide

Vectors are:

• Quantities with only magnitude

• Quantities with both magnitude and direction

• Quantities with only direction

• Quantities with neither magnitude nor direction

What happens to objects falling on the moon because it has less mass than Earth?

• They fall slower due to lower gravity.

• They fall faster due to lower gravity.

• They do not fall at all.

• They fall at the same rate as on Earth.

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What determines gravitational pull?

• Mass and distance between objects

• Temperature and pressure

• Speed and velocity

• Color and texture

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The effect of gravity that keeps objects moving in a circular path is known as:

• Centripetal force

• Centrifugal force

• Gravitational pull

• Inertia

What happens to an object's gravitational pull if its mass increases?

• It decreases

• It remains the same

• It increases

• It disappears

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Earth’s gravity pulls on the moon and keeps it in orbit. What does the moon’s gravity do?

• It has no effect on Earth.

• It pulls on Earth, affecting tides.

• It pushes Earth away.

• It keeps Earth stationary.

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Which force keeps the planets in orbit?

• Electromagnetic force

• Nuclear force

• Gravitational force

• Frictional force

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A 500 g ball and a 200 g ball are dropped from a tower. Both balls are the same size and there is no air resistance. Which ball will hit the ground first?

• The 500 g ball

• The 200 g ball

• Both will hit the ground at the same time

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If an arrow on a diagram shows both speed and direction, it is considered…

• a vector

• a scalar

• a force

• a trajectory

What can slow something down if it is dragged across the ground?

• Friction

• Gravity

• Momentum

• Inertia

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