2024 Science Review #3

Why is your weight different on Earth than it is on the moon?

• Your mass decreases on the moon.

• The moon has less gravitational pull than Earth.

• Earth has less gravitational pull than the moon.

• Your weight never changes.

What is a non-contact force?

• Forces between touching objects.

• Forces between objects that do not touch.

• Forces between objects with no mass.

• A car collision.

Which of these words describes the force between the north pole of a magnet and the south pole of another magnet?

• Attraction.

• Contraction.

• Reaction.

• Distraction.

Which of these words describes the force between two negatively charged particles?

• attract

• repel

• contract

• distract

According to the picture, what is the net force?

• 80 Newtons to the left

• 80 Newtons to the right

• 20 Newtons pushing upward

• 20 Newtons to the left

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How does the gravitational force change as two objects move farther apart?

• It increases

• It decreases

• It remains constant

• It is zero

Which diagram has the weakest gravitational pull?

• A

• B

• C

• D

Two factors affecting the magnitude of the force of gravity between two objects are:

• Mass and distance

• Mass and matter

• Distance and weight

• Weight and mass

Calculate the net force.

• 38 N to the left

• 38 N to the right

• 20 N to the left

• 2 N to the left

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On Earth, a brick has a mass of 8 kg and a weight of 4 lbs. What predictions could we make about the mass and weight of the brick on the Moon, where there is less gravity?

• mass will stay the same but weight will decrease

• mass will stay the same but weight will increase

• mass will decrease and weight will decrease

• mass and weight stay the same