AnswersPBCSD_Grade_Forgiveness_2001310_Earth Space Science_S2_2019Fundamental Forces

Fundamental Forces Answers

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1
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Yanni made a chart to compare the strong and weak forces. Which best describes Yanni’s error?

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A
Only the weak force is active in the nuclei of atoms.
B
The weak force keeps particles that make up neutrons together.
C
The strong force overcomes repulsion and keeps protons together.
D
The strong force is responsible for radioactive decay.
2
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Which is an example of the gravitational force?

A
A basketball that was thrown in the air falls to the ground.
B
The particles that make up the neutrons in an oxygen atom are held together.
C
A radioactive element, uranium, decays and becomes stable.
D
The molecules that make up olive oil stick together.
3

How are the weak and the strong forces alike?

A
They have infinite ranges.
B
They are attractive only.
C
They are attractive and repulsive.
D
They have very small ranges.
4

Which is a force that attracts any two pieces of matter in the universe?

A
weak
B
static
C
electromagnetic
D
gravitational
5

The diagram shows the protons and neutrons in an atom.

Question illustration
A
static
B
electromagnetic
C
strong
D
light
6

Sayyid drew a diagram to compare the gravitational and electromagnetic forces.

Question illustration
A
is attractive only
B
acts within nucleus
C
attracts and repels
D
has an infinite range
7

Which best completes the statement?The electromagnetic force ________ than the gravitational force.

A
is stronger
B
is weaker
C
has greater range
D
has shorter range
8

Which best contrasts the weak force and the electromagnetic force?

A
The weak force acts within protons and neutrons, and the electromagnetic force has an infinite range.
B
The weak force is attractive and repulsive, and the electromagnetic force is attractive only.
C
The weak force is attractive only, and the electromagnetic force is attractive and repulsive.
D
The weak force has an infinite range, and the electromagnetic force acts within protons and neutrons.
9

Which shows the correct order of forces, from weakest to strongest?

A
weak, strong, gravitational, electromagnetic
B
electromagnetic, weak, strong, gravitational
C
gravitational, weak, electromagnetic, strong
D
weak, electromagnetic, gravitational, strong
10

Ellen does an experiment by releasing a ball from a height of 1 m above each floor in a tall building. She records the time it takes the ball to reach the floor.

A
How does distance affect the gravitational force on objects?
B
How does distance affect the electromagnetic force on objects?
C
Does height affect the strong force acting on a moving ball?
D
Does height affect the weak force acting on a moving ball?

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