AnswersNC-Physical ScienceUnit Test

Introduction to Waves Answers

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Augie created this chart about the two kinds of waves.Which best labels the chart?

Question illustration
A
Title 1 is “Longitudinal Waves,” and Title 2 is “Transverse Waves.”
B
Title 1 is “Transverse Waves,” and Title 2 is “Longitudinal Waves.”
C
Title 1 is “Electromagnetic Waves,” and Title 2 is “Mechanical Waves.”
D
Title 1 is “Mechanical Waves,” and Title 2 is “Electromagnetic Waves.”
2
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Natalia is studying a wave produced in her magnetics lab. This wave can move through the empty space in a vacuum and carries a lot of energy.What wave is Natalia most likely studying?

A
a sound wave
B
an ocean wave
C
a gamma ray
D
an earthquake shock wave
3

Which is the best analogy of a wave?

A
A wave is like building a ramp.
B
A wave is like shaking a hand.
C
A wave is like water rippling in a pond.
D
A wave is like knocking down a building.
4

Brody and Ethel are arguing about waves. Brody says that waving his hand back and forth is a scientific wave. Ethel says that it is not. Which statement best describes who is correct?

A
Brody is correct because the wave involves an input of energy.
B
Ethel is correct because energy is not carried from one place to another.
C
Brody is correct because the pattern repeats.
D
Ethel is correct because the motion has no pattern.
5

Jenny is trying to describe a wave. Which example would be the best description?

A
a toy car hitting a wall and bouncing back
B
a toy car rear-ending a toy car that then rear-ends another toy car
C
two toy cars driving parallel to each other at the same speed
D
two toy cars driving away from each other at the same speed
6

Which refers to any disturbance that carries energy from one place to another?

A
wave
B
trough
C
motion
D
crest
7

What is the motion of the particles in this kind of wave?

Question illustration
A
The particles will move up and down over large areas.
B
The particles will move up and down over small areas.
C
The particles will move side to side over small areas.
D
The particles will move side to side over large areas.
8

2 circles with an overlap. The left circled is labeled Longitudinal Wave with further labels parallel motion, like moving a spring up and down. The right circle is labeled Transverse Wave with further labels perpendicular motion, like moving a spring back and forth. In the overlap are labels particles only move a small amount, particles do not move with the wave.

Question illustration
A
“Parallel” and “Perpendicular” are switched.
B
The spring descriptions of motion are switched.
C
Particles travel along the wave in longitudinal waves.
D
Particles move long distances in transverse waves.
9

Which statement applies to transverse waves?

A
The waves have a trough.
B
Particles move great distances.
C
The waves have alternating compressions and expansions.
D
The energy is transferred parallel to the direction of the wave motion.
10

Venn diagrams are used for comparing and contrasting topics. The overlapping sections show characteristics that the topics have in common, and the sections that are unique to each topic show the characteristics that apply to only that topic. This Venn diagram is comparing mechanical and electromagnetic waves.

Question illustration
A
“Carry energy through space” and “Follow a pattern”
B
“Carry energy” and “Follow a pattern”
C
“Carry energy through space” and “Can be heard”
D
“Carry energy” and “Can be heard”

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