Quiz about Week 28 - Chapter 20 Sound

Question 1

Sound travels in a _____.

Accepted Answer

wave

Answer

boat

Answer

straight line

Answer

particle

Question 2

A sonic boom happens when two planets collide.

Accepted Answer

unknown

Answer

yes

Answer

no

Question 3

The cracking of a whip is actually the tip breaking the sound barrier.

Accepted Answer

true

Answer

false

Question 4

Sound waves travel faster in solids than in gases.

Accepted Answer

True

Answer

False

Question 5

What happens when something travels faster than the speed of sound?

Accepted Answer

A sonic boom

Answer

Nothing happens

Answer

Nothing can travel faster than the speed of sound

Question 6

When wavelength is large...

Accepted Answer

frequency is small.

Answer

frequency is large.

Answer

There is no relationship between wavelength and frequency.

Question 7

'Supersonic speed' is dependent on the medium in question.

Accepted Answer

True

Answer

False

Question 8

What is the unit for frequency?

Accepted Answer

Hertz

Answer

Maxwell

Answer

Wave

Answer

Amplitude

Question 9

A musician is playing a low-pitched recorder. Which of the following statements is true about his instrument?

Accepted Answer

The instrument is likely large.

Answer

The instrument is likely small.

Answer

The musician must blow harder to achieve sound.

Answer

The instrument is pink.

Question 10

Do sound waves oscillate parallel to or perpendicular to the direction in which the wave travels?

Accepted Answer

Parallel

Answer

Perpendicular

Answer

The waves are random

Question 11

Which waves have the longest wavelength?

Accepted Answer

Infrasonic waves

Answer

Sonic waves

Answer

Ultrasonic waves

Answer

Wavelengths are all the same

Question 12

_____ is the highness or lowness of a sound.

Accepted Answer

Pitch

Answer

Sonic boom

Answer

Amplitude

Answer

Frequency

Question 13

The distance between crests is called the wavelength.

Accepted Answer

True

Answer

False

Question 14

Sound is a _______.

Accepted Answer

longitudinal wave

Answer

transverse wave

Answer

Hertz wave

Question 15

Sound waves with low pitch have ___ frequency. Sound waves with high pitch have ___ frequency.

Accepted Answer

low, high

Answer

high, low

Answer

high, high

Answer

low, low

Question 16

Any speed that is faster than the speed of sound in the substance of interest is called ______.

Accepted Answer

supersonic speed

Answer

speed of light

Answer

sonic boom

Answer

transverse wave

Question 17

An indication of how high or low a sound is which is primarily determined by the frequency of the sound wave.

Accepted Answer

pitch

Answer

volume

Answer

wavelength

Answer

amplitude

Question 18

All sounds begin with vibrating matter.

Accepted Answer

Answer

<p>False</p>

Question 19

The distance between two crests is called the amplitude (A).

Accepted Answer

False

Answer

True

Question 20

The crest is the ___________ point in the wave.

Accepted Answer

highest

Answer

lowest

Answer

middle

Question 21

We hear thunder after we see lightning because sound travels faster than light.

Accepted Answer

False

Answer

True

Question 22

The Doppler affect applies to ______.

Accepted Answer

Any moving object that creates sound.

Answer

Only stationary objects that make sound.

Answer

Only moving vehicles that create sound.

Answer

Any stationary object that emits light.

Question 23

Sounds over ____ decibels can cause damage to human ears.

Accepted Answer

130

Answer

10

Answer

1030

Answer

3000

Question 24

Bats and porpoises both use sonar.

Accepted Answer

True

Answer

False

Question 25

________ surfaces produce the best echoes.

Accepted Answer

Hard

Answer

Soft

Answer

Round

Answer

Rough

Week 28 - Chapter 20 Sound

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