Waves and Sound

Question 1

What is a wave?

Answer 1

A constant travelling disturbance that transfers and carries energy

Question 2

What is the crest?

Answer 2

The highest point on a wave

Question 3

What is the trough?

Answer 3

The lowest point on a wave

Question 4

What is the medium?

Answer 4

The substance/object the wave is going through

Question 5

What is hertz?

Answer 5

The unit of frequency per second

Question 6

What is the wavelength?

Answer 6

How long the wave is (measurement) from crest to crest or trough to trough

Question 7

What is the amplitude?

Answer 7

The distance between the crest/trough from the origin (middle of the wave)

Question 8

How do you find frequency?

Answer 8

1/Period

Question 9

What is the period?

Answer 9

How many seconds per wave

Question 10

What is the wave speed?

Answer 10

How fast the wave is travelling

Question 11

What is the frequency?

Answer 11

How many waves you get per second

Question 12

How to find the period?

Answer 12

1/Frequency

Question 13

How to find the wave speed?

Answer 13

Wavelength X Frequency (s=λ x f)

Question 14

What are the two types of waves?

Answer 14

Transverse and Longitudinal

Question 15

Longitudinal waves can go through __________, while transverse waves can only go through ______.

Answer 15

anything, solids

Question 16

What type of wave is a sound wave?

Answer 16

Longitudinal

Question 17

What do each of the wave types look like?

Answer 17

Transverse: Up and down, looks squiggly
Longitudinal: Straight, like a line

Question 18

Sound waves require a…

Answer 18

medium

Question 19

How does a smooth and rigid surface reflect?

Answer 19

It reflects very well. E.g. a cafeteria

Question 20

How does a soft and irregular surface reflect?

Answer 20

It reflects very poorly. E.g. a movie theatre

Question 21

What is refraction?

Answer 21

When the wave bends as it goes through a change in the medium

Question 22

What is diffraction?

Answer 22

The bending of a wave as it goes around the edge of an object, or through a hole

Question 23

What is the angle that sound comes in at when reflected called? (This was the graph that looks like a V)

Answer 23

It’s called incidence

Question 24

What is the angle that sound comes out at when reflected called? (This was the graph that looks like a V)

Answer 24

It’s called reflection

Question 25

The speed of sound depends on what? What substances is it faster or slower in?

Answer 25

The medium. It’s faster in water, and even faster through solid.