Activate 1 Chapter 2 Physics Sound

Question 1

What is the amplitude of a wave?

Answer 1

Distance from the middle to the top/bottom of the wave

Question 2

What is the wavelength of a wave?

Answer 2

The distance between a point and another point on a wave

Question 3

What is the trough of a wave?

Answer 3

The bottom of a wave

Question 4

What is the peak of a wave?

Answer 4

The top of the wave

Question 5

What is the alternative name for the peak?

Answer 5

The crest

Question 6

Which Greek letter is used to represent the wavelength?

Answer 6

λ (lambda)

Question 7

What is the frequency of a wave?

Answer 7

How many waves go past a certain point in a second

Question 8

What is the unit of measurement used to describe a frequency of a wave?

Answer 8

Hertz (Hz) or kilohertz (kHz)

Question 9

What do waves carry?

Answer 9

Waves carry energy

Question 10

What do we call when two waves meet?

Answer 10

They superpose

Question 11

In a transverse wave, the …(1) are perpendicular to the …(2) transfer. Fill in the dots

Answer 11

(1) oscillations
(2) energy

Question 12

What do we call in a longitudinal wave the areas that the particles are farer apart?

Answer 12

Rarefactions

Question 13

How is sound produce?

Answer 13

Through vibrations

Question 14

Sound is a transverse wave. Vrai ou faux?

Answer 14

Faux

Question 15

The speed of sound is the slowest in gas. Σωστό ή λάθος?

Answer 15

Σωστό

Question 16

What do we call the waves that are hitting the surface?

Answer 16

The incident wave

Question 17

What is ultrasound?

Answer 17

Ultrasound is waves that have a frequency higher than 20kHz

Question 18

How can we observe sound waves?

Answer 18

Using an oscilloscope

Question 19

How is sound volume measured?

Answer 19

Using decibels (dB)

Question 20

What does the pinna do?

Answer 20

It directs sound into the auditory canal

Question 21

What does the auditory canal do?

Answer 21

It lets sound travel through it so that it can reach the eardrum

Question 22

What does the eardrum do?

Answer 22

It vibrates and passes vibrations to the ossicles

Question 23

What does the ossicles do?

Answer 23

It amplifies the sound

Question 24

What does the cochlea do?

Answer 24

It has thousands of tiny hair, which produce an electric signal to the auditory canal

Question 25

What doe the auditory nerve do?

Answer 25

It sends the electric signals to the brain

Question 26

How can hearing damage happen?

Answer 26

A hole in the eardrum, a build-up of wax, and loud sounds or injuries to the head.