Waves sound+general

Question 1

What do waves do?

Answer 1

Waves transmit energy

Question 2

What is a medium

Answer 2

It is something that mechanical waves need to transmit energy through eg. Water, air

Question 3

What types of waves do not require a medium?

Answer 3

Non-mechanical waves
eg.
Light waves

Question 4

How do light waves travel in space.

Answer 4

They travel through the vacuum.

Question 5

What is a transverse wave

a. Wavy
b. Compressions

Answer 5

a. Wavy

Question 6

What is a longitudinal wave

a. Wavy
b. Compressions

Answer 6

b. Compressions

Question 7

What is the tip of a wave called?

Answer 7

Peak/crest

Question 8

What is the lowest part of a wave called?

Answer 8

Trough

Question 9

What is the centre line in the wave called?

Answer 9

Line of propagation

Question 10

What is the length from the line of propagation to the peak/trough called?

Answer 10

Amplitude

Question 11

What is the most spread out part of a longitudinal wave called?

Answer 11

RareFACTION

Question 12

What is the most closely bundled together part of the wave called

Answer 12

Compression

Question 13

4 examples of transverse waves.

Answer 13

Light, micro, radio, water

Question 14

3 examples of longitudinal waves

Answer 14

Seismic, sound, ultrasound

Question 15

Sound travels at what in classroom

Answer 15

330m/s

Question 16

What is the SI unit for decibels

Answer 16

dB

Question 17

What are sounds that we don’t want to hear called

Answer 17

Noise

Question 18

A sound with a _________________ will sound louder

Answer 18

Higher intensity

Question 19

At what decibel is a jet plane

Answer 19

150

Question 20

Mechanical drill

Answer 20

120

Question 21

Industrial noise

Answer 21

110

Question 22

Stereo music

Answer 22

100

Question 23

Inside car

Answer 23

90

Question 24

Office

Answer 24

70

Question 25

Home

Answer 25

60

Question 26

Wind turbines

Answer 26

50

Question 27

Bedroom

Answer 27

30

Question 28

Falling leaves

Answer 28

20

Question 29

What damages your ears

Answer 29

The number of decibels and length of a sound

Question 30

What are the odds of suffering hearing loss

Answer 30

1 in 5

Question 31

Types of hearing loss and eg.

Answer 31

Temporary Cold loud sounds that perforated your eardrum Permanent From birth or if ear is damaged/diseases

Question 32

How can we reduce risk of damaging our ears

Answer 32

by: shielding increasing distance reducing time spent

Question 33

What device allows you to view sound waves and describe

Answer 33

Oscilloscope | Sound waves produced from microphone.

Question 34

``` Human range of hearing Total amount Child Middle aged Old ```

Answer 34

20Hz-20 000Hz 20Hz-24 000Hz 20Hz-16 000hz 20Hz-8 000Hz

Question 35

What is a frequency higher than 20 000Hz and who can hear it

Answer 35

Ultrasound | Bats, cats, dogs.

Question 36

What is a frequency lower than 20 Hz and who can hear it

Answer 36

Infrasound | Elephants