waves -unit 1 year 10

Question 1

what are the 4 types of waves?

Answer 1

longitudinal, transverse, mechanical and electromagnetic

Question 2

what is a longitudinal wave?

Answer 2

a longitudinal wave is a wave where the oscillations are parallel to the movement of energy transfer

Question 3

example of a longitudinal wave:

Answer 3

sound waves

Question 4

what is a transverse wave?

Answer 4

a transverse wave is where the oscillations are perpendicular to the direction of energy transfer.

Question 5

example of a transverse wave:

Answer 5

light waves

Question 6

specific example of a transverse wave:

Answer 6

ripples on a water surface

Question 7

what is the amplitude of a wave?

Answer 7

the amplitude is the maximum point of displacement in a wave

Question 8

what is the wavelength of a wave?

Answer 8

the wavelength is the distance between one point on a wave to the equivalent point on the next wave

Question 9

what is the frequency of a wave?

Answer 9

frequency is the amount of oscillations per second

Question 10

what is the period of a wave?

Answer 10

the period of a wave is the amount of time it takes for one wave to pass a point

Question 11

what is the equation for finding the period of a wave?

Answer 11

T = 1/f

Question 12

what is the equation for wave speed?

Answer 12

V = F x wavelength

Question 13

how is the pitch of a sound determined?

Answer 13

the pitch is determined by the frequency of a sound wave

Question 14

how is the loudness of a sound determined?

Answer 14

the loudness is determined by the amplitude of a sound wave

Question 15

what is an echo?

Answer 15

a sound wave being reflected

Question 16

sounds can travel through ___ which causes ______ in the ____

Answer 16

sounds can travel through SOLIDS which causes VIBRATIONS in the SOLIDS

Question 17

how do we hear (basic)

Answer 17

soundwaves cause the eardrum and other parts to vibrate which causes the sensation of sound

Question 18

what is the range of human hearing?

Answer 18

20Hz - 20,000Hz

Question 19

___ waves have a ____ _____ than the upper limit of hearing for humans

Answer 19

ULTRASOUND waves have a FREQUENCY HIGHER than the upper limit of hearing for humans

Question 20

in what way are ultrasound waves reflected?

Answer 20

ultrasound waves are partially reflected when they meet a boundary between two different media

Question 21

what are ultrasound waves used for?

Answer 21

medical and industrial imaging

Question 22

what method is used to detect objects in deep water and measure water depth?

Answer 22

echo sounding

Question 23

what is the echo sounding method

Answer 23

the way of using high frequency sound waves to detect objects and measure water depth

Question 24

what type of waves are produced by earthquakes?

Answer 24

seismic waves

Question 25

what are the types of seismic waves?

Answer 25

S- and P-

Question 26

what do seismic waves do?

Answer 26

provide evidence for the structure and size of the earths core

Question 27

what are P- seismic waves?

Answer 27

P- waves are longitudinal waves and travel at different speeds through solids and liquids

Question 28

what are S- seismic waves?

Answer 28

S- waves are transverse waves and cannot travel through liquids

Question 29

name three things that waves can be at the boundary between two different materials:

Answer 29

be reflected, be absorbed, be transmitted

Question 30

why does refraction happen?

Answer 30

refraction happens due to the difference in velocity of the waves in different substances

Question 31

what is wave speed (v) measured in?

Answer 31

metres per second (m/s)

Question 32

what is frequency (f) measured in?

Answer 32

hertz (Hz)

Question 33

what is wavelength (λ) measured in?

Answer 33

metres (m)