Waves Test

Question 1

What are waves?

Answer 1

any disturbance that transmits energy through matter or space. (only carry energy, not matter)

Question 2

What are mechanical waves?

Answer 2

waves that do require a medium to travel. they only travel through the medium, the wave does not take the medium with it.

Question 3

What is a medium?

Answer 3

the mode of transportation for a wave. (solid, liquid, gas or combo)

Question 4

What is a transverse wave?

Answer 4

particle movement is perpendicular to the direction of the wave. (have crests and troughs)

Question 5

crest

Answer 5

uppermost part of a transverse wave

Question 6

trough

Answer 6

lowest part of transverse wave

Question 7

amplitude

Answer 7

height of a wave from the rest line/rest position

Question 8

wavelength

Answer 8

length of a wave; distance between 2 successive points on a wave

Question 9

what does lambda stand for?

Answer 9

wavelength

Question 10

frequency

Answer 10

how many times a wave repeats itself in 1 second, (Hertz)

Question 11

what is a longitudinal wave?

Answer 11

particle moment is parallel to the direction of the wave (slinky, sound waves)

Question 12

What do longitudinal waves have? (not crests and troughs)

Answer 12

compressions and rarefactions

Question 13

compression

Answer 13

squishes

Question 14

rarefaction

Answer 14

stretches

Question 15

What are Electromagnetic waves?

Answer 15

• waves that make up the electromagnetic spectrum.

- does not require a medium

Question 16

what is sound?

Answer 16

a longitudinal, vibratory disturbance that travels in a medium and can be heard by the human ear

Question 17

Does sound or light travel faster?

Answer 17

light

Question 18

What does sound travel fastest through?

Answer 18

(in order) solids, then liquids, then gases

Question 19

what is pitch?

Answer 19

our way of differentiating between frequencies

Question 20

High pitch= ?

Answer 20

high frequency

Question 21

low pitch= ?

Answer 21

low frequency

Question 22

what is loudness?

Answer 22

our perception of energy in a sound

Question 23

What are forced vibrations?

Answer 23

forcing the vibration onto the board (music box demo)

Question 24

what are sympathetic vibrations?

Answer 24

frequency of A and B are equal; when A vibrates, it causes B to vibrate too (tuning fork)

Question 25

what is resonance?

Answer 25

when one object vibrating at the same natural frequency of a second object causes the 2nd object to vibrate (when frequencies match up)

Question 26

what is natural frequency?

Answer 26

the specific frequency that all things vibrate

Question 27

what is reflection?

Answer 27

the bouncing (or reflection) of a wave

Question 28

what is the reflection of sound?

Answer 28

echo

Question 29

what is refraction?

Answer 29

the bending of a wave due to a change in the medium (or due to a change of medium)

Question 30

what is diffraction?

Answer 30

bending of waves around a barrier

Question 31

what is interference?

Answer 31

when 2 or more waves interact

Question 32

constructive interference

Answer 32

2 waves going in the same direction create 1 larger wave

Question 33

destructive interference

Answer 33

2 waves going in opposite directions cancel each other out

Question 34

what is the doppler effect?

Answer 34

the change in frequency due to the motion of the source (or receiver)

Question 35

What is the speed of light?

Answer 35

3.0 x 10^8 m/s

Question 36

Speed of sound shouldn’t be confused with what??

Answer 36

Clarity of sound

Question 37

What makes speed of sound vary?

Answer 37

Temperature