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Flashcards in science waves and sound Deck (99)
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1

the ability to do work

energy

2

a disturbance that transfers energy from place to place

wave

3

the material through which a wave travels

medium

4

What is the medium for sound waves?

air

5

What is the material through which water waves travel?

along the water surface

6

Waves that travel through a medium are what kind of waves? Does the medium move with the mechanical wave?

mechanical waves - no

7

Give an example of an electromagnetic wave that can travel through empty space.

light

8

What type of wave can travel without a medium?

electromagnetic waves - light

9

Why doesn't the medium travel with the wave?

The wave transfers the energy to the medium's particles.

10

What is necessary to cause a wave?

energy causes a medium to vibrate

11

What is vibration?

a repeated back and forth or up and down motion

12

What are the two types of mechanical waves, and how are they classified?

transverse waves - - moves at right angles to the direction the wave is traveling
longitudinal waves - move parallel to direction wave is traveling

13

What is the high point on a transverse wave?

crest

14

What is the low point on a transverse wave?

trough

15

What do we call the coils in a longitudinal wave that are closer together?

compressions

16

What do we call the coils in a longitudinal wave that are further apart?

rarefactions

17

Is sound a longitudinal or a transverse wave?

longitudinal

18

What is amplitude of a transverse wave?

the height of the crest or the depth of a trough

19

What is the amplitude of a longitudinal wave?

the density of the compression or how spread out the rarefaction

20

What increases the amplitude of a wave?

energy

21

What is the distance between two corresponding parts of a wave?
crest to crest or trough to trough or distance between compressions

wavelength

22

the number of waves that pass a given point in a certain amount of time

frequency

23

What unit is frequency measured in?

hertz (Hz), waves per second

24

What is the relationship between speed, wavelength, and frequency

speed = wavelength X frequency

25

What happens to the speed of a wave at a constant temperature and pressure if the medium doesn't change?

speed is constant

26

when an object or a wave hits a surface through which it cannot pass it bounces back and is called what

reflection

27

Give 2 examples of reflections.

ball bouncing off a wall
echo of sound

28

What is the law of reflection?

angle of incidence equals the angle of reflection

29

Where is the line of "normal?"

perpendicular

30

What is the angle of incidence?

from the incoming wave to "normal"