Waves

Question 1

Wave

Answer 1

A repeating disturbance or movement that transfers energy through matter or space

Question 2

Medium

Answer 2

The matter the waves travel through

Question 3

Transverse wave

Answer 3

Where matter in the medium moves back and forth at right angles to the direction that the wave travels

Question 4

Compressional wave

Answer 4

Where matter in the medium moves back and forth along the same direction that the wave travels

Question 5

Sound waves

Answer 5

When something makes noise, it creates vibrations which push the air molecules around it to create a sound wave

Question 6

Water waves

Question 7

Seismic waves

Question 8

Crests

Answer 8

High points in a transverse wave

Question 9

Troughs

Answer 9

Low points in a transverse wave

Question 10

Rarefraction

Answer 10

The less dense region of a compressional wave

Question 11

Wavelength

Answer 11

The distance between one point on a wave and the nearest point just like it

Question 12

Frequency

Answer 12

The number of wavelengths that pass a fixed point each second

Question 13

Amplitude

Answer 13

How tightly the medium is pushed together at the compressions

Question 14

Refraction

Answer 14

The bending of a wave caused by a change in its speed

Question 15

Diffraction

Answer 15

It occurs when an object causes a wave to change direction and bend around it

Question 16

Interference

Answer 16

When two or more waves overlap and combine to form a new wave

Question 17

Standing wave

Answer 17

A special type of wave pattern that forms when waves equal in wavelength and amplitude but traveling in opposite direction continuously interfere with each other

Question 18

Resonance

Answer 18

The process by which an object is made to vibrate by absorbing energy at its natural frequencies

Question 19

Eardrum

Answer 19

A tough membrane about 0.1 mm thick

Question 20

Cochlea

Answer 20

A spiral shaped structure that is filled with liquid and contains tiny hair cells

Question 21

Intensity

Answer 21

The amount of energy that flows through a certain area in a specific amount of time

Question 22

Loudness

Answer 22

The human perception of intensity

Question 23

Decibel

Answer 23

The unit used for sound intensity

Question 24

Pitch

Answer 24

How high or low a sound seems to be

Question 25

Ultrasonic

Answer 25

Sound frequencies over 20,000 Hz

Question 26

Doppler effect

Answer 26

The change in pitch or wave frequency due to a moving wave source

Question 27

Music

Answer 27

It is made of sounds that are deliberately used in a regular pattern

Question 28

Sound quality

Answer 28

It describes the differences among sounds of the same pitch and loudness

Question 29

Overtone

Answer 29

A vibration whose frequency is a multiple of the fundamental frequency

Question 30

Resonator

Answer 30

an apparatus that increases the resonance of a sound, especially a hollow part of a musical instrument.

Question 31

Acoustics

Answer 31

the properties or qualities of a room or building that determine how sound is transmitted in it.

Question 32

Echolocation

Answer 32

the location of objects by reflected sound, in particular that used by animals such as dolphins and bats.

Question 33

Sonar

Answer 33

a system for the detection of objects under water and for measuring the water’s depth by emitting sound pulses and detecting or measuring their return after being reflected.