Waves Unit

Question 1

Wave

Answer 1

medium that carries energy without a net movement particles

Question 2

Medium

Answer 2

it can transmit energy

Question 3

Transverse wave

Answer 3

a wave that oscillates perpendicularly to the direction of the waves advance

Question 4

compressional wave

Answer 4

a wave that the movement of the medium or the vibration or disturbance within the medium

Question 5

sound waves

Answer 5

longitudinal waves that travel through a medium like air or water

Question 6

water waves

Answer 6

surface waves a mixture of longitudinal and transverse waves

Question 7

seismic waves

Answer 7

mechanical wave of acoustic energy that travels through the earth or another planetary body

Question 8

crest

Answer 8

the highest surface part of a wave

Question 9

troughs

Answer 9

the lowest point of a wave

Question 10

refraction

Answer 10

the change in direction of a wave passing from one medium to another

Question 11

wavelength

Answer 11

Distance between corresponding points of two consecutive waves

Question 12

frequency

Answer 12

the number of occurrences of a repeating event per unit of time

Question 13

amplitude

Answer 13

a measurement of amount of energy transferred by a wave

Question 14

refraction

Answer 14

the change in direction of a wave passing from one medium to another caused by its change in speed

Question 15

diffractions

Answer 15

the spreading of waves as the pass through or around an object

Question 16

interference

Answer 16

the net of the combination of two or more trains moving on intersecting or coincident paths

Question 17

standing wave

Answer 17

combination of two waves moving in opposite directions each having the same amplitude and frequency

Question 18

resonance

Answer 18

the occurrence of a vibrating object causing another object to vibrate a higher amplitude

Question 19

eardrum

Answer 19

a thin circular layer of tissue that separates your outer from you middle ear

Question 20

cochlea

Answer 20

a helix shaped structure located in the inner ear and is responsible for converting sound waves in electrical impulses of nerve cells

Question 21

intensity

Answer 21

the magnitude of a quanitity per unit area

Question 22

loudness

Answer 22

the subjective perception of sound pressure

Question 23

decibel

Answer 23

unit for expressing the ratio between two physical quantities usually amounts of acoustic or electric power from measuring the relative loudness of sounds

Question 24

pitch

Answer 24

describes how high or low a sound is

Question 25

ultrasonic

Answer 25

inaudible sound with high frequency for a human

Question 26

doppler effect

Answer 26

the increase in the frequency of sound , light , other waves as the source or observer move towards each other

Question 27

overtone

Answer 27

any resonant frequency above the fundamental frequency

Question 28

acoustics

Answer 28

the science that deals with the production,control,transmission, receptio and effects of sound

Question 29

echolocation

Answer 29

a technique used by animals such as bats dolphins and few species of birds to determine the location of objects using the reflection of sound waves

Question 30

sonar

Answer 30

sound navigation and ranging