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Question 1

Frequency

Answer 1

waves per second

Question 2

Frequency measurement

Answer 2

Hertz(Hz)

Question 3

wavelength

Answer 3

the length between one specific point in a wave and the same point in the next wave.

Question 4

Vibration/ocillations

Answer 4

A repeated back-and-forth or up-and-down motion

Question 5

Loudness

Answer 5

Human perception of sound intensity

Question 6

Pitch

Answer 6

How high or low a sound is

Question 7

what is pitch determined by

Answer 7

The number of vibrations per second or frequency determines the pitch of a sound. Frequency is directly proportional to pitch. Higher the frequency, the higher the pitch.

Question 8

Vacuum

Answer 8

A space where no particles of matter exist

Question 9

Decibel

Answer 9

a unit that compares the loudness of different sounds(dB)

Question 10

range of frequencies a person can hear

Answer 10

20-20000Hz

Question 11

What happens to a soundwave when you hear an echo?

Answer 11

The sound wave is reflected.

Question 12

The unit to measure frequency

Answer 12

Hertz(Hz)

Question 13

Which wave is fastest-light or sound?

Answer 13

Light

Question 14

Which wave is fastest-light in air or light in water?

Answer 14

Light in air

Question 15

Which wave is fastest-sound in air or sound in water?

Answer 15

Sound in water

Question 16

Which material lets all light through?

Answer 16

Transparent.

Question 17

Which material lets some light through?

Answer 17

Translucent

Question 18

Which material doesnt let any light through?

Answer 18

Opaque

Question 19

Low frequency =

High frequency =

Answer 19

low pitch

high pitch

Question 20

Loud =

Quiet =

Answer 20

large amplitude

small amplitude

Question 21

waves

Answer 21

Waves are oscillations or vibrations. All waves transfer energy.

Question 22

what happens to the matter around an on coming wave

Answer 22

The matter a wave passes through does not move from its position.

Question 23

Longitudinal waves

Answer 23

Longitudinal waves are oscillations that occur parallel to the direction of travel.

Question 24

what happens to particles in a longitudinal wave

Answer 24

In a longitudinal wave, the particles come close together and then push apart.

Question 25

what is it called when the particles are far apart

Answer 25

When the particles are far apart, this is called a rarefaction.

Question 26

what is it called when the particles are close together

Answer 26

When the particles are close together, this is called compression

Question 27

An example of a longitudinal wave

Answer 27

An example of a longitudinal wave is a sound wave.

Question 28

another name for longitudinal waves

Answer 28

Longitudinal waves are also called pressure waves.

Question 29

Transverse waves

Answer 29

Transverse waves occur when the oscillations are perpendicular or at right angles (90°) to the direction of travel.

Question 30

Examples of transverse

Answer 30

Examples of transverse waves include water waves and electromagnetic waves.

Question 31

wave speed calculation

Answer 31

Wave speed is calculated using the equation: Wave speed = frequency × wavelength. Wave speed is measured in m/s.

Question 32

Wavelength is measured in

Answer 32

metres (m)

Question 33

speed of light

Answer 33

Light travels at 300,000,000 m/s.

Question 34

speed of sound

Answer 34

Sound travels at 340 m/s in air.

Question 35

light

Answer 35

Travels as transverse waves. Light is electromagnetic radiation. Light can travel through a vacuum. It takes about eight minutes for the Sun’s light to reach us traveling at 300,000,000 m/s.

Question 36

Law of reflection

Answer 36

The law of reflection states: The angle of incidence equals the angle of reflection. We are able to see objects as light reflects off objects into our eyes. When reflection happens, it always follows the law of reflection

Question 37

distance equation

Answer 37

Distance = speed × time

Question 38

Peak or crest

Answer 38

the top of a wave.

Question 39

Trough

Answer 39

the bottom of a wave.

Question 40

Amplitude

Answer 40

the distance from the middle to the crest or trough of the wave.