Science (waves)

What is a wave?

Transfer of energy, which is how energy gets from one point to another.

What do waves require?

A medium to travel through

How do sound waves travel to us?

They travel through a medium of air-the particles vibrate and don't follow the wave itself

What are the parts of the ear?

Pinna, Ear canal, Hammer, Anvil, Stirrup, Small bones, Eardrum, Cochlea, Auditory nerve

Sound levels?

Measured in decibels (dB) by a sound level meter

What are rays?

They highlight the direction of energy transfer

Transverse waves?

The oscillations are perpendicular to the direction of energy transfer

Longitudinal Waves?

Oscillations are parallel to the direction of energy transfer

Peak/Crest?

Highest point of a wave

Trough?

Lowest point of a wave

Compressions?

Area of high density in a longitudinal wave

Rarefractions?

Area of low density in a longitudinal wave

Amplitude?

The maximum displacement of a point

Frequency?

The number of waves passing a point each second measured in Hertz (Hz)

Wavelength?

The distance from any point on one wave to the same point on the next wave, measured in metres (m)

Wave speed

How far the wave travels in a certain time, measured in metres per second (m/s)

Wavefronts?

A line that joins all the points of a wave that are doing the same thing at the same time

Refraction?

The change in direction (when the wave has a change in speed) as it goes from one medium to another

Reflection?

The bouncing back of a wave when it hits a surface through which it cannot pass

Echo?

a reflected sound wave from It's surface

speed=

distance/time