Year 7 physics revision

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Speed of light

300000000m/s

Gravity

A non contact force

Force

Can make an object change direction, speed or shape.

7

Days of a week

365 1/4

Days to orbit the sun

Air resistance

Drag force

Primary colour

Green

Pupil

Hole that lets light through

24

Hours in a day

Refraction

Light bends when it enters something more dense.

Ossicles

Little bones in the ear

Newton

Measurement of force

Oscilloscope

Measures sound waves

Moon

Natural satellite

Iris

Part of the eye that focuses light

Retina

Part of the eye that senses light

Luminous

Produces light

Tension

The force in a cord.

Pitch

The frequency of the wave

Hz

Waves per second

Vibrations

What makes sounds

Sun

A star

Weight

Force= mass x gravity

Amplitude

How loud something is

Light

Only travels in straight lines

Secondary colour

Yellow


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