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