Describe temperature.

Describe heat.

Explain what specific latent heat is

Describe conduction, convection and radiation

Explain 4 ways a home can reduce heat energy loss

Explain why trapped air reduces heat energy loss

Describe the features of a transverse wave.

Explain diffraction

Arrange the electromagnetic spectrum in order by wavelength

Show how to calculate the speed of a wave.

Explain the advantages and disadvantages of using light, radio and electrical signals for communication

Describe and explain TIR

Explain what a laser is

Explain how a laser is used in a CD player

Explain how microwaves and infrared transfer energy

Explain how to reduce signal loss with microwaves

Explain how the signal from an infrared remote controls a device

Describe advantages of using digital signals

Describe advantages of using optical fibres

Explain how the properties of digital signals allow us to use digital TV and radio

Explain how long-distance
communication uses satellites and the ionosphere

explain the advantages of digital radio

describe how seismic waves help to model the Earth’s structure

Explain how the ozone layer protects the Earth from ultraviolet radiation

describe why the ozone layer is depleting and the effect this has

describe how the discovery of the ozone hole changed attitudes