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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
