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Classifying stars by colour

Classifying stars by colour

Stars can be classified according to their colour and a star’s colour is related to its surface temperature. The colours ...

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Density and pressure

Density and pressure

Density Density is a measurement of the amount of mass per volume of the substance. It is vital that you ...

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Detecting ionising radiation

Detecting ionising radiation

Photographic film Henri Becquerel was the scientist who discovered the effects of radioactivity. Becquerel was conducting experiments to investigate the ...

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Distance-time graphs

Distance-time graphs

We have looked at the relationship between speed, distance and time, so now we can expand on these ideas using ...

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Electrical charge

Electrical charge

The creation of electrical charge is a fundamental part of electricity. Most electrical charge is produced due to the movement ...

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Electrical resistance

Electrical resistance

All components that have a circuit offer some resistance. This is because each component resists the flow of electricity to ...

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Electricity wires

Electricity wires

This part of the chapter focuses on the use of mains electricity. Electricity is used for many things that are ...

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Energy efficiency

Energy efficiency

Energy is used throughout our daily lives, in our homes, the buildings we work in and on our roads. This ...

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Electromagnetism

Electromagnetism

A magnetic field is also produced around any electrical conductor when current is flowing. For example, a magnetic field is ...

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Energy resources

Energy resources

We use energy in different forms every day to provide us with the necessities we need to survive such as ...

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Energy transfers

Energy transfers

Energy is measured in the unit joule (J) and is needed by all objects to change shape, size or position. ...

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