All experiments should be risk assessed to identify the hazards and minimise risks. Always follow teacher instructions and safety advice.
One way to do this is to use a table to identify the hazards, state the risks and suggest how to minimise the risks.
Take, for example, the practical for investigating whether an increase in the size of a solar panel increases the size of the voltage produced. This would involve shining a lamp on a solar panel from a fixed distance and measuring the voltage produced from a voltmeter.
The risk assessment for this experiment might look like this:
|Lamp||Burning||Be careful not to touch lamp when on. Turn off lamp between uses.|
|Electric components||Shocks||Check wires for bare ends, discard if found. Complete circuit before switching on lamp.|