Unit 6: Electricity

Name components 1–4 in the numbered circuit.

What is the function of component 4?

Why does the lamp light?

Why must a cutting tool point away from you?

How can you strip wire safely?

Why must you never touch bare wires connected to mains electricity?

Test materials with one 1.5 V cell, lamp, wires and crocodile clips. Include method, prediction table, fair-test controls and safety.

Did results support predictions? How should this be reported?

How did you make the test fair?

What pattern appears?

Did any material not fit the pattern?

Write a conclusion from the results.

Which workers need protection from electricity?

Why are lightning conductors made of copper?

What happens when salt is stirred into water?

How can you test whether a material conducts electricity or not?

Investigate pure water and salt water using the source apparatus. State the complete procedure, variables, predictions and safety.

Did results support your predictions?

Compare your results with others.

What conclusion can you make about water?