Question

To check the conductivity of a few liquids.

Can you tell me that which in the below conduct electricity and which do not.

Vinegar, Milk, Oil, Honey, Tap Water and Orange juice

Answer 1

Vinegar, milk, honey, has acids and conduct electricity.
Oil is an insulator.
Tap water contains salt and orange juice contains acid. So they also conduct electricity.

You can also verify through the followin activity.

Metals are good conductors, most other materials are insulators (materials which do not allow electricity to flow through them).Some materials allow electric currents to flow through them and are not metals (e.g. the pencil and the bendy pencil - carbon)ActivityDiscussion

View apparatus list

To each group of 4 children, hand out a bag of components which form a circuit to light a lamp.

Also hand out a collection of items made of different materials.

Ask the children to complete the circuit to light the lamp and then disconnect the circuit at one point and connect in an item made of a material to be investigated.

View safety notes

Discuss which items are good conductors.

Discuss the materials the items are made of.

Point out that the lamp is not bright in some cases- e.g. with the bendy pencil.

(A sheet could be given to each group to record their results but with young