Conductors and insulators | isapconde | Live - Free Printable

Let’s go through each object one by one and decide if it’s a conductor (lets electricity pass) or an insulator (blocks electricity).

We’ll use simple rules:
- Metals like keys, coins, metal spoons → usually conductors.
- Plastic, paper, card, wood → usually insulators.
- Some foods like lemon and potato can conduct a little because they have water and acids — so we count them as weak conductors for this level.

Now let’s check each item:

1. pencil – The outside is wood (insulator), but the inside graphite core can conduct a little. In school tasks, pencils are often counted as conductors because of the graphite.
2. ruler – Usually plastic or wood → insulator
3. lemon – Has acid and water → conducts a bit → conductor
4. 2 Cents – Metal coin → conductor
5. Plastic spoon – Plastic doesn’t conduct → insulator
6. potato – Like lemon, has moisture and ions → conductor
7. Metal spoon – Metal → conductor
8. Piece of paper – Dry paper blocks electricity → insulator
9. key – Metal → conductor
10. Piece of card – Like paper → insulator
11. Plastic toy car – Plastic → insulator
12. Metal spoon – Again, metal → conductor
13. lemon – Same as before → conductor
14. key – Again, metal → conductor

Note: “lemon” and “key” appear twice — we treat them the same both times.

Final Answer:
- pencil → CONDUCTOR
- ruler → INSULATOR
- lemon → CONDUCTOR
- 2 Cents → CONDUCTOR
- Plastic spoon → INSULATOR
- potato → CONDUCTOR
- Metal spoon → CONDUCTOR
- Piece of paper → INSULATOR
- key → CONDUCTOR
- Piece of card → INSULATOR
- Plastic toy car → INSULATOR
- Metal spoon → CONDUCTOR
- lemon → CONDUCTOR
- key → CONDUCTOR