A simple circuit is a complete loop: a battery (cell), wires and a bulb. When the loop is complete, electricity flows and the bulb lights. Year 3 scientists build circuits, use switches and find out which materials let electricity through.
Apa yang akan dipelajari anak anda
- Name the parts of a simple circuit: cell, wires, bulb, switch, buzzer and motor
- Know that a circuit must be a complete loop
- Know how a switch opens and closes a circuit
- Sort materials into conductors and insulators
Conductors and insulators
Metals are conductors: they let electricity flow through them. Plastic, wood, rubber and glass are insulators: they stop it. That’s why wires are metal on the inside and plastic on the outside.
Adding more batteries makes a bulb brighter. Adding more bulbs to the same battery makes them dimmer, because they share the electricity.
Contoh soalan
Berikut ialah beberapa soalan seperti dalam misi pertama. Bolehkah anda menjawabnya?
1. Which part could you add to make something spin?
- A bulb
- A motor
- An eraser
- A buzzer
Tunjuk jawapan
Jawapan: A motor. A motor turns electricity into movement.
2. What does a bulb need to light up?
💡- A broken wire
- A complete circuit
- Water
- A magnet
Tunjuk jawapan
Jawapan: A complete circuit. Electricity only flows around a complete loop.
3. What does a switch do?
- Opens and closes the circuit
- Makes sound
- Makes the bulb bigger
- Stores electricity
Tunjuk jawapan
Jawapan: Opens and closes the circuit. A switch makes or breaks the loop.
Tip untuk orang dewasa
- Use a battery, wires and a bulb to test which household objects are conductors.
- Take apart a broken torch and find the circuit inside (with an adult).
- Only ever experiment with small batteries — never mains electricity.