Electricity Science Worksheet for Year 4 students, covering topics like mains electricity, electrical circuit components, and materials as conductors or insulators.

Let's go through each question on the Unit 5 – Electricity Science Worksheet and solve them step by step with explanations.

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Q1 - Tick (✓) the objects that use mains electricity.

We are given six images:

1. Electric kettle – ✔ Uses mains electricity (plugged into a wall socket).
2. Candle – ✘ Does not use electricity; it burns fuel (wax).
3. Washing machine – ✔ Uses mains electricity.
4. Remote control – ✘ Usually runs on batteries, not mains electricity.
5. Microwave oven – ✔ Uses mains electricity.
6. Flashlight (torch) – ✘ Powered by batteries, not mains electricity.

✔ Correct answers to tick:
- Electric kettle
- Washing machine
- Microwave oven

> So, tick the boxes under:
> - Kettle
> - Washing machine
> - Microwave

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Q2 - Label the different parts of an electrical circuit below.

The five components shown are:

1. Light bulb in a holder → Bulb
*(It emits light when current flows through it)*

2. Motor → Motor
*(Converts electrical energy into motion)*

3. Battery → Battery
*(Provides electrical energy; source of power)*

4. Bell → Bell
*(Makes sound when current flows through it)*

5. Wires with clips → Wires / Connecting wires
*(Carry electric current between components)*

> Labels:
> 1. Bulb
> 2. Motor
> 3. Battery
> 4. Bell
> 5. Wires

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Q3 - Are these materials electrical conductors or insulators? Complete the table.

| Material | Conductor | Insulator |
|--------|----------|-----------|
| Wood | | ✔ |
| Brass | ✔ | |
| Plastic | | ✔ |
| Glass | | ✔ |
| Paper | | ✔ |
| Copper | ✔ | |
| Silver | ✔ | |
| Chalk | | ✔ |

#### Explanation:

- Conductors: Materials that allow electricity to flow easily.
- Brass – Metal alloy → conducts electricity ✔
- Copper – Excellent conductor ✔
- Silver – Best conductor among metals ✔

- Insulators: Materials that resist electricity flow.
- Wood – Doesn’t conduct electricity ✔
- Plastic – Common insulator (used in wires) ✔
- Glass – Insulator (used in bulbs and insulators) ✔
- Paper – Insulator (dry paper doesn’t conduct) ✔
- Chalk – Made of calcium carbonate, insulating ✔

> Note: Some materials like wet wood or damp paper may conduct slightly, but in general science terms, they're classified as insulators.

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✔ Final Answers Summary:

#### Q1: Tick these:
- Electric kettle
- Washing machine
- Microwave oven

#### Q2: Labels:
1. Bulb
2. Motor
3. Battery
4. Bell
5. Wires

#### Q3: Table filled:

| Material | Conductor | Insulator |
|--------|----------|-----------|
| Wood | | ✔ |
| Brass | ✔ | |
| Plastic | | ✔ |
| Glass | | ✔ |
| Paper | | ✔ |
| Copper | ✔ | |
| Silver | ✔ | |
| Chalk | | ✔ |

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This worksheet helps students understand basic concepts of electricity: devices using mains power, circuit components, and material conductivity. Let me know if you'd like this turned into a printable answer key!