PRIMARY 5: BASIC SCIENCE – THIRD TERM | WEEK 5

TOPIC: HEAT AND ENERGY – ENERGY CONVERSION

A: TEACHING AND LEARNING MATERIALS

1. Battery-powered torch.
2. Electric bulb.
3. Pictures of electrical appliances.
4. Candle.
5. Battery.
6. Charts showing different forms of energy.
7. Pupils’ notebooks and pencils.

B: REFERENCE MATERIALS

1. Scheme of work.
2. Recommended Basic Science textbook for Primary 5.
3. Online educational resources.

C: PREVIOUS KNOWLEDGE

The pupils have seen and used devices such as torches, electric bulbs and cooking appliances that use or produce different forms of energy.

D: PERFORMANCE OBJECTIVES

By the end of the lesson, pupils should be able to:

1. Define energy.
2. Mention common forms of energy.
3. Explain energy conversion.
4. Give examples of energy conversion.
5. Explain the conversion of electrical energy into heat and light.
6. Identify energy changes in common household devices.

E: CONTENT

Meaning of Energy

Energy is the ability to do work or cause change. We need energy for:

• Movement.
• Heating.
• Lighting.
• Cooking.
• Operating machines.

Forms of Energy

Common forms include:

• Heat energy.
• Light energy.
• Electrical energy.
• Chemical energy.
• Sound energy.
• Mechanical energy.

Meaning of Energy Conversion

Energy conversion is the change of energy from one form to another.

Examples of Energy Conversion

Electric Bulb

Electrical energy → Light energy + Heat energy 💡 Electricity produces light and some heat.

Electric Iron

Electrical energy → Heat energy

Torch

Chemical energy in battery → Electrical energy → Light energy 🔋 → ⚡ → 🔦

Candle

Chemical energy → Heat energy + Light energy

Importance of Energy Conversion

Energy conversion makes many everyday activities possible. For example:

• Electric irons produce heat for ironing.
• Bulbs provide light.
• Fans use electrical energy to produce movement.

F: LESSON PRESENTATION

F1: Teachers’ Activities

1. Explains the meaning of energy.
2. Identifies common forms of energy.
3. Demonstrates a torch or bulb.
4. Explains energy conversion.
5. Gives examples from household appliances.
6. Guides pupils to identify energy changes around them.

F2: Pupils’ Activities

1. Define energy.
2. Mention forms of energy.
3. Observe energy conversion in a torch.
4. Give examples of energy changes.
5. Identify appliances that produce heat or light.
6. Participate in class discussion.

G: CONCLUSION

The teacher revises the meaning, forms and conversion of energy. Pupils are encouraged to observe how energy changes from one form to another in everyday devices.

H: EVALUATION GUIDE

Pupils should be able to answer the following questions:

1. What is energy?
2. Mention four forms of energy.
3. What is energy conversion?
4. What energy conversion occurs in an electric iron?
5. What energy conversion occurs in a bulb?
6. Describe the energy conversion in a torch.
7. Give two other examples of energy conversion.