TOPIC: WATER CONTAMINATION
A: TEACHING AND LEARNING MATERIALS
- Picture of clean water.
- Picture of dirty water.
- Pictures of refuse in water.
- Pictures of dirty containers.
- Safety flashcards.
B: REFERENCE MATERIALS
- Scheme of work.
- Recommended Agric Sciences textbook for Primary 1.
- Online educational resources.
C: PREVIOUS KNOWLEDGE
The pupils have learnt about the sources and uses of water.
D: PERFORMANCE OBJECTIVES
By the end of the lesson, pupils should be able to:
- Explain water contamination in simple words.
- Identify clean and dirty water.
- Mention ways water becomes contaminated.
- State why refuse should not be thrown into water.
- Explain the importance of protecting water sources.
E: CONTENT
Meaning of Water Contamination
Water contamination means making water dirty and unsafe. Dirty water may contain harmful substances.
How Water Becomes Contaminated
Water can become dirty when:
- Refuse is thrown into it.
- Human waste enters it.
- Animal waste enters it.
- Dirty containers are used to collect it.
- Oil or chemicals enter it.
Refuse in Water
🗑️ + 💧 = dirty water We should not throw rubbish into rivers, streams or wells.
Dirty Containers
Water kept in a dirty bucket or cup can become unsafe.
Protecting Water Sources
We should:
- Keep wells covered.
- Keep water containers clean.
- Avoid throwing waste into water.
- Keep animals away from drinking-water sources.
F: LESSON PRESENTATION
F1: Teachers’ Activities
- Shows pictures of clean and dirty water.
- Explains water contamination.
- Discusses how water becomes dirty.
- Shows examples of unsafe practices.
- Teaches pupils how to protect water sources.
F2: Pupils’ Activities
- Identify clean and dirty water.
- Mention causes of water contamination.
- State why refuse should not enter water.
- Mention ways of protecting water.
- Answer oral questions.
G: CONCLUSION
The teacher reminds pupils that clean water should be protected from dirt, waste and harmful substances.
H: EVALUATION GUIDE
Pupils should be able to answer the following questions:
- What is water contamination?
- Mention two ways water becomes dirty.
- Should refuse be thrown into a river?
- Can a dirty bucket contaminate water?
- Mention two ways of protecting water sources.