Purification of Water by Improvisation and Use of Chemical Primary 3 (Basic 3)

GENERAL INFORMATION

BASIC SCIENCE

BASIC SCIENCE AND TECHNOLOGY

FIRST TERM  

WEEK 9 

PRIMARY 3 

THEME – LEARNING ABOUT OUR ENVIRONMENT 

PREVIOUS LESSON – Substances that Contaminate Water | Ways of Preventing Contamination of Water Primary 3 (Basic 3)

 

TOPIC – WATER PURIFICATION 

LEARNING AREA

1. Introductory Activities

2. Purification of Water by:

• Improvisation

• Use of Chemical

3. Lesson Evaluation and Weekly Assessment

PERFORMANCE OBJECTIVES 

By the end of the lesson, the pupils should have attained the following objectives (cognitive, affective and psychomotor) and should be able to –

1. explain water purification.

2. identify and name purification of water by improvisation and use of chemicals.

3. demonstrate water purification by improvisation and use of chemical.

ENTRY BEHAVIOUR

Clean and dirty water

INSTRUCTIONAL MATERIALS

The teacher will teach the lesson with the aid of:

1. Clean and dirty water

2. Filter and Chemical for purification

METHOD OF TEACHING

Choose a suitable and appropriate methods for the lessons.

Note – Irrespective of choosing methods of teaching, always introduce an activities that will arouse pupil’s interest or lead them to the lessons. 

REFERENCE MATERIALS

1. Scheme of Work

2. 9 – Years Basic Education Curriculum

3. Course Book

4. All Relevant Material

5. Online Information

 

WRITING INSTRUCTION 

Copy as I write or draw as I write. This instruction should be given when you need the pupils to write or draw.

CONTENT OF THE LESSON  

LESSON ONE – INTRODUCTORY ACTIVITIES 

Teacher’s Activities – Display chart showing different stages of water purification by improvisation and use of chemical for pupils in their respective groups to examine and discuss.

Pupil’s response – Active participation and discussion in the group’s work.

Teacher’s remark – There are many ways of purifying water. The chart shown water purification by improvisation – the use of filtration and use of chemical – chlorine. Discuss and demonstrate these methods.

MEANING OF WATER PURIFICATION 

Water purification is the removal contaminants from water in order make water fit for drinking, cooking, bathing, etc.

TYPES OF WATER PURIFICATION 

There are four (4) simple methods of water purification –

1. The improvisation – filtration

• Filtration is the use of physical barrier to remove unwanted substance from contaminated. It is also involved sieving.

2. The use of chemical – chlorine

• The use of chemical is the process adding chlorine to water to kill bacteria, viruses and other microbes in water.

Others are boiling and the use of alum.

 

LESSON 2 – PRACTICAL DEMONSTRATION OF WATER PURIFICATION BY IMPROVISATION (FILTRATION) AND USE OF CHEMICAL (CHLORINE) 

Teacher’s Activities – Guide the pupils to use filtration and chlorine to purify water.

Pupil’s response – Response to the teacher’s instructions.

Teacher’s remark – Celebrate their active participation.

LESSON 3 – REVISION AND WEEK LESSON ASSESSMENT 

As stated in performance objectives or lesson evaluation. 

PRESENTATION

To deliver the lesson, the teacher adopts the following steps:

1. To introduce the lesson, the teacher revises the previous lesson. Based on this, he/she asks the pupils some questions;

2. Discuss water purification by filtration and the use of chlorine.

Pupil’s Activities – Active participation and practical demonstration of water purification by filtration and chlorine.

CONCLUSION

To conclude the lesson for the week, the teacher revises the entire lesson and links it to the following week’s lesson.

Next Lesson – Purification of Water by Boiling and Use of Alum Primary 3 (Basic 3)

LESSON EVALUATION 

Pupils to:

1. explain water purification.

2. state 4 methods of water purification.

3. identify and name purification of water by improvisation and use of chemicals.

4. demonstrate water purification by improvisation and use of chemical.

WEEKLY ASSESSMENT

ATTEMPT ALL THE QUESTIONS

1. _________________ is the removal contaminants from water in order make water fit for drinking, cooking, bathing, etc.

A. Water quality

B. Water contamination

C. Water purification

2. Water purification by improvisation involves _________________.

A. the use of filtration

B. The use of chemical

C. the use of alum

3. Water purification by the use of chemical involves _________________.

A. the use of filtration

B. The use of chemical

C. the use of alum

 

Name 4 simple methods of water purification.

 

4. _________________

5. _________________

 

6. _________________

 

7. _________________

 

8. Differentiate between filtration and use of chlorine.

 

______________________________________________________________

 

______________________________________________________________

 

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Practical demonstration of water purification based lesson 3 to score the pupils.

 

9. Score on water purification by filtration.

10. Score on water purification by the use of chlorine.