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

GENERAL INFORMATION

BASIC SCIENCE

BASIC SCIENCE AND TECHNOLOGY

FIRST TERM  

WEEK 10

PRIMARY 3 

THEME – LEARNING ABOUT OUR ENVIRONMENT 

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

 

TOPIC – WATER PURIFICATION 

LEARNING AREA

1. Introductory Activities

2. Purification of Water by:

• Boiling

• Use of Alum

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 boiling and use of Alum.

3. demonstrate water purification by boiling and use of alum.

ENTRY BEHAVIOUR

Clean and dirty water

INSTRUCTIONAL MATERIALS

The teacher will teach the lesson with the aid of:

1. Clean and dirty water

2. Cooking pot

3. Stove

4. Alum

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 boiling and use of alum 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 boiling and use of alum. 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 

The remaining two (2) are –

1. Boiling

• Boiling water can kill germs and makes it safe for drinking, cooking, etc.

2. The use of alum

• Alum is a non toxic substance that is commonly used in treatment of contaminated water.

 

LESSON 2 – PRACTICAL DEMONSTRATION OF WATER PURIFICATION BY BOILING AND USE OF ALUM

Teacher’s Activities – Guide the pupils to use boiling and alum 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 boiling and the use of alum.

Pupil’s Activities – Active participation and practical demonstration of water purification by boiling and alum.

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 –

LESSON EVALUATION 

Pupils to:

1. explain water purification.

2. state 4 methods of water purification.

3. identify and name purification of water by boiling and use of alum.

4. demonstrate water purification by boiling and use of alum.

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. _________________ is a non toxic substance that is commonly used in treatment of water.

A. Boiling

B. Alum

C. Chlorine

3. _________________ water can kill germs and makes it safe for drinking, cooking, etc.

A. Boiling

B. Alum

C. Chlorine

 

Name 4 simple methods of water purification.

 

4. _________________

5. _________________

 

6. _________________

 

7. _________________

 

8. Differentiate between boiling and use of alum.

 

______________________________________________________________

 

______________________________________________________________

 

______________________________________________________________

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

 

9. Score on water purification by boiling.

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