Meaning of Water Evaporation and Water Condensation Primary 4 (Basic 4)

GENERAL INFORMATION

BASIC SCIENCE

BASIC SCIENCE AND TECHNOLOGY 

SECOND TERM 

WEEK 7

PRIMARY 4

THEME –  LEARNING ABOUT OUR ENVIRONMENT 

 PREVIOUS LESSON – PESTS AND DISEASES OF CROP PLANTS

TOPIC – WATER EVAPORATION AND CONDENSATION 

LEARNING AREA

1. Introductory Activities

2. Meaning of Water Evaporation

3. Meaning of Water Condensation

4. 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. identify pure water as a liquid with no colour, taste and odour.

2. observe that heated water can disappear as steam.

3. observe that steam can change back to water.

4. observe that water can change to ice (solid).

ENTRY BEHAVIOUR

Water

 

INSTRUCTIONAL MATERIALS

The teacher will teach the lesson with the aid of:

1. Water and other liquids.

2. Source of heat.

3. Containers for displaying and boiling water.

4. A cool flat surface.

5. Ice block

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

Scheme of Work

9 – Years Basic Education Curriculum

Course Book

All Relevant Material

Online Information

WRITING INSTRUCTIONS

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

 

CONTENT OF THE LESSON  

LESSON 1 – INTRODUCTORY ACTIVITIES

Teacher’s Activities – Display a bowl of water or pure water for the pupils to identify its colour. Tell its taste and odour by tasting and smelling.

Pupil’s activities and response – Colour – white as in their opinion, no odour and smell.

Teacher’s remark – Water is colourless, tasteless and natural occurring smell or odour. A great cheer for their active participation and quick response. Ask and discuss the importance of water.

 

On board, copy as I write.

IMPORTANCE OF WATER

Water is very important to plants and animals including man for –

1. survival

2. breakdown foods

3. regular body temperature

4. cooking

5. bathing

6. water clothes and plate

7. growing crops

8. transportation

9. commercial purposes.

LESSON 2 – WATER EVAPORATION 

Teacher’s Activities – Ask the pupils, what has happened to the water in the below mentioned instances?

• 1. Drying clothes in the sun.

• 2. Continue boiling of water in an open pot.

• 3. Ironing wet clothes.

• 4. Dry wet ground after rainfall.

• 5. Dry body after bathing.

Pupil’s response – Quick response to the above instances.

Teacher’s remark – The water in liquid state, has been heated by the sun and turned to water vapour (steam). That’s, the water escapes into the air, this is called water evaporation. A great cheer for quick response.

On board, copy as I write.

MEANING OF WATER EVAPORATION 

Evaporation is how water escapes into the air as water vapour (steam). That’s, water change to steam.

WATER CONDENSATION 

Teacher’s Activities – Guide the pupils on activities on water condensation by following the set of instructions.

• 1. Boil water in an open pot for 20 minutes.

• 2. What did you you observe coming out of the pot? ______________

• 3. Gently place the cover on the pot for 5 minutes and remove the cover.

• 4. What do you notice on the inside of the cover? Water

• 5. How did the water get there?

Teacher’s remark – The process where the steam becomes water is called condensation. For active participation, give a great cheer.

On board, copy as I write.

MEANING OF WATER CONDENSATION 

Water condensation is how the water vapour (steam) becomes water. That’s, steam changes to water.

LESSON 3 – REVISION AND LESSON EVALUATION/ASSIGNMENT 

As stated in the performance objectives or lesson evaluation. 

 

PRESENTATION

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

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

1. Displays water and other liquids in bowls in the class.

Pupil’s Activities – Observe water and other liquids displayed by teacher and discuss in term of colour, taste and odour.

2. Demonstrates Evaporation.

Pupil’s Activities – Observe teacher’s demonstration on evaporation.

3. Demonstrates condensation.

Pupil’s Activities – Observe teacher’s demonstration on evaporation.

4. Leads class discussion and initiates active participation of pupils.

Pupil’s Activities – Pupils participate actively, making suggestions.

5. Presents ice blocks to pupils and guide them to understand that the ice block is frozen water.

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 – The Feeding System – Teeth, Tongue and Lips

LESSON EVALUATION 

Pupils to:

1. list two features that identify a liquid as water.

2. state at least one change that would be observed when water is heated.

3. state at least one change that would be observed when steam condenses.

4. state one change that would be observed when water freezes.

WEEKLY ASSESSMENT 

ATTEMPT ALL THE QUESTIONS 

1. ______________ is how water escapes into the air as water vapour.

A. Water condensation

B. Water consumption

C. Water evaporation

2. ______________ is how the water vapour (steam) becomes water.

A. Water condensation

B. Water consumption

C. Water evaporation

3. ______________ is colourless, tasteless and natural occurring smell or odour.

A. Water

B. Tea

C. Oil

4. What is water condensation?

 

5. What is water evaporation?