Existence of Air – Meaning and Properties of Air | Uses of Air Primary 2 (Basic 2) Term 3 Week 5 Basic

 

BASIC SCIENCE

BASIC SCIENCE AND TECHNOLOGY 

THIRD TERM 

WEEK 5 

PRIMARY 2

THEME – OUR ENVIRONMENT 

PREVIOUS LESSON – Colour Identification | Classification of Colours Using Objects | Uses of Colours Primary 2 (Basic 2) Term 3 Week 4 Basic Science and Technology

 

TOPIC – EXISTENCE OF AIR 

 

LEARNING AREA

1. Introduction

2. Existence of Air

3. Meaning and Properties of Air

4. Things that Contain Air

5. Importance (Uses) of Air

6. Revision and Weekly Assessment (Test)

 

 

LEARNING OBJECTIVES 

By the end of the lesson, most of the pupils should have attained the following objectives –

1. demonstrate the existence of air.

2. say the meaning of air.

3. identify the properties of air.

4. state the uses of air.

5. appreciate the importance of air in their daily life.

 

ENTRY BEHAVIOUR

The pupils can demonstrate the existence of air by breathing in (out), blowing air in the balloon, etc.

 

 

INSTRUCTIONAL MATERIALS

The teacher will teach the lesson with the aid of:

1. Electric fan

2. Hand fan

3. Straw and water

 

 

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

• Primary 2 – Scheme of Work and Plan Lesson Notes (All Subjects)

• Primary 3 – Scheme of Work and Plan Lesson Notes (All Subjects)

• First Term Workbook – Weekly Assessment for Basic Science and Technology (Primary 3)

 

 

CONTENT OF THE LESSON  

LESSON 1 – INTRODUCTION 

Air is around.

We breathe in oxygen and breathe out carbo dioxide.

Oxygen and carbon dioxide are air (gas).

All living things need air.

 

The human, animals and plants would die without air.

Note – When you ask pupils to breath in and out, please don’t ask them to close their noses.

 

MEANING OF AIR 

Air is the the mixture of gases that surround us.

The gases are invisible, odorless and tasteless.

When air is motion, it is called wind.

Wind is air in motion.

 

EXISTENCE OF AIR 

Air exists because we breathe it everyday and it is necessary for all things living on this earth.

Apart from simple machines, other machines can not work perfectly without air.

For example – the car, generator, all air machines, pumping machine, etc.

 

ACTIVITIES ON EXISTENCE OF AIR 

Materials – balloon, light ball, whistle, hand fan, rechargeable fan and musical instruments.

Teacher organizes pupils in groups or pairs depending on the size of the class to,

1. Gently breathe in and breathe out.

Breathing is the act of expelling air from the lungs.

2. Blow air in balloon, light ball, whistle or musical instruments.

 

LESSON EVALUATION 

Teacher ask pupils to,

1. say the different between oxygen and carbon dioxide.

2. demonstrate the existence of air.

3. state 5 things that produce air.

4. mention 5 living things that depends on air.

5. mention 5 machines that cannot work without air.

6. state 5 things contain air.

 

LESSON 2 – PROPERTIES OF AIR 

ACTIVITIES ON PROPERTIES OF AIR 

Based on the existing groups or pairs, teacher guides pupils to carry out the following instructions,

1. AIR HAS WEIGHT 

Materials needed – Ball and scale balance

Guided Instructions, 

1. Weigh a deflated football bladder on a scale balance, take the weigh and write it down.

2. Inflate the football with air and weigh it again, take the weigh and write it down.

3. Compare the weights.

4. Which one is heavier?

5. What makes it heavier, if inflated ball is heavier?

6. What does this suggest to you?

Expected responses – Air has weight. 

 

2. Air OCCUPIES SPACE

Materials needed – Bottles and buckets of water.

Guided Instructions, 

1. Put a small bottle upside down into a basin of water.

2. Turn the bottle up side down and put inside the water. What do you observe?

Expected responses – Water cannot go in the bottle. 

3. Gently turn the mouth of the bottle toward the surface of the water. What do you observe? Pupil’s comment – Water can enter the bottle. 

4. Explain why water cannot enter into the bottle in the first instance.

5. Is the bottle empty after? Pupil’s comment – No, it is not empty. 

Conclusion – Air occupies space.

For the water to enter the bottle, the air must go out.

But if  the air cannot come out, water cannot enter.

 

3. AIR HAS PRESSURE 

Materials needed – Balloons

Guided Instructions, 

1. Inflate a balloon.

2. Touch it gently.

3. How does it feel to touch.

4. Release the inflated balloon in front of pieces of paper.

5. What do you observe? Air blown the pieces of paper away.

Teacher’s comment – Air can push anything about because it has weight and pressure.

The weight of an object is force that push objects about. 

 

4. AIR HAS WEIGHT

Materials needed – Balloon and flat plywood

Guided Instructions, 

1. Inflated 4 balloons.

2. Put all the balloons together and place a flat plywood on them.

3. One of you should sit on it.

4. What do you observe?

5. What keeps the pupil afloat on the balloons?

Teacher’s/Pupil’s comment – Air has or support weight.

Bicycles, cars and lorries are resting on tyres containing a lot of air. 

 

PROPERTIES OF AIR 

The properties of air are as follows:

1. Air has weight.

2. Air occupies space.

3. Air exert pressure.

4. Air supports weight.

5. Air is affected by heat.

6. Air can be compressed.

7. Air is affected by altitude.

8. Air is made up of gases

 

 

LESSON 3 – USES OF AIR 

The importance (uses) of air are as follows:

 

1. Air supports lives.

2. Air supports water cycle.

3. Air supports pollination.

4. Air helps in transport.

5. Air minimizes pollution.

6. Air regulates temperature.

 

LESSON EVALUATION 

Teacher asks pupils to analyze,

1. air supports lives.

2. air supports water cycle.

3. air supports pollination.

4. air helps in transport.

5. air minimizes pollution.

6. air regulates temperature.

 

REVISION AND WEEKLY ASSESSMENT (TEST) 

 

 

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. Teacher organizes pupils in groups or pairs depending on the size of the class.

3. Teacher guides pupils to gently breathe in and breathe out.

4. Teacher asks pupils, what did you breathe in and breathe out?

Pupil’s Activities – We breathe in oxygen and breathe out carbon dioxide.

5. Teacher asks pupils, what does mean when someone doesn’t breathe anymore?

Pupil’s Activities – When someone doesn’t breathe anymore means the person is death.

6. Teacher uses the pupil’s responses to introduce the lesson and leads a discussion on the meaning of air and its existence.

 

Pay attention to the lesson introduction to understand the concept of the lesson.

7. Teacher guides the groups or pairs to demonstrate the existence of air by breathing, blowing air inside the ball, whistle or musical instruments.

Pupil’s Activities – Prove that air exists.

8. Teacher leads a discussion on the properties of air by using different activities.

Pupil’s Activities – Identify and discuss the properties of air.

9. Teacher guides pupils to identify and discuss the importance (uses) of air.

Pupil’s Activities – Analyze and appreciate the importance of air in our daily life.

10. Teacher summarizes the lessons on the board with appropriate lesson evaluation.

Pupil’s Activities – Participate actively in the summary of the lesson by responding correctly to the questions and write as instructed.

 

 

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 – Air (Flotation) – Objects that Float in the Air | Characteristics of Objects that Float in Air | The Effects of Air on the Body Primary 2 (Basic 2) Term 3 Week 6 Basic Science and Technology

 

 

LESSON EVALUATION 

Teacher asks pupils to, 

1. say the different between oxygen and carbon dioxide.

2. discuss and demonstrate the existence of air.

3. state 5 things that produce air.

4. mention 5 living things that depends on air.

5. mention 5 machines that cannot work without air.

6. state 5 things contain air.

 

7. mention 5 animals that breathe in and out air.

8. plants breathe in and out air. True/False

9. identify 5 things that used air to work well. Hint – tyre, ball, balloon, etc. 

10. state 5 uses of air.

11. Analyze how,

• air supports lives.

• air supports water cycle.

• air supports pollination.

• air helps in transport.

• air minimizes pollution.

• air regulates temperature.