Air: Meaning, Properties, Applications of Air, Meaning and the Uses (Importance) of Air Pressure Primary 5 (Basic 5) Second Term Week 2 Basic Science and Technology

BASIC SCIENCE AND TECHNOLOGY

SECOND TERM

WEEK 2 

PRIMARY 6 (BASIC 6) 

THEME – LIVING AND NON LIVING THINGS 

PREVIOUS LESSON – Respiratory System: Meaning, Functions, Organs of the Respiratory System and Their Functions Primary 6 (Basic 6) First Term Week 11 Basic Science and Technology

TOPIC – AIR 

LEARNING AREA

1. Introduction

2. Meaning, Properties and Applications of of Air

3. Meaning and Uses of Air Pressure

4. Practical Activities on the Properties

5. Weekly Assessment: Test Questions and Answers/Assignment

6. Summary

LEARNING OBJECTIVES 

By the end of the lesson, pupils should be able to:

1. Define air.

2. State the properties of air.

3. Explain the applications (uses) of air.

4. Define air pressure.

5. State the uses (importance) of air pressure.

6. Carry out simple activities to show that air occupies space and exerts pressure.

ENTRY BEHAVIOUR

Pupils have previously learned that living things need air to survive and that air is found everywhere around us, even though it cannot be seen.

This lesson builds on that knowledge by helping pupils understand the meaning of air, its properties, its applications (uses), and the meaning and importance of air pressure in everyday life.

INSTRUCTIONAL MATERIALS

The teacher will teach the lesson with the aid of:

1. Balloon

2. Empty bottle

3. Plastic syringe (without needle)

4. Fan

5. Tyre or football

6. Chart showing the atmosphere

7. Drinking straw

8. Cup of 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

CONTENT OF THE LESSON

INTRODUCTION

Although we cannot see air, it is all around us and is very important for life. People, animals, and plants depend on air for survival. Air also helps in burning, drying clothes, flying kites, and inflating tyres and balloons.

When air presses against objects, it produces air pressure, which has many useful applications in our daily lives.

In this lesson, pupils will learn the meaning of air, its properties, applications, the meaning of air pressure, and the importance of air pressure in everyday life.

LESSON 1 – MEANING OF AIR

Air is a mixture of gases that surrounds the Earth. It is colourless, odourless, tasteless, and invisible. Air is essential for the survival of humans, animals, and plants.

Air is made up mainly of:

1. Nitrogen

2. Oxygen

3. Carbon dioxide

4. Water vapour

5. Other gases in small amounts

PROPERTIES OF AIR

Air has the following properties:

1. Air occupies space.

2. Air has weight (mass).

3. Air exerts pressure.

4. Air can move from one place to another (wind).

5. Air is colourless.

6. Air is odourless.

7. Air is tasteless.

8. Air can be compressed.

9. Air expands when heated and contracts when cooled.

10. Air supports burning because it contains oxygen.

APPLICATIONS (USES) OF AIR

Air is useful in many ways. Some of its applications include:

1. It helps humans and animals to breathe.

2. Plants use air to make their food.

3. It supports the burning of fire.

4. It is used to inflate tyres, balls, balloons, and air mattresses.

5. Moving air (wind) helps to dry clothes and farm produce.

6. Wind moves sailing boats and ships.

7. Wind turns windmills to generate electricity.

8. Air is used in aeroplanes for flight.

9. Air helps birds and insects to fly.

10. Air is used in musical instruments such as flutes and trumpets to produce sound.

LESSON 2 – MEANING OF AIR PRESSURE

Air pressure is the force exerted by air on the surface of objects. Since air has weight and occupies space, it presses on everything around us.

USES (IMPORTANCE) OF AIR PRESSURE

1. Air pressure helps us drink liquids through a straw.

2. It is used to inflate tyres, footballs, balloons, and air mattresses.

3. It helps syringes draw in and push out liquids.

4. It enables suction cups to stick to smooth surfaces.

5. It helps pumps draw water from wells and tanks.

6. It helps aeroplanes fly by creating lift.

7. It helps in weather changes such as the movement of wind and rain.

8. It helps us breathe by allowing air to move into and out of the lungs.

9. It is used in spray bottles, perfume sprayers, and aerosol cans.

10. It is important in the operation of vacuum cleaners.

EVERYDAY ACTIVITIES THAT SHOW AIR PRESSURE

1. Drinking water with a straw.

2. Inflating a bicycle tyre with a pump.

3. Using a syringe.

4. Blowing up a balloon.

5. Using a suction cup to hang objects on a wall.

SAFETY TIPS

1. Do not overinflate balloons or tyres.

2. Handle syringes carefully and only under adult supervision.

3. Keep air pumps and compressed-air equipment away from small children.

4. Avoid playing with damaged aerosol cans.

LESSON 3 – PRACTICAL ACTIVITIES ON THE PROPERTIES OF AIR

Note: The children should be divided into groups, and activities should be assigned to each group.

ACTIVITY 1: Air Occupies Space

Materials: Empty bottle, bowl of water, tissue paper.

Procedure:

• Put a dry tissue paper inside an empty bottle.

• Turn the bottle upside down.

• Push the bottle straight into a bowl of water without tilting it.

• Remove the bottle and check the tissue paper.

Observation: The tissue paper remains dry.

Conclusion: Air inside the bottle occupies space and prevents water from entering.

ACTIVITY 2: Air Has Weight (Mass)

Materials: Two balloons, ruler (or stick), string.

Procedure:

• Inflate one balloon and leave the other uninflated.

• Tie one balloon to each end of a ruler using strings.

• Balance the ruler on a support.

Observation: The side with the inflated balloon drops lower.

Conclusion: Air has weight (mass).

ACTIVITY 3: Air Exerts Pressure

Materials: Balloon.

Procedure:

• Inflate a balloon.

• Press the balloon gently with your hands.

• Release it.

Observation: The balloon pushes back against your hands.

Conclusion: Air inside the balloon exerts pressure on the balloon’s walls.

Activity 4: Air Can Move from One Place to Another (Wind)

Materials: Hand fan or piece of cardboard, paper strips.

Procedure:

• Hang or hold paper strips loosely.

• Wave a hand fan or cardboard toward the paper strips.

Observation: The paper strips move.

Conclusion: Moving air is called wind, and air can move from one place to another.

Safety Precautions

1. Handle balloons carefully to avoid bursting them near the face.

2. Do not inhale balloon pieces if a balloon bursts.

3. Carry out the activities under the teacher’s supervision.

4. Keep the work area clean and dry.

Expected Learning Outcome

After these practical activities, pupils should be able to demonstrate that:

1. Air occupies space.

2. Air has weight (mass).

3. Air exerts pressure.

4. Air can move from one place to another as wind.

WEEKLY ASSESSMENT: TEST QUESTIONS AND ANSWERS/ASSIGNMENT

A. Objective Questions (Choose the Correct Answer)

1. Air is a mixture of ______.

A. liquids

B. solids

C. gases

D. metals

2. Which of the following is a property of air?

A. Air occupies space.

B. Air has no space.

C. Air has no weight.

D. Air is visible.

3. Air pressure is the ______ exerted by air on objects.

A. colour

B. force

C. smell

D. taste

4. Which of the following uses air pressure?

A. Drinking through a straw

B. Reading a book

C. Writing with a pencil

D. Sweeping the floor

5. Moving air is called ______.

A. smoke

B. steam

C. wind

D. rain

B. Fill in the Blanks

6. Air is ______, odourless, tasteless, and invisible.

7. Air has ______ (mass).

8. Air helps humans and animals to ______.

9. Air pressure helps us drink through a ______.

10. Air can move from one place to another as ______.

C. True or False

11. Air occupies space. ______

12. Air has no weight. ______

13. Wind is moving air. ______

14. Air pressure has no use in everyday life. ______

15. Air supports the burning of fire. ______

D. Short Answer Questions

16. What is air?

17. Mention four properties of air.

18. State four applications (uses) of air.

19. What is air pressure?

20. Mention four uses (importance) of air pressure in everyday life.

ANSWER GUIDE

1. C

2. A

3. B

4. A

5. C

6. Colourless

7. Weight

8. Breathe

9. Straw

10. Wind

11. True

12. False

13. True

14. False

15. True

16. Air is a mixture of gases that surrounds the Earth.

17. Any four: Air occupies space, has weight (mass), exerts pressure, can move as wind, can be compressed, expands when heated, contracts when cooled, supports burning.

18. Any four: Breathing, supporting burning, drying clothes, inflating tyres and balloons, flying aeroplanes, turning windmills, moving sailing boats, producing sound in musical instruments.

19. Air pressure is the force exerted by air on the surface of objects.

20. Any four: Drinking through a straw, inflating tyres and footballs, using syringes, operating pumps, using spray bottles, supporting aeroplane flight, operating vacuum cleaners, helping us breathe.

SUMMARY

In this lesson, pupils learned that air is a mixture of gases surrounding the Earth. It is colourless, odourless, tasteless, and invisible, and it is essential for the survival of humans, animals, and plants.

They also learned the properties of air, including that air occupies space, has weight (mass), exerts pressure, can move from one place to another as wind, can be compressed, expands when heated, contracts when cooled, and supports burning.

Furthermore, pupils learned the applications (uses) of air, such as breathing, supporting the burning of fire, drying clothes, inflating tyres and balloons, generating electricity through windmills, helping birds and aeroplanes fly, moving sailing boats, and producing sound in some musical instruments.

Pupils also learned that air pressure is the force exerted by air on the surface of objects. They discussed the importance of air pressure in everyday life, including drinking through a straw, inflating tyres and footballs, using syringes and pumps, operating spray bottles and vacuum cleaners, supporting aeroplane flight, and helping us breathe.

Finally, through practical activities, pupils observed that air occupies space, has weight, exerts pressure, and can move from one place to another as wind. These activities helped them understand the properties of air through simple experiments.

PRESENTATION

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

1. The teacher displays a balloon, empty bottle, hand fan, and chart showing air and the atmosphere.

Pupils’ Activities: Pupils observe the materials and identify the objects.

2. The teacher explains the meaning of air.

Pupils’ Activities: Pupils define air in their own words.

3. The teacher demonstrates that air occupies space by placing an empty bottle upside down in water.

Pupils’ Activities: Pupils observe the demonstration and explain why water does not enter the bottle.

4. The teacher explains the properties of air and demonstrates that air has weight and exerts pressure using simple classroom activities.

Pupils’ Activities: Pupils participate in the activities and state the properties of air.

5. The teacher discusses the applications (uses) of air in everyday life.

Pupils’ Activities: Pupils mention different ways air is used at home, in school, and in the environment.

6. The teacher explains the meaning of air pressure and demonstrates it using a straw, syringe, or balloon.

Pupils’ Activities: Pupils observe the demonstration and explain how air pressure works.

7. The teacher discusses the uses (importance) of air pressure in everyday life.

Pupils’ Activities: Pupils identify activities that depend on air pressure, such as drinking with a straw, inflating tyres, and using pumps.

8. The teacher asks oral questions to assess pupils’ understanding.

Pupils’ Activities: Pupils answer the questions and participate actively.

9. The teacher summarizes the lesson.

Pupils’ Activities: Pupils participate in the summary and write important points in their notebooks.

10. The teacher gives classwork and marks pupils’ responses.

Pupils’ Activities: Pupils complete the exercise and make corrections where necessary.

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

Changes in Our Climate: Meaning and Examples of Weather symbols, Meaning and Examples of Weather Records, Global Warming and Effects of Climate Change Primary 6 (Basic 6) Second Term Week 3 Basic Science and Technology

LESSON EVALUATION 

Teacher asks pupils,

1. What is air?

2. State five properties of air.

3. Mention five applications (uses) of air.

4. What is air pressure?

5. State five uses (importance) of air pressure in everyday life.