Water

TOPIC: Water
SUBTOPIC: Differentiating Water from Other Liquids – Evaporation – Condensation – Freezing
CLASS: PRIMARY 4
DATE: ____________________
PERIOD: ____________________
DURATION: 40 minutes

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

1. Differentiate water from other liquids.
2. Explain evaporation, condensation, and freezing.
3. Give real-life examples of each process.

KEY VOCABULARY WORDS: evaporation, condensation, freezing, boiling, melting.

INSTRUCTIONAL MATERIALS:

• Cup of water and oil for comparison
• Kettle and mirror for condensation demo
• Ice cubes for freezing demo
• Diagram of water cycle

CONTENT OF THE LESSON:

Water vs Other Liquids:

• Water is colourless, odourless, tasteless.
• Some liquids like oil have colour, smell, and do not mix with water.

Evaporation:

• Process where liquid water changes into vapour (gas) when heated or exposed to air.
• Example: Clothes drying in the sun.

Condensation:

• Process where water vapour changes into liquid water when cooled.
• Example: Water drops on a cold glass.

Freezing:

• Process where liquid water turns into ice when cooled below 0°C.
• Example: Making ice blocks in freezer.

Diagram – Simple Water Cycle:
(Teacher draws: Sun heats water → Evaporation → Condensation → Rain.)

INTRODUCTORY ACTIVITY:
Teacher shows pupils ice melting and asks what will happen if it is put back in the freezer.

CLASS EXERCISE 1:
State two ways water is different from oil.

CLASS EXERCISE 2:
Give one example each of evaporation, condensation, and freezing.

ASSIGNMENT (MCQs):

1. Water has no (a) colour (b) use (c) importance
2. Clothes drying in the sun is an example of (a) freezing (b) evaporation (c) condensation
3. Water turning to ice is called (a) melting (b) freezing (c) boiling
4. Steam turning into water drops is called (a) condensation (b) evaporation (c) freezing
5. The main source of heat for evaporation is the (a) moon (b) sun (c) cloud