Changes in Nature

TOPIC: Changes in Nature
SUBTOPIC: Meaning, Examples, Classification, Temporary vs Permanent Changes
CLASS: PRIMARY 4
DATE: ____________________
PERIOD: ____________________
DURATION: 40 minutes

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

1. Explain the concept of “change”.
2. Give examples of change in nature.
3. Differentiate between temporary and permanent changes.

KEY VOCABULARY WORDS: change, temporary, permanent, rust, melting, burning.

INSTRUCTIONAL MATERIALS:

• Pictures of ice melting, paper burning, rusted iron, and plant growth
• Real objects (ice cubes, iron nail, paper)
• Chart showing classification of changes

CONTENT OF THE LESSON:

Meaning of Change:
Change is when something becomes different from how it was before. In nature, changes happen all the time.

Examples of Change in Nature:

• Ice melting into water
• A seed growing into a plant
• An iron nail getting rusty
• Paper burning into ash
• Leaves changing colour in autumn

Classification of Changes:

1. Temporary Change: Can be reversed (go back to the original state).
   • Example: Melting ice can freeze back into ice.
   • Stretching a rubber band can return to its shape.
2. Permanent Change: Cannot be reversed.
   • Example: Burning paper turns into ash.
   • Rusting of iron.

Table: Differences between Temporary and Permanent Changes

INTRODUCTORY ACTIVITY:
Teacher shows pupils an ice cube, lets it melt, and asks:

• What happened to the ice?
• Can we make it solid again?

CLASS EXERCISE 1:
State two examples of temporary changes.

CLASS EXERCISE 2:
State two examples of permanent changes.

ASSIGNMENT (MCQs):

1. A change that can be reversed is called (a) permanent (b) temporary (c) natural
2. Burning paper is an example of (a) temporary change (b) permanent change (c) reversible change
3. Ice melting into water is (a) permanent change (b) temporary change (c) no change
4. Rusting of iron is a (a) permanent change (b) temporary change (c) reversible change
5. Stretching a rubber band is (a) permanent change (b) temporary change (c) irreversible change