Changes in nature Types of changes Temporary (reversible) Permanent (irreversible)

Last Updated on August 4, 2020 by Edu Delight Tutors

Subject :

Basic Science and Technology

Topic :

Changes in nature Types of changes
Temporary (reversible)
Permanent (irreversible)

Class :

Primary 4

Term :

First Term

Week :

Week 1

Instructional Materials :

• matches and pieces of paper
• Stove/cooking Gas
• Block
• Bucket
• Water
• Candle
• Green and yellow leaves
• knife
• Whiteboard/Chalkboard
• Explanatory posters/pictures
• Explanatory videos


Reference Materials

  • Scheme of Work
  • Online Information
  • Textbooks
  • Workbooks
  • 9 Year Basic Education Curriculum

Previous Knowledge :

The pupils have previous knowledge of living things and non living things



Behavioural Objectives :  At the end of the lesson, the pupils should be able to

  1. Explain the meaning of change.
  2. Say the changes they observe in their surrounding
  3. Tell the differences between temporary and permanent changes
  4. Giveaat least two examples each of temporary and permanent changes.


Content :



What is change?

Change is transformation.

Change is the movement from a former state of being to a latter state of being.

It is the end result of a process.

Change is when something loses one’s or its original nature or it is an event that occurs when something passes from one state or phase to another.

When things are no longer in their normal form, it means a change has occurred. Living things and non-living things do experience changes.


Living things are things that have life like animals (cat, dog), Human beings (Male and female) while non-living things are things without life like stone, table, chairs chalkboard.


Examples of changes

  1. Iron becoming rusty

  2. Green leaves turning yellow

  3. Melting of candle wax

  4. Ice block changing to water

  5. Girl changes to woman


  1. Boy changes to man

  2. Day changes to night

  3. Dough changes to loaves of bread

  4. Catapillar changes to butterfly

  5. Beans changes to moinmoin or àkàrà

Changes in Natures Occurs in two forms.

These are:

Temporary changes and Permanent changes

Types of changes

Temporary changes (Reversible Changes) are changes that happened for a short time and they are reversible.The action can be done and undone or redone

Temporary changes occurs due to the change in position or condition in the Environment
Temporary changes occurs in living and non- living things.


Examples of Temporary changes


  1. Water changes to ice block during low temperature.

  2. Ice block changes to water when the temperature is raised.

  3. Water becomes hot when heated.

  4. Water becomes cold removed from fire after some time.

  5. Chameleon change its colours to its environment


Permanent changes (irreversible Changes)

Once permanent change occurred the body or thing affected cannot be reverse to the way, it was before. That is, it is irreversible.
Permanent change also occurs in both living and non-living things.

Examples of Permanent changes

  1. A child changes to an adult.

  2. cassava turn to Garri

  3. A dead person cannot live again.

  4. Trees cut into planks to make furniture.

  5. Wood burnt into ashes.

  6. Cement mixed with sand and water to make block.

  7. Burnt paper will turn to ashes and the ashes cannot turn back to paper

  8. Anything that is burnt cannot be reversed back to its original condition.



The topic is presented step by step


Step 1:

The class teacher revises the previous topics


Step 2.

He introduces the new topic


Step 3:

The class teacher allows the pupils to give their own examples and he corrects them when the needs arise


Evaluation :

  1. What is change.

  2. what is physical change

  3. What is chemical change

  4. Give three Examples of temporary change

  5. Give three examples of permanent change

  6. Mention two things that have changed in your school compound since the last vacation

  7. Mention two things that have change at home since last December

Conclusion :


The class teacher wraps up or conclude the lesson by giving out short note to summarize the topic that he or she has just taught.

The class teacher also goes round to make sure that the notes are well copied or well written by the pupils.

He or she does the necessary corrections when and where  the needs arise.


Assignment :

Prepare for the next lesson by reading about changes in plants