Basic Science and Technology
Changes in nature Types of changes
Instructional Materials :
• matches and pieces of paper
• Stove/cooking Gas
• Green and yellow leaves
• Explanatory posters/pictures
• Explanatory videos
- Scheme of Work
- Online Information
- 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
- Explain the meaning of change.
- Say the changes they observe in their surrounding
- Tell the differences between temporary and permanent changes
- Giveaat least two examples each of temporary and permanent changes.
CHANGES IN NATURE
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
- Iron becoming rusty
Green leaves turning yellow
Melting of candle wax
Ice block changing to water
Girl changes to woman
- Boy changes to man
Day changes to night
Dough changes to loaves of bread
Catapillar changes to butterfly
Beans changes to moinmoin or àkàrà
Changes in Natures Occurs in two forms.
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
- Water changes to ice block during low temperature.
Ice block changes to water when the temperature is raised.
Water becomes hot when heated.
Water becomes cold removed from fire after some time.
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
- A child changes to an adult.
cassava turn to Garri
A dead person cannot live again.
Trees cut into planks to make furniture.
Wood burnt into ashes.
Cement mixed with sand and water to make block.
Burnt paper will turn to ashes and the ashes cannot turn back to paper
Anything that is burnt cannot be reversed back to its original condition.
The topic is presented step by step
The class teacher revises the previous topics
He introduces the new topic
The class teacher allows the pupils to give their own examples and he corrects them when the needs arise
- What is change.
what is physical change
What is chemical change
Give three Examples of temporary change
Give three examples of permanent change
Mention two things that have changed in your school compound since the last vacation
Mention two things that have change at home since last December
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.
Prepare for the next lesson by reading about changes in plants
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