Class: Primary 4
Term: 2nd Term
Week: 10
Age: 9 years
Duration: 40 minutes
Subject: Basic Science Technology
Curriculum Theme: Basic Science
Topic: Water
Content: Pure And Impure Water

Specific Objectives:

Cognitive Domain: Pupils should be able to list and describe the qualities of pure and impure water.
Affective Domain: Pupils should develop an understanding and appreciation of the importance of water purity.
Psychomotor Domain: Pupils should be able to perform simple tests to distinguish between pure and impure water.
Social Domain: Pupils should engage in discussions about water purity and its impact on health and the environment.

Reference Materials:

9 – Years Basic Education Curriculum
Abuja Educational Resource Centre Scheme of work
NAPPS National Unified Scheme of Work
Online Information
Textbooks

Instructional Materials:

Samples of pure and impure water
Charts depicting water purification processes
Projector or slides showing effects of impure water

Rationale for the Lesson:

Understanding the concept of pure and impure water is crucial as it relates directly to health, environmental awareness, and science literacy. This knowledge is foundational for promoting healthy living and environmental stewardship among pupils.

Prerequisite/Previous Knowledge:

Basic understanding of water and its common uses.

INSTRUCTIONAL PROCEDURES:

Content Development: Pure And Impure Water

Content	Time	Teaching Method	Teaching Strategy	Teacher’s Activity	Pupil’s Activity	Learning Point
Introduction to Water	5 min	Discussion	Inquiry-based	Introduce topic, ask pupils about their understanding of water	Pupils share their prior knowledge about water	Engaging pupils’ interest and assessing prior knowledge
Explaining Pure Water	10 min	Lecture	Expository	Explain the qualities of pure water	Listening and asking questions	Understanding the concept of pure water
Explaining Impure Water	10 min	Lecture & Demonstration	Expository & Interactive	Show examples of impure water, discuss sources of contamination	Observing and identifying differences	Recognizing impure water
Practical Test	5 min	Practical Activity	Hands-on	Demonstrate a simple test to identify pure water	Pupils perform the test	Applying knowledge in a practical context
Discussion on Water Purity	5 min	Group Discussion	Collaborative Learning	Facilitate a discussion on the importance of water purity	Participate in group discussion	Understanding the impact of water purity on health and environment
Note Taking	5 min	Writing	Reflective	Guide pupils to take notes	Pupils take notes	Summarizing and internalizing the lesson
Evaluation	3 min	Question & Answer	Assessment	Ask questions related to the topic	Pupils respond to questions	Assessing understanding of the topic
Conclusion	2 min	Summarizing	Reflective	Sum up the lesson, highlighting key points	Listening and internalizing the summary	Reinforcing the lesson’s main points

Classroom Note:

Qualities Of Pure Water

Clear Appearance: Pure water is completely clear and transparent, without any color.
No Smell: It has no distinct smell, indicating the absence of impurities that could cause odors.
No Taste: Pure water should have a neutral taste, without any bitterness, saltiness, or sweetness.
Free of Sediments: There should be no visible particles or sediments floating in or settling at the bottom of pure water.
Safe for Drinking: Pure water is safe for consumption, meaning it doesn’t contain harmful bacteria, viruses, or chemicals.

Qualities Of Impure Water

Cloudy Appearance: Impure water often has a cloudy or look due to suspended particles like dirt or sand.
Unpleasant Odor: It may have a foul or unusual smell, which can be due to the presence of chemicals.
Strange Taste: Impure water can have a metallic, sour, or otherwise unpleasant taste, indicating the presence of various contaminants.
Presence of Microorganisms: Impure water may contain bacteria, viruses, and parasites, which are not visible to the naked eye but can be harmful if consumed.
Contains Chemicals and Metals: It might have harmful chemicals, heavy metals like lead or mercury, or excessive minerals, contributing to its impurity.

Importance Of Clean Water

Health: Clean water is essential for good health.
Hydration: Clean water is crucial for hydration, which is important for all bodily functions.
Cooking: Clean water is necessary for cooking, ensuring that the food prepared is safe and healthy to eat.
Personal Hygiene: It is vital for personal hygiene practices like bathing and brushing teeth.

Agriculture: Clean water is important for agriculture to grow healthy crops, which are vital for nutrition and food security.

Evaluation:

What are three qualities of pure water?
Name two differences between pure and impure water.
Why is it important to have access to pure water?

Note to Teachers:

Customize the lesson content, teaching methods, and pupil activities to suit your teaching style, curriculum, and available resources.

Evaluation Questions:

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Lesson Note On Water – Pure And Impure Water (Basic 4)