Lesson Notes By Weeks and Term v4 - Basic 4

Lesson Video

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Performance objectives

• Identify and classify different types of matter.
• Describe solids, liquids, and gases.
• Explain why matter is important in our daily lives.
• Understand how matter can change from one state to another.

Lesson summary

This lesson introduces learners to the fascinating world of matter and its diversity. Everything around us, from the chair we sit on, the water we drink, to the air we breathe, is matter. In our communities in Ghana, we use different materials for different purposes because they have different characteristics. For example, we build canoes from wood because it floats, and we build houses with blocks because they are hard and strong. By learning to observe and classify materials based on their properties, learners will develop key scientific skills and better understand the world around them. This knowledge is the foundation for understanding chemistry and material science in later years.

Lesson notes

Concept 1: What is Matter? Explanation: In science, we have a special name for all the "stuff" that makes up everything in the universe. We call it matter. Matter is anything that has mass (or weight on Earth) and volume (it takes up space). Ghanaian Examples: A stone you pick up from the ground has weight and takes up space. It is matter. The water in a bucket has weight and takes up space. It is matter. The fufu on your plate has weight and takes up space. It is matter. Even the air we cannot see is matter! It takes up space inside a balloon and has weight.

Concept 2: What are Physical Properties? Explanation: Every material has special characteristics that help us describe it. These are called physical properties. We can observe these properties using our five senses (sight, touch, smell, taste, hearing) without changing the material into something new. Think of them as clues that help us identify and sort different types of matter. Analogy: Just like you can describe your friend as "tall," with "black hair," and a "loud laugh," we can describe a material like wood as "brown," "hard," and "rough."

Detailed Explanation of Key Physical Properties:

a) Colour: What it is: The appearance of an object as a result of the way it reflects light. It's what we see with our eyes. Examples: A ripe mango is yellow or orange. The leaves on a cassava plant are green. Charcoal is black. The sky on a clear day is blue.