Lesson Notes By Weeks and Term v4 - JHS 1

Lesson Video

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Performance objectives

• Identify solids in the environment that support life.
• Explain why we must preserve useful solid materials.
• Model objects from solid materials.
• Discuss how solids contribute to our daily lives.

Lesson summary

In our daily life in Ghana, we depend on solid materials for shelter, farming, cooking, transport, health, and even the survival of plants and animals. Examples include soil for growing crops, rocks and sand for building, wood for furniture and roofing, and metals for tools and machines. Understanding the importance of specific solids to life helps us to use materials wisely, reduce waste, and preserve useful solid resources in the environment.

Lesson notes

2.1 What is a Solid? A solid is a state of matter that: has a fixed shape has a fixed volume is usually hard or firm does not flow like liquids

Examples around us: stone, wood, iron nail, plastic bottle, chalk, soil (as a solid material), glass cup.

> Note: Some solids like powdered substances (flour, cement, sand) can pour, but each grain is still a solid.

2.2 “Specific solids” and why they matter to life “Specific solids” means particular solid materials that are important for living things. We look at how they support: human survival plant growth animal habitats health and safety economic activities

Evaluation guide

• Identify solids in the environment that support the survival of humans
• and other life forms.
• Use a search on the internet to obtain information to explain the need
• to preserve useful solid materials in the environment for life.