# Introduction to Materials: Natural vs. Synthetic Fibres
> Learn about common materials like cotton, wool, leather, metal, plastic, and cork in this Grade 7 Science guide to everyday objects and textiles.

Tags: science-education, materials, textiles, natural-fibres, polymers, middle-school-science, sustainability
## Grade 7 Science: Clothing Materials & Everyday Objects
- Overview of natural fabrics, shiny metals, and hard polymers.

## Cotton: A Natural Plant Fibre
- Derived from the *Gossypium* plant.
- Characteristics: Soft, breathable, and absorbent.
- Common uses: T-shirts, jeans, towels, and bed sheets.

## Animal-Based Materials: Wool & Leather
- **Wool**: Harvested from sheep fleece; used for warmth and elasticity in sweaters and blankets.
- **Leather**: Made from animal skin (cow, pig, sheep); durable and water-resistant for shoes and jackets.

## Manufactured Materials: Metal & Plastic
- **Metal**: Natural resource (iron, aluminum, copper); strong and conductive; used in cutlery and electronics.
- **Plastic**: Man-made from petroleum; lightweight and waterproof; used in packaging and toys.

## Material Science: Cork
- Harvested from the bark of cork oak trees.
- Features: Eco-friendly, biodegradable, and insulating.
- Cork trees can live up to 200 years.

## Summary of Learning
- **Plant-based**: Cotton.
- **Animal-based**: Wool, Leather.
- **Mined/Manufactured**: Metal, Plastic.
- **Sustainable Bark**: Cork.
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