Chapter 3: Diversity of Materials

第三章：材料的多样性

P3 Science · 小三科学 · 7 Learning Pages

🎤 Each page has click-to-speak vocabulary and quizzes · 每页都有点击朗读的词汇和测验

📋 What I Am Learning · 学习目标

What are the different types of materials around us?
我们周围有哪些不同类型的材料？
What are the physical properties of materials?
材料有哪些物理特性？
How are materials with different properties used?
具有不同特性的材料是如何被使用的？

🟢 Part A · Types of Materials 材料的种类

Materials: Wood

材料：木头

Introduction to 7 types of materials. Wood comes from trees — furniture, instruments, sports gear & paper. Includes: How paper is made.

📖 Pages 45–46

Metal & Ceramic

金属和陶瓷

Gold, iron, copper & aluminium from underground. Ceramic from clay baked in a kiln. Includes: How ceramic is made.

📖 Pages 47–48

橡胶和玻璃

Rubber from tree sap or oil. Glass from heated sand. Charles Goodyear's story. Includes: How glass is made.

📖 Pages 49–50

Plastic & Fabric

塑料和布料

Plastic from oil — long-lasting & recycling. Fabric from wool (sheep), silk (caterpillar) & cotton (plant).

📖 Pages 51–52

🟠 Part B · Physical Properties 物理特性

Properties (Part 1)

物理特性（上）

Strength (strong vs fragile), Flexibility (flexible vs rigid), Float or Sink. Why do metal ships float?

📖 Pages 53–56

Properties (Part 2)

物理特性（下）

Waterproof (rubber, plastic, glass, metal vs fabric). Transparency (transparent, translucent, opaque).

📖 Pages 57–58

🔴 Part C · Using Materials 材料的应用

Choosing the Right Material

选择合适的材料

Matching materials to purposes. Real-world examples (curtains, trolleys, fish tank). Same object from different materials. Many materials in a car. The design process.

📖 Pages 59–66