Classes & Properties of Materials

1. Properties of materials

1.1. Chemical properties

1.1.1. A new substance is created

1.1.2. Examples

1.1.2.1. Flammability

1.1.2.2. Heat of Combustion

1.1.2.3. Toxicity

1.1.2.4. etc...

1.2. Physical properties

1.2.1. No new substance is created

1.2.2. Examples

1.2.2.1. Strength

1.2.2.2. Hardness

1.2.2.3. Flexibility

1.2.2.4. etc...

2. 5 Main Classes of Materials

2.1. Metals

2.1.1. Source: Ground

2.1.2. Shiny

2.1.3. Good conductors of heat and electricity

2.1.4. Malleable

2.1.5. Some corrode easily while others do not

2.2. Ceramics

2.2.1. Source: Clay

2.2.2. Non-metallic solids

2.2.3. Hard, but brittle

2.2.4. High melting point

2.2.5. Poor conductors of heat and electricity

2.2.6. Do not corrode

2.3. Plastics

2.3.1. Source: Petroleum

2.3.2. Strong, but light

2.3.3. Do not corrode

2.3.4. Poor conductors of heat and electricity

2.3.5. Can be moulded

2.4. Fibres

2.4.1. Natural source: Cotton

2.4.2. Man-made source: Nylon

2.4.3. Can be spun into threads

2.4.4. Can be woven into fabrics

2.4.5. Can absorb dyes

2.5. Glass

2.5.1. Source: Sand

2.5.2. Transparent

2.5.3. Brittle

2.5.4. Poor conductors of heat and electricity

2.5.5. Do not corrode

2.5.6. Can be moulded