4. Solid materials - Raw and manufactured materials

Raw material

A basic substance found in nature that is used to make things.

Processed material

Material made by people from natural materials for a specific purpose.

Process

To change raw material so it becomes processed material.

Characteristics

How a material is, like being hard, soft, strong, or waterproof.

Product

The thing that is made from raw or processed material.

Matter

Everything around us that is made of small particles.

Solid

Matter that can be hard or soft and keeps its shape, like stone.

Liquid

Matter that fills the container it is in and takes its shape, like water.

Gas

Matter that is everywhere around us, like air.

States of matter

The different forms matter can be in, like solid, liquid, and gas.

Changes of state

When matter changes from one state to another.