Look around you — tables, books, pots, clothes, toys, and windows! Every object around us is called a thing or an object. Objects are made of different materials. Learning about materials helps us understand why things are made the way they are.
What Are Materials?
- A material is what an object is made of. Common materials include:
- Wood — doors, chairs, tables, pencils
- Metal — spoons, scissors, tins, bridges
- Plastic — bottles, combs, buckets, toys
- Glass — windows, mirrors, spectacles
- Cloth/Fabric — clothes, bags, curtains
- Paper — books, newspapers, bags
- Stone/Brick — walls, floors, buildings
- Rubber — tyres, rubber bands, shoe soles
Properties of Materials
Each material has special properties (features) that make it useful:
| Property | Meaning | Example |
|---|---|---|
| Hard | Does not bend or break easily | Stone |
| Soft | Can be squished or bent | Cotton |
| Shiny | Reflects light | Metal spoon |
| Transparent | See-through | Glass window |
| Waterproof | Does not let water through | Plastic bag |
| Rough | Has an uneven surface | Sandpaper |
| Smooth | Has a flat, even surface | Mirror |
Why Is Each Material Used?
We choose a material based on what it needs to do. A window needs to be transparent (so we can see through it) so it is made of glass. A bucket needs to be waterproof so it is made of plastic or metal.
Natural and Man-Made Materials
Some materials come directly from nature — natural materials: wood (from trees), cotton (from plant), wool (from sheep), stone (from earth).
Other materials are made by humans in factories — man-made materials: plastic, glass, steel.
A cooking pot is made of metal because metal can handle high heat without melting or burning. Wood would catch fire.
A window is made of glass because glass is transparent — we can see through it and sunlight can enter the room.
Raincoats are made of plastic or rubber because these materials are waterproof. Cloth raincoats would soak up water.
Cotton clothes are worn in summer because cotton is soft, light, and lets air pass through (breathable), keeping us cool.
A pencil is made of wood and graphite. Wood is easy to shape and safe to hold, while graphite leaves a mark on paper.
Common mistakes
Students sometimes say glass is "see-through" and metal is "see-through" too. Remember — metal is shiny but NOT transparent. Only materials like glass, clear plastic, and water are transparent.
Summary
Everything around us is made of materials such as wood, metal, glass, plastic, cloth, and stone. Each material has special properties. We choose materials based on their properties and what the object needs to do. Materials can be natural (from nature) or man-made (made in factories).