Class 3 (CBSE) • Environmental StudiesChapter 10: This World of Things⭐ Topic 2
Properties of Materials
Materials have different properties, like being hard or soft, rough or smooth, and able to float or sink in water.
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Hardness tells us how firm a material is - a stone is hard, while cotton is soft. Texture tells us if a surface is smooth (like glass) or rough (like sandpaper).
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- Hardness tells us how firm a material is.
- Texture can be smooth or rough.
- Wood and plastic float on water.
- Stone and metal sink in water.
- Transparent materials let light through, like glass.
- Translucent materials let some light through.
- Opaque materials block light completely, like wood.
- Properties help us choose materials for specific purposes.
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properties of materials