Chapter-Chapter 6. Materials Around Us Science Curiosity class 6 in english Medium CBSE Notes

Chapter 6. Materials Around Us

Everything around us is made of one or more materials. The objects we use every day, such as books, tables, bottles, utensils, clothes, toys, and vehicles, are made from different materials according to their properties. Understanding the characteristics of materials helps us choose the right material for a particular purpose. This chapter introduces the concept of materials, their classification, physical properties, and the basic idea of matter.

CBSE Notes - Key Points

The following notes provide important definitions, scientific terms, key concepts, and revision points from the chapter. These notes are useful for quick revision before school examinations and CBSE assessments.

Important Keywords

• Material
• Matter
• Classification
• Lustre
• Lustrous Material
• Non-Lustrous Material
• Hard Material
• Soft Material
• Transparent Material
• Translucent Material
• Opaque Material
• Soluble Substance
• Insoluble Substance
• Mass
• Volume
• Kilogram (kg)
• Gram (g)
• Litre (L)
• Millilitre (mL)
• Physical Properties

Important Definitions

Material: A material is any substance that is used to make an object.

Matter: Anything that has mass and occupies space is called matter.

Classification: The process of grouping materials according to their similar properties.

Lustre: The shiny appearance of a material is called lustre.

Hard Material: A material that cannot be scratched or compressed easily.

Soft Material: A material that can be scratched or compressed easily.

Transparent Material: A material that allows almost all light to pass through it.

Translucent Material: A material that allows only some light to pass through it.

Opaque Material: A material that does not allow light to pass through it.

Soluble Substance: A substance that dissolves completely in water.

Insoluble Substance: A substance that does not dissolve in water.

Mass: The quantity of matter present in an object.

Volume: The space occupied by an object.

Scientific Terms

Important Facts

• Everything around us is made of matter.
• An object may be made from one or more materials.
• Materials are selected according to their properties.
• Classification makes the study of materials simple and systematic.
• Metals are generally lustrous.
• Wood, paper and rubber are usually non-lustrous.
• Stone and iron are hard materials.
• Sponge and cotton are soft materials.
• Glass, air and clean water are transparent.
• Butter paper and frosted glass are translucent.
• Wood, brick and metals are opaque.
• Sugar and salt are soluble in water.
• Sand, chalk powder and sawdust are insoluble in water.
• Mass is measured in kilograms and grams.
• Volume of liquids is measured in litres and millilitres.
• Every material occupies space.
• Every material has mass.
• The properties of materials determine their uses.

Examples of Material Properties

Quick Revision

• Everything around us is made of matter.
• Materials are chosen according to their properties.
• Objects may be made from one or more materials.
• Classification makes the study of materials easier.
• Lustrous materials have a shiny surface.
• Hard materials resist scratching.
• Soft materials are easily compressed.
• Transparent materials allow light to pass through.
• Translucent materials allow only partial light.
• Opaque materials block light completely.
• Sugar and salt dissolve in water.
• Sand and chalk powder do not dissolve in water.
• Mass is measured in kilograms.
• Volume is the space occupied by matter.
• Every material has both mass and volume.

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