PW Class 6 Science Notes Chapter 6: Materials Around Us

Look around a classroom or home, and you will find objects made from paper, wood, glass, metal, plastic, cloth, and many other materials. Although these objects may differ in shape and purpose, the materials used to make them can be identified and grouped by their properties.

The PW Class 6 Science Materials Around Us Notes cover these basic ideas, including how materials are grouped according to appearance, hardness, transparency, solubility, mass, and volume. These notes can help students revise the important terms, examples, and differences covered in the chapter.

What Are Materials Around Us?

A material is any substance that is used to create an object. Different objects around us are made using different materials.

Some common materials include:

• Paper

• Wood

• Cloth

• Glass

• Metal

• Plastic

• Clay

Looking at the material an object is made from is one way to understand and classify the objects found around us.

How Can Materials Be Grouped?

Materials can be classified by observing their different properties. Grouping makes it easier to identify similarities and differences among materials.

Materials can be grouped according to properties such as:

• Shape

• Colour

• Hardness or softness

• Shine or dullness

• Material from which an object is made

For example, some materials have a shiny appearance, while others look dull. Similarly, some can be compressed or scratched easily, while others are hard.

What Are the Different Properties of Materials?

The properties of a material help describe how it looks and behaves. The chapter covers several properties that can be used to compare and classify materials.

1. Appearance of Materials

Materials often differ in their appearance. On the basis of shine, they can be described as lustrous or non-lustrous.

The shiny property of materials such as metals is known as lustre. In simple terms, lustrous means shiny, while non-lustrous means dull.

2. Hardness and Softness

Materials can also be compared according to how easily they can be compressed or scratched.

• Soft materials: Materials that can be compressed or scratched easily are considered soft. They have the property of softness.

• Hard materials: Materials that are difficult to compress or scratch are considered hard. They have the property of hardness.

3. Transparent, Opaque and Translucent Materials

Another way of classifying materials is by observing how they allow light to pass through them.

This classification helps distinguish materials based on how clearly something can be viewed through them.

4. Soluble and Insoluble Materials

Materials behave differently when they are added to water.

• Soluble materials dissolve in water. For example, sugar dissolves when added to water.

• Insoluble materials do not dissolve in water even after stirring. Sand in water is an example of an insoluble material.

How Are Heavy and Light Objects Compared?

Mass is a property used to measure how heavy or light an object is. The notes also discuss weight, a term commonly used when referring to how heavy something is when measured.

The relationship given in the chapter notes can be understood as:

• Heavier object → More mass → Dense object → Sinks in water

• Lighter object → Less mass → Less dense object → Floats on water

What Are Space and Volume?

Every object occupies some amount of space. Volume refers to the amount of space occupied by an object.

The volume of liquids can be measured using:

• Litres (L)

• Millilitres (mL)

For example, the amount of water in a container can be expressed in litres or millilitres depending on the quantity.

What Is Matter?

Matter is anything that takes up space and has mass. Two important ideas connected with matter are mass and volume.

• Mass: The amount of matter present in an object. It is measured in grams (g) or kilograms (kg).

• Volume: The space taken up by matter. It can be measured in litres (L) and millilitres (mL).

Mass and Volume at a Glance

How Does PW Support Materials Around Us Revision?

The PW Class 6 Science Notes for Materials Around Us can be used at different stages of chapter preparation, from revisiting basic definitions to practising questions based on material properties.

• Revise Chapter Concepts in One Place

Students can return to the PW notes to revise lustre, hardness and softness, transparency, solubility, mass, volume and matter without reading the complete chapter again.

• Compare Similar Material Properties

Closely related concepts can be revised side by side, such as lustrous vs non-lustrous, hard vs soft, transparent vs translucent vs opaque, and soluble vs insoluble. This can help students keep their meanings and examples separate.

• Move to PW NCERT Solutions for Textbook Questions

Once the concepts are clear, PW Class 6 NCERT Solutions can help students work through chapter questions and see how definitions and properties are applied while writing answers.

• Practise with PW Most Important Questions

PW Class 6 Most Important Questions can be used for additional practice after revision. Students can check whether they can identify, compare and explain the different properties covered in the chapter.

• Check Preparation with PW Sample Papers

PW Class 6 Sample Papers provide broader practice once students have covered multiple chapters. They can be used to check recall, practise answering different question types and identify concepts that need another round of revision.

The Materials Around Us chapter builds an understanding of why materials differ and how their properties can be used to classify them. PW Class 6 Science Notes can help students keep these classifications, examples and basic measurements organised during revision, while the related PW resources provide the next step for textbook and exam practice.