NCERT Solutions Class 6 Science Chapter 4

NCERT Solutions for Class 6 Science Chapter 4 – Sorting Materials into Groups

In nature, we find that there are many different kinds of materials that occur. Some materials are harder than others, some are soluble while others are not, some are transparent, etc. Sorting these materials into groups having similar properties has always been a major pursuit of Science so that these groups can be studied more effectively. In this chapter, students will learn how different naturally occurring materials are grouped based on their properties.

In order to help students with their preparation for this chapter, Extramarks offers NCERT Solutions for Class 6 Science Chapter 4. These are clear and concise solutions to all the questions presented in the textbook for this chapter that are prepared by subject matter experts. Since solving NCERT questions is a major part of a student’s preparation, having accurate solutions will help students prepare more effectively and efficiently. Students can access these solutions at any time from the links provided below.

NCERT Class 6 Science Other Chapters Solutions

NCERT Solutions for Class 6 Science Chapter 4 – Sorting Materials into Groups

NCERT Solutions of Class 6 Science Chapter 4: Sorting Materials into Groups

Here are the NCERT Solutions for Class 6 Science Chapter 4 with detailed answers that are simple to follow and comprehend. Once your concepts are clear, answering the exercise questions becomes much easier. The solutions provided here can be used as a starting point. Aside from that, these solutions will assist you in completing your assignments and homework in a timely manner.

Class 6 Science Chapter 4 Sorting Materials into Groups

There exists a vast array of objects of various shapes, colors, sizes, textures, and functions around us. All of these items are made of a common material. It is necessary to understand a material’s properties in order to use it for a specific application. The objects can be sorted based on their appearance, hardness or flexibility, solubility, insolubility, transparency, and so on. You’ll learn about all of these things in Class 6 Science Chapter 4, which will help you in categorizing various materials into groups.

4.1 Objects Around Us

This first section focuses on the importance of keeping various materials together as a group according to their applications in our everyday lives. 

Many objects such as books, lunch boxes, tables, chairs, matchboxes, toys and buckets, can be seen all around us. Now, let’s say we want to form a group of plastic objects. Buckets, lunch boxes and toys are among the items found in this category. 

Create a second group of wooden objects in the same way. We might come across a table, a chair or a matchbox. We frequently group materials for our own convenience in everyday life. We usually store things at home in such a way that similar items are grouped together. 

We can easily locate them with such an arrangement. Whenever we need clothes to wear, we look in the almirah and not the kitchen.. We don’t use a pen or pencil when we’re sick; instead, we use the doctor’s thermometer. Keep in mind that each material has a unique meaning. For our convenience and study of their properties, materials are grouped together. 

4.1 Properties of Materials

Section 4.2 of NCERT Class 6 Science Chapter 4 gives an overview of the various properties of materials that we see all around us. Its various properties include appearance, hardness, transparency, solubility, floatation, and heat and electricity conduction. We previously learned that each material has its own attributes or characteristics that differ from those of others. 

4.3 Appearance

Normally, each material has a distinct appearance. Wood and iron have very different appearances. Iron is identified with its shine and sound when struck. It has the ability to conduct heat and electricity, whereas wood does not. Metals are materials with certain properties such as lustre, sonority, and good heat and electricity conductivity. Metals include iron, copper, aluminium and gold to name a few. 

4.4 Hardness

Section 4.4 of Class 6 Science Chapter 4 explains the concept of hardness- how any material made of cotton or sponge feels soft when we touch it, whereas stone, wood and bricks feel hard. Soft materials, as we all know, are those that can be easily compressed, cut, bent or scratched. Soft materials include rubber bands, leaves, erasers, cooked rice and chapati. Hard materials, on the other hand, are materials that cannot be easily compressed, cut, bent, or scratched, such as metals, wood and stone.

4.5 Soluble or Insoluble

The solubility of materials in water can be used to classify them. Soluble substances, as you may know, are substances that dissolve completely in water. Sugar, salt, lemon juice and other ingredients fall into this category. The term “insoluble substance” refers to substances that don’t dissolve in water. Sand, chalk powder, dust, kerosene and so on. Immiscible liquids are those that do not blend completely with water. For example, oil. Oil and water do not mix under any circumstances. 

4.6 Objects may Float or Sink

Some materials float while others sink in water, as you may have noticed. Sand, sugar, salt and stone all sink in water. Floating materials include dry leaves, wax, oil, and wood. Water can float because most substances have a lower density than oil. Cotton balls, on the other hand, float at first but sink after a few minutes because they absorb water. 

4.7 Transparency

The last section of NCERT Class 6 Science Chapter 4 is about how transparency of materials can be used to classify them. If you and your friends are playing hide and seek, and they also hide behind a glass door. Are you able to identify them? Your answer will be a resounding ‘yes.’ Remember that ‘Transparent’ materials are those that allow you to see through them. Glass, water, air, and other materials are examples. Transparent materials allow nearly all light to pass through them, allowing the object or person behind them to be clearly seen. Opaque materials, such as wood, iron, and walls, are materials through which we cannot see anything. The term ‘translucent’ refers to materials that allow an object to be seen but not clearly. Muslin cloth is a light-weight, translucent fabric. Similarly, oil-stained paper is also an example.


A question-wise breakdown of the end-of-chapter exercise for this chapter is shown below: 

  • Two  short answer questions 
  • Make a Match of the five pairs given 
  • Eight Statements of True or False 
  • Categorize the following on the basis of the two criteria given 
  • Four questions of finding the odd one out from the set 

Key Features of NCERT Solutions of Class 6 Chapter 4 Science

When looking for the best study material that can assist students in all aspects of their exam preparation, it’s natural to have doubts about your choices. If you want to not only do well in your exams but also have a firm grasp on every concept you read about in a subject, there are a number of reasons to make Extramarks your first choice. Here’s why: 

  • To democratise learning for students, these NCERT Solutions are written in a very simple language, and are free for all. 
  • It will provide you with a comprehensive understanding of your subject.
  • Students can improve their science fundamentals, which are required for a higher level of science study.
  • You will develop a methodological and logical approach to science and other subjects.
  • The solutions will assist you in completing your homework by providing detailed explanations for all of the NCERT questions. 

FAQs (Frequently Asked Questions)

1. Are there any key terms to keep in mind while reading Chapter 4 of Class 6 Science?

Yes, students may go through the terms given below and revise concepts while reading NCERT Class 6 Science Chapter 4:

  • Retting is the process of softening jute stems that have been soaked in water for 20 days.
  • Ginning is the task of separating seeds from fibres. 
  • Spinning is the process of drawing out, twisting and winding fibres into a continuous yarn. 
  • Cotton boll is a cotton plant’s fruit.
  • Fabric refers to the material that our clothes are made of.
  • Combing is the process of fully forming cotton.
  • Yarn is a thin thread that is used to knit or weave.
  • Fibre is a term used to describe the hair-like material found in flowers and stems.

2. What are the benefits of reading NCERT books?

NCERT Books are designed and written with the goal of making learning easy and effective for all students. These books are intended to dispel any doubts you may have and to polish concepts, allowing you to have a good grasp of each and every topic in a subject, and as a result, achieve high exam scores.

3. What is the importance of this chapter in Class 6?

We can organise things into groups in a systematic way by grouping them. By sorting materials into groups, things are easier to manage. It is much easier to get a sense of the various properties of objects when they’re grouped. When two items are grouped, it is also easier to compare them. As a result, sorting or grouping can be extremely useful for identifying similar materials based on their physical or chemical characteristics.

4. What exactly are Physical Properties?

An observation or measurement of a material’s physical property does not change the substance’s identity. Colour, density, hardness, melting and boiling points are all examples of physical properties. Multiple materials have physical characteristics that distinguish them from one another and can be used to classify them into distinct categories. As a result, studying the physical properties of any substance may be advantageous.

5. How can I fortify my preparations for board exams and other competitive exams using the NCERT Solutions for Class 6 Science Chapter 4?

Science is a subject that requires practice. A student’s preparation of Science is incomplete unless they go through the NCERT questions given at the end of the chapter. Also, since many exam questions follow a very similar pattern as the questions presented in the NCERT textbook, going through NCERT Solutions by Extramarks will really help students prepare more efficiently and score better in their final exams.

6. What exactly does the term "chemical properties" imply?

A chemical property is a characteristic of a substance that can be observed during a chemical reaction. Flammability, toxicity, enthalpy of formation, pH value, oxidation states and chemical stability are some of the most important chemical characteristics. These are extremely important because they provide information about a product’s properties and can also be used to sort materials based on chemical properties.