Important Questions for CBSE Class 6 Science Chapter 2 - Sorting Materials into Groups

Fill in the blanks 1-mark

1. Name one object made from wood?

Ans: Table

Other examples can be chairs, sofas, almirah, etc.

2. Name one shining object? 

Ans: Glass bowl.

Other examples can be diamonds, metal, wrapping paper, etc.

3. Name one item that floats on water? 

Ans: Paper 

Other examples can be pieces of paper, wood, plastic bottles, boats, ice, etc.

4. Name one material that floats on oil? 

Ans: Wood 

Other examples can be balloons. 

5. Name one material that floats on kerosene? 

Ans: Thin plastic sheet

Very Short Answer Questions     2 - Mark

1. Define solid. 

Ans: Any material with a definite shape and volume is considered solid. For instance, boxes, stones, wood, and chairs. 

2. What is liquid? 

Ans: Any material that does not have a definite shape but has a definite volume is referred to as a liquid. For instance, water, milk, and oil.

3. What is gas? 

Ans: Any material that has neither a definite shape nor a definite volume is referred to as a gas. For instance, oxygen, nitrogen, and hydrogen. 

4. Define the term soluble.  

Ans: Soluble refers to something that can be dissolved, such as sugar or salt that are soluble in water.

5. Define the term insoluble. 

Ans: Insoluble refers to anything that does not dissolve. Oil, for instance, does not dissolve in water.

6. Name two gases which are insoluble in water. 

Ans: Hydrogen and nitrogen are the two gases insoluble in water.  Another example is methane which is insoluble in water.

7. Define the word transparent. 

Ans: The term "transparent material" refers to a material that allows light to pass through it. Some transparent objects are water, air, glass, etc.

8. Define the word translucent. 

Ans: Translucent materials allow only a little amount of light to flow through them. Plastic cups, clouds, coloured plastic etc. are examples of translucent objects. 

9. Define metals. 

Ans: Metals are hard, shiny, and excellent electrical conductors. Copper, silver, gold, and other metals are examples of metals.

10. Define non-metals. 

Ans: Non-metals are fragile and do not conduct electricity well. They aren't really glossy. Coal and rubber are examples. 

Long Answer Questions 5-mark 

1. Name three states of matter and their characteristic properties? 

Ans: Solid, liquid, and gas are the three states of matter. 

Characteristics of solid, liquid, and gases are listed below: 

2. Describe an experiment to show that the palm is translucent? 

Ans: The experiment consists of the following steps: 

1. With the help of your palm, cover the glass of a torch in the dark place.

2. Switch on the torch.

3. Observe the light from the other side of the palm.

Observation: Some part of the light passes through the palm but not all passes through it. This shows that our palm is translucent.

3. Why is the grouping of the objects helpful? 

Ans: Objects must be grouped in order to be easily and quickly located. It's also useful to know whether the grouped objects are finished or not. This is especially useful for shopkeepers. He'll be able to tell if his stock is finished or not.

Extra Questions on Sorting Materials into Groups Class 6

Very Short Answer Type Questions

1. In a blue-coloured solution of water and a dye, which is solvent and which is solute?

Answer: Dye is the solute and water is the solvent in the resulting solution.

2. What are combustible materials?

Answer: Materials that burn on heating at a certain temperature are called combustible materials.

3. Classify the below materials as translucent or transparent or opaque:

Cardboard, water, glass, oily paper, stone, wood, and metal.

Answer: Glass and water are transparent, oily paper is translucent, whereas cardboard, stone, wood, and metal are opaque.

Short Answer Type Questions

1. How is the density of an object related to its floating or sinking?

Answer: An object will float only when its density will be less than the surrounding liquid and it will sink when its density will be greater than the surrounding liquid.

2. When water and starch are mixed together, what kind of solution will you get?

Answer: When you mix a small amount of starch with water, it easily gets dissolved in the water. But when the amount of starch increases, the resulting solution starts thickening and forms a suspension.

3. Why do some metals become dull and lose their shine?

Answer: Some metals lose their shine and become dull because metals when exposed to air react with gases and moisture present in them, and as a result, form a thin layer of oxide, carbonate, or sulphide.

Long Answer Type Questions

1. How is the grouping of objects helpful for a shopkeeper?

Answer: The proper grouping of objects makes the work of a shopkeeper easier in the following ways:

(i) When we go to buy some particular items, the shopkeeper can easily and quickly locate that particular object because there are different shelves to put different objects and similar objects are kept at one place. 

(ii) It can be easily noticeable what stocks are going to finish and what he should purchase for his customers.

2. Prove that common salt, sugar, and washing soda are soluble in water but iodine, chalk powder, and sand are insoluble in water.

Answer: For the experiment, take six test tubes and fill in each of these tubes about half with water. Each of these test tubes needs to be kept in a test tube stand. Then, add a little amount of each of these six substances to six different test tubes. Shake them well and allow them to stand for some time. You will see that sugar, common salt, and washing soda gets dissolved in the water whereas chalk powder, iodine, and sand are insoluble in water.

3. How does the appearance of an object help us to sort out different materials? Explain with an activity.

Answer: First, gather some small pieces of different materials such as paper, cardboard, wood, copper wire, aluminium sheet, and chalk. Then, you need to separate the shiny materials into a group. Now cut each of these materials into two pieces and observe the freshly cut surface. You will notice that the freshly cut surfaces appear shiny. 

Therefore, these objects are shiny materials. You can also rub the surface of these materials with sandpaper to see if it has lustre. The materials with such lustre are usually metals and examples of such metals include copper, iron, aluminium, and gold. Hence, you can differentiate the materials according to the lustre.

CBSE Science Class 6 Chapter 2 Important Questions PDF

Important Questions for CBSE Class 6 Science Chapter 2 are provided for the students to get familiarised with the concepts of Sorting Materials Into Groups. These important questions serve as very important study materials for the students appearing for CBSE Class 6 examination. 

Download these notes on Important Questions for Class 6 Science Chapter 2 for free from our website. You can download these in PDF format for free.

An Overview of Chapter 2 Sorting Materials into Group

Objects around us - In everyday life, we like grouping materials for our convenience. We can see many objects around us, like books, lunch boxes, tables, toys, and buckets. 

Now if we wish to make a group of objects that are made of plastic. We find toys and lunch boxes in this group. 

Similarly, we make another group of objects that are made from wood for which we may find a table, chair, matchbox, etc. 

Properties of Materials - In this module, you will get questions on the properties of materials like their appearance, hardness, transparency, solubility, floatation, and conduction of heat and electricity.

• The Appearance of Materials - Materials like iron and wood differ from each other. Iron shines and conducts electricity, while wood doesn’t have either of these properties.

• The Hardness of Materials - Materials that require energy to compress, cut, or bend are hard materials. For example, wood, stone, metals, etc.

• Soluble or Insoluble - Substances like oil and ghee are insoluble in water, while chalk powder and sand are soluble in water.

• Objects Floating in Water - Materials like wood, wax, and oil float on water. Talking about the cotton ball, initially, it remains at the surface of the water, and then it absorbs water and sinks to the bottom of the vessel. 

• Transparency of Materials - We can group materials on the basis of transparency. For example, suppose you are playing hide and seek with your friends and they keep themselves behind a glass door. 

Can you locate them? Your answer will be ‘yes’. It’s because materials through which things can be seen are called ‘Transparent’, such as water, glass, air, etc.

Important Terms for Chapter 2 Sorting Materials into Group 

1. Fibre: A fibre is a thin material found in stems and flowers.

2. Yarn: A yarn is a thread used for knitting and weaving.

3. Combing: It is a process of making the cotton fluffy. It’s like preparing cotton for manufacturing with a comb.

4. Fabric: Clothes we wear are fabric.

5. Retting: A process by which jute stems dipped in water for 20 days get softened. 

6. Ginning: A process of separating seeds from fibres.

7. Cotton Ball: Fruits of the cotton plant are cotton balls.

8. Spinning: It is a process of drawing out, twisting (curling), and winding fibres into a continuous yarn.

Key Learnings from Class 6 Chapter 2 Sorting Materials into Groups

1. There are two types of fibres, viz, natural and synthetic fibre.

2. Clothes protect us from extreme heat and cold weather conditions.

3. We obtain jute from the bark of the jute plant.

4. We can obtain fibres like cotton and jute from plants.

5. Cotton is the most important fibre.

6. Weaving and knitting help us make fabric from yarns.

7. Cotton clothes are soft and comfortable to wear.

8. We like to wear different types of clothes at different times and places.

Benefits of Studying Important Questions on Class 6 Science Chapter 2 - Sorting Materials Into Groups

The following are some of the prime benefits of studying important questions on Chapter 2 Sorting Materials Into Groups.

• Important Questions for Class 6 Science Chapter 2 are prepared by our expert faculty, with vast experience in this subject and by keeping in mind the latest CBSE guidelines. 

• Each and every question and answer are explained in a step-by-step manner to help the students in clearing their doubts about the chapter. 

• By studying these questions and answers on a regular basis, students will be well prepared for the exam and can fetch good marks in the Class 6 examination.

Important Related Links for CBSE 6 Science

Conclusion

Vedantu's Important Questions for CBSE Class 6 Science Chapter 2 - Sorting Materials into Groups, provide a comprehensive and valuable resource for students studying this topic. With a focus on organizing materials based on their properties and characteristics, these questions enable students to strengthen their understanding of the subject. The well-crafted questions cover a wide range of concepts, encouraging critical thinking and problem-solving skills. Vedantu's approach fosters a deeper grasp of the material and aids students in their exam preparation. By utilizing these resources, students can enhance their learning experience and excel in their academic pursuits. Overall, Vedantu's Important Questions are an excellent tool for CBSE Class 6 Science students to excel in their studies.