Sorting Materials into Group class 6 Science NCERT Solutions

Sorting Materials into Group class 6 Science NCERT Solutions: Sorting Materials into Group is the chapter 4 from class 6 Science NCERT. Here you'll get Sorting Materials into Group class 6 Science Questions Answers / Sorting Materials into Group class 6 Science NCERT Solutions. 

Sorting Materials into Group class 6 Science Summary/Main Points

Objects around us are made up of a large variety of materials. A given material could be used to make a large number of objects. It is also possible that an object could be made of a single material or of many different types of materials.

Different types of materials have different properties. Some materials are shiny in appearance while others are not. Some are rough, some smooth. Similarly, some materials are hard, whereas some others are soft.

Some materials are soluble in water whereas some others are insoluble. Some materials such as glass, are transparent and some others such as wood and metals are opaque. Some materials are translucent.

Materials are grouped together on the basis of similarities and differences in their properties. Things are grouped together for convenience and to study their properties.

Sorting Materials into Group class 6 Science Notes

The things, which we all use in our daily life are made up of different types of materials. All these materials have mass, shape and are classified based on many criteria, including their physical states, properties of materials, etc.

Materials are grouped for our convenience to study their properties. Based on the different properties, materials can be differentiated into their respective groups. Listed below are the properties of materials.

• States of matter: Solids, liquids and gases.
• Appearances: colour, texture, hard, soft and lustre.
• Soluble and Insoluble: Sugar, salt, sand, chalk

(The solubility depends on soluble and insoluble of materials in water. For example:- Sugar and salt are soluble in water. Sand and chalk are insoluble in water)

• Metal and non-metal: Iron, gold, rubber, coal

(For example:- Iron and gold are metal and rubber, are examples of non-metals.)

• Transparency: It is based on the light transmission through objects, which includes Opaque, Translucent and Transparent.

An object, which does not allow passage to light is called an opaque object. We cannot see through an opaque object. E.g; wood, metals.

An object, which allows partial passage to light is called a translucent object. E.g; plastic bottle, paper cup.

An object, which allows visible light to pass through it is called a transparent object. We can clearly see through a transparent object. E.g; glass, fish tank.

NCERT Solutions for Class 6 Science Sorting Materials into Group Chapter 4

Exercise

1. Name five objects which can be made from wood.

Ans: Table, Chair, Doors, Boat, Bed, Plough, Bullock Cart.

2. Select those objects from the following which shine:

Glass bowl,   plastic toy,   steel spoon,   cotton shirt

Ans: Glass bowl and steel spoon are shining objects.

3. Match the objects given below with the materials from which they could be made. Remember, an object could be made from more than one material and a given material could be used for making many objects.

                            Objects            Material

                              Book                   Glass

                              Tumbler             wood

                              Chair                  Paper

                              Toy                     Leather

                              Shoes                Plastics

Ans:                  Objects         Material

                            Book                   Paper, Wood

                           Tumbler          Glass, wood, plastic

                            Chair                  wood, plastic

                           Toy              Glass, Wood, Paper, Plastics, Leather

                            Shoes            Leather, Plastic

4. State whether the statements given below are True or False.

(i) Stone is transparent, while glass is opaque.

(ii) A notebook has lustre while eraser does not.

(iii) Chalk dissolves in water.

(iv) A piece of wood floats on water.

(v) Sugar does not dissolve in water.

(vi) Oil mixes with water.

(vii) Sand settles down in water.

(viii) Vinegar dissolves in water.

Ans: (i) False   (ii) False   (iii) False   (iv) True   (v) False   (vi) False   (vii) True   (viii) True

NCERT Solutions of Class 6 Science Sorting Materials into Group Chapter 4

5. Given below are the names of some objects and materials:

Water, basket ball, orange, sugar, globe, apple and earthen pitcher

Group them as:

(a) Round shaped and other shapes

(b) Eatables and non eatables

Ans: (a) (i) Round shaped: Basket ball, orange, globe, apple, earthen pitcher.

               (ii) Other shapes: Water, sugar.

          (b) (i) Eatables: Water, orange, sugar and apple.

               (ii) Non-eatables: Basket ball, globe and earthen pitcher.

6. List all items known to you that float on water. Check and see if they will float on an oil or kerosene.

Ans: (i) List of some items that float on water are Ice, Wood, Thermocol, Paper, Wax, Oil, Thin plastic sheets

(ii) List of items that float on an oil are Wood, Thermocol, Wax, Paper, Plastic sheet

(iii) List of items that float on kerosene are Thin plastic sheet, Paper, Thermocol

7. Find the odd one out from the following:

a) Chair, Bed, Table, Baby, Cupboard

b) Rose, Jasmine, Boat, Marigold, Lotus

c) Aluminium, Iron, Copper, Silver, Sand

d) Sugar, Salt, Sand, Copper sulphate

Ans: The odd one from the above listed items are as follows.

      (a) Baby     (b) Boat     (c) Sand     (d) Sand