Science NCERT Grade 6, Chapter 4, Sorting Materials into Groups is broadly divided into two sections wherein the first section i.e. Objects Around Us consists of two main concepts. The first one deals with the objects and the materials from which they are made. This part of the chapter uses many daily life examples making the understanding of the topic more understandable. The second concept tries to explain the fact that how a single material can be used to make several other objects based on their properties. Both the concepts are dealt with the help of activities whose conclusions are presented in a tabular format. The second section of the chapter covers a comprehensive discussion of various properties of materials. Some important properties discussed are -

  • appearance (lustre)
  • hardness (soft or hard)
  • solubility (soluble and insoluble)

Apart from these, two other properties like density (floats or sinks) and transparency (opaque, translucent and transparent) are explained with the help of relevant activities, examples and diagrams.

The chapter, Sorting Materials into Groups covers the following topics:

  1. Objects around Us
  2. Properties of Materials

Page No 33:

Question 1:

Name five objects which can be made from wood.

Answer:

Five objects that can be made from wood are:

(i) Table

(ii) Chair

(iii) Bed

(iv) Door

(v) Bullock cart

Page No 33:

Question 2:

Select those objects from the following which shine:

Glass bowl, plastic toy, steel spoon, cotton shirt

Answer:

Glass bowl and steel spoon

Page No 33:

Question 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.

Object

Material

Book

Glass

Tumbler

Wood

Chair

Paper

Toy

Leather

Shoes

Plastics

Answer:

Object

Material

Book

Paper

Tumbler

Glass, plastic

Chair

Wood, plastic

Toy

Wood, paper, plastic

Shoes

Leather

Page No 33:

Question 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 an 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.

Answer:

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

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

(iii) Chalk dissolves in water. (False)

(iv) A piece of wood floats on water. (True)

(v) Sugar does not dissolve in water. (False)

(vi) Oil mixes with water. (False)

(vii) Sand settles down in water. (True)

(viii) Vinegar dissolves in water. (True)



Page No 34:

Question 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

Answer:

(a) Round-shaped: Basketball, orange, globe, apple, earthen pitcher

Other shapes: Water, sugar

(b) Eatables: Water, orange, sugar, apple

Non-eatables: Basketball, globe, earthen pitcher

Page No 34:

Question 6:

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

Answer:

Some items that float on water are listed below:

1. Plastic bottle

2. Piece of paper

3. Piece of sponge

4. Piece of thermocol

5. Wood

6. Bamboo

7. Plastic ball

8. Cork

However, none of these items floats on oil or kerosene.

Page No 34:

Question 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

Answer:

(a) Baby

(b) Boat

(c) Sand

(d) Sand



View NCERT Solutions for all chapters of Class 6