Sorting Materials into Groups | Science 6th | Chapter 4 | Questions and Answers

JANDKNCERT | Science 6^th |

Sorting Materials into Groups | Science 6th | Chapter 4 | Questions and Answers

 

Chapter 4: Sorting Materials into Groups

 

Introduction

In Chapter 3, we learnt about the Fibre to Fabric. How and where fibres are obtained. We get fibres from plants, such as jute, cotton, coconut etc. and animal fibres from silkworms and wool of lamb. We learnt about knitting, spinning, weaving, and ginning. Now we know about synthetic and natural fibres.

In this chapter, you will learn about Sorting Materials into Groups. The following points will help you to understand this chapter easily.

•     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 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, based on, similarities and differences in their properties.

•     Things are, grouped for convenience and to study their properties.

 

Let us try to answer some questions taken from the NCERT Book of Science Class 6th. This Exercise is taken from the same book.

 

Exercises

Q1. Name five objects which can be made from wood.

 

Answer.

Chair, bed, window, book rack, bat, can be made from wood.

 

Q2. Select those objects from the following which shine:

Glass bowl, plastic toy, steel spoon, cotton shirt

 

Answer.

Steel spoons and glass bowls are the objects that shine.

 

Q3. 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	Materials
Book	Glass
Tumbler	Wood
Chair	Paper
Toy	Leather
Shoes	Plastics

 

Answer.

 

Objects	Materials
Book	Paper
Tumbler	Glass
Chair	Wood
Toy	Plastics
Shoes	Leather

 

 

Q4. State whether the statements given below are True or False.

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

Ans. False

 

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

Ans. False

 

(iii) Chalk dissolves in water.

Ans. False

 

(iv) A piece of wood floats on water.

Ans. True

 

(v) Sugar does not dissolve in water.

Ans. False

 

(vi) Oil mixes with water.

Ans. False

 

(vii) Sand settles down in the water.

Ans. True

 

(viii) Vinegar dissolves in water.

Ans. True

 

Q5. Given below are the names of some objects and materials:

Water, basketball, orange, sugar, globe, apple and earthen pitcher

Group them as:

 

(a) Round shaped and other shapes

Ans. Basketball, orange, and globe are round-shaped and apple, earthen pitcher are other shaped.

 

(b) Eatables and non-eatables

Ans. Orange, sugar, and apples are eatables and basketball, globe, earthen pitcher are non-eatables.

 

Q6. List all items known to you that float on water. Check and see if they will float on an oil or kerosene.

 

Answer.

Wood, paper, leaves, flowers, plastic, polythene are some items that float on water.

 

Q7. Find the odd one out from the following:

a) Chair, Bed, Table, Baby, Cupboard

Ans. Baby

 

b) Rose, Jasmine, Boat, Marigold, Lotus

Ans. Boat

 

c) Aluminium, Iron, Copper, Silver, Sand

Ans. Sand

 

d) Sugar, Salt, Sand, Copper sulphate

Ans. Sand