NCERT Solution and Notes Class 6 Science Chapter-4

NCERT Solution And Notes.                           Class 6  Science

   Chapter 4- Sorting Materials                 Into Groups

Here you can access all NCERT solution for class 6 science chapter 4-Sorting Materials Into Groups. You can also get chapter's notes that is based on NCERT book of science.

Notes Of Ncert Class 6 Science Chapter-4 Sorting Materials Into Groups are given below

4.1 OBJECTS AROUND US

We can see lots of objects around us like a pen, book, table, chair, cycle, toys and many other objects. All these objects have different shapes, colours and uses.

All objects around us are made of one or more materials. Those materials may be glass, metal, plastic, wood, cotton, paper and mud

4.2 PROPERTIES OF MATERIALS

There are different properties of materials:- 

Appearance- Materials usually look different from each other. Wood looks very different from iron. Iron appears different from copper or aluminium.

Hardness:- Materials can be divided into two types soft and hard.

Materials which can be compressed or scratched easily are called soft materials.

While other materials, which are difficult to compressed are called hard materials.

Soluble or insoluble:- substance which completely dissolve in water are called soluble. Other substances do not mix with water and do not disappear even after we stir for a long time called insoluble in water.

Objects May Float Or Sink In Water:- things float, when they are less dense than the fluid in which they are floating. Things need to have a greater ratio of empty space to mass then the fluid.

Transparency:- 

Transparent- Those substances or materials through which things can be seen are called transparent.e.g - plastic , glass.

Translucent- The materials through which objects can be seen, but not clearly.e.g- oily paper.

Opaque- Unable to see through them. e.g Metals.

EXERCISE SOLUTION FOR NCERT SCIENCE CLASS 6  CHAPTER 4- SORTING MATERIALS INTO GROUPS

Q1. Name five objects which can be made from wood.
Ans:-
    Table, chair, door, box and bed.

Q2. Select those objects from the following which shine:
Glass bowl, plastic toy, Steel spoon, cotton shirt.
Ans:-
  Glass bowl and steel spoon.

Q3. Match the objects given below event 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
Ans-
      Objects                   Materials
   Book           -              Paper
   Tumbler.   -              glass, plastic
   Chair          -              wood, plastics
   Toy             -               wood, paper, plastics
   Shoes         -               leather

Q4. State whether the statements given                 below are true or flase  

(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 float 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

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

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

Group them as:

(a) Round shaped and other shapes

(b) Eatables and non eatables.

Ans-

(a) Rounded shaped objects:- Basket ball,            orange, Apple , globe ,earthen pitcher.

    Other shapes:- water, sugar

(b) Eatable objects:- water, orange, sugar,             apple.

     Non eatable objects:- basketball, globe,            earthen pitcher.

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

Ans-

Items that can float on water-

a. Wood

b. Oil

c. Paper

d. Thin plastic sheet

e. Balloon

Items that can float on oil-

a. Paper

b. Balloon

c. Plastic sheet

d. Wood

Items that can float on kerosene-

a. Paper

b. Thin plastic sheet

c. Balloon

Q7. Find the odd one out from the following:

a) Chair, Bed, Table, Baby, Cupboard

b) Rose, Jasmine, Boat, Marigold, Lotus

c) Aluminium, Iron, Cover, Silver, Sand

d) Sugar, Salt, Sand, Copper sulphate.

Ans-

a) Baby-because all others are non living.

b) Boat-because all others are flowers.

c) Sand- because all others are metals.

d) Sand- because all others are soluble in          water.