SORTING MATERIALS INTO GROUPS(POST -5 )

GOOD MORNING BOYS! 

In the last class you learnt about magnetic and nonmagnetic materials and about conductors and nonconductors of electricity.

A QUICK RECAP!( Answer in -YES/NO)

1. Is wood a magnetic material?

2. Can cooking utensils be made of plastic ?

3. Will a piece of iron get attraced by a magnet?

4. Is rubber a non conductor of electricity?

LEARNING OUTCOMES OF THIS CLASS-

By the end of this class you will be able to-

- group materials based on their similarities.

-list properties which form the basis of grouping.

- list the advantages of grouping.

Things you see around you may be similar in some ways. Things  which are similar in one or more ways can be grouped together. 

Some properties that form the basis of grouping are-

. shape     .colour   .size    .texture   . taste    .hardness

. physical state      . nature (living or nonliving ; natural or manmade)

SOME EXAMPLES OF GROUPING ARE -

GROUPING OF SIMILAR SHAPES-

GROUPING OF THINGS IN A GROCERY STORE

GROUPING OF LIVING AND NONLIVING THINGS

   

    

THINGS GROUPED IN A STATIONARY SHOP-

THINGS GROUPED IN A KITCHEN-

TRY THIS!

Go to the kitchen in your house. Observe how your mother has placed (grouped) different utensils ? Can you think of a reason for her to do this ? 

 You will agree that your mother grouped things 

- if they had similarities in one or more way.

- for convenience.

-out of need.

Grouping things with similar properties together is called classification.

Classification of things into groups-

-makes it easier to work with them.

-helps us to learn their properties.

THINK ABOUT  THIS!

-Do you place things in your school bag in a particular way?

- Do you keep your  clothes  in your cupboard in a particular way ?

Why do you think you do this ?

DO THE EXERCISES GIVEN BELOW IN YOUR NOTEBOOK-

10. Define the term classification.

ans: Grouping things with similar properties together is called classification.

11.  What are the advantages of clasification ?

ans : Classification  of things into groups-

-makes it easier to work with them.

-helps us to learn their properties.

12. What is the basis of grouping things?

ans:  Things  which are similar in one or more ways can be grouped together , for convenience and out of need.

 With this we come to the end of this lesson. Have a good day !