Important Notes for CBSE Class 6 Science Chapter 4 – Sorting Materials into Groups. Sorting Materials into Groups Class 6 Notes and Study Material Download in PDF form.
Sorting Materials into Groups Notes | Sorting Materials into Groups Class 6 Notes | Sorting Materials into Groups Quick Revision | Sorting Materials into Groups Class 6 Quick Revision Notes | Science Class 6 Ch 4 Notes | NCERT Class 6 Science Chapter 4 Notes PDF.
Object :
Object is a things that is made up of one or more material .
Example : pencil , chair , pen , book , food item , etc
Material :
Material is what object is made up of.
Example : pencil is made up of wood , metal , graphite , etc.
Object around us made up of large variety of materials:
Sr.No |
Object | Material the are made up of |
1 | Chair |
Wood , plastic, iron |
2 |
Toys | Wood , plastic, Paper |
3 | Shoes |
Leather |
4 |
Clothes | Cotton, silk, polyester , nylon |
5 | Tumbler |
Plastic, glass |
6 |
Utensils | Plastic, iron , aluminium , steel |
7 | Pen |
Plastic , metal, wood . |
Grouping:
The process of classification of Object based on some known criteria is called grouping.
Why do we group them?
There are too many object around us . That’s why we need to group them.
Properties of materials :
- Appearance :
The various parameters governing the appearance of materials are colour , texture , roughness , Shape, size etc.
- Lustrous:
Materials that shine are called lustrous material.
Example : Gold. , Silver , copper , etc .
- Non- lustrous:
Materials which do not shine are called non-lustrous materials.
Example: wood , plastic .
- Hardness :
You cannot change the shape of hard materials by pressing it or cut it easily .
Hardness materials used to make vehicle , machine ,and furniture etc.
- Soft :
You can easily change the shape of soft materials by pressing it or scratching it.
Soft materials used to make cushion and clothing .
- Ductility :
Ductile materials can be drawn into wires.
Example : copper , aluminium , etc.
- Malleability :
A solid materials is said to be malleable if it can be beaten or pressed into sheath or foil.
Example : Gold , silver . Etc.
Transparency:
a) Transparent :
Those substance and materials through which can be seen are called transparent .
Example : glass , water , air , and some plastic.
b) Opaque :
Materials through which we are not able to see are called opaque..
Example : wood , metal , plastic , cardboard , wall , tree etc.
c) Translucent :
The materials which object can be seen , but not clearly , are known as translucent.
Example : oiled paper , frosted glass etc.
Float or sink
a) Float on water:
Object which are less denser than water , will be float on water.
Example : plastic bottles, rubber ball , leaves , balloon etc.
b) Sink in water :
Object which are denser than water will be sink in water.
Example : sand , stone , coins etc.
Solubility :
The ability of substance to dissolve in water is called solubility.
a) Soluble :
Substance that completely disappeared or dissolved in water are known as soluble substance.
Example : sugar , salt etc.
b) Insoluble :
Substance that do not mix with water or do not disappear even after we stir long time are known as insoluble substance .
Example: sand , stone , oil , etc.
Sorting Materials into groups Class 6 Notes @Net Explanations