Magnetic separation Sedimentation
Decantation Adulteration Filtration
* Matter is anything that has mass and
* All matter is made up of extremely
* Matter is classified into solids,
liquids and gases on the basis of two important factors .
a. The way the particles are arranged
b. The way the particles attract each
* Difference between the properties of
solids, liquids and gases is due to the difference in the arrangement of the
particles and the nature of the attractive forces between them.
* A pure substance can be an element
or a compound and is made up of only one kind of particles.
* A mixture is an impure substance
containing two or more components physically mixed in any proportion.
* Separation of mixtures is done
1. to remove harmful components
2. to obtain the useful component
3. to obtain a substance in a highly
* Separation method to be adopted
depends on the properties of the components.
* Handpicking – For smaller quantities
containing particles reasonably large in size to be recognised can be picked by
* Winnowing – Adopted to separate
lighter solids from heavier ones
* Magnetic separation – Used to
separate magnetic substance from non-magnetic substance
* Sedimentation – Settling down of
suspended, insoluble and heavy solid particles (used to separate solid – liquid
* Decantation- Process of pouring out
the clear supernatant liquid without disturbing the sediment
* Filtration –Process of separating
insoluble solid particles (residue) from a liquid (filtrate) by using a filter
* Adulteration – make impure by the
addition of a foreign or inferior substance.
Lets play with Science kids
* To learn more about the matter
around us type Science Kids in the Google browser and select games Go inside
and select matter. Now the following logo can you drag will appear on the
screen. Then click ok.
* Three divided columns will appear on
the screen. The first section is for solid and the second section is for liquid
and the third one is for gas. Now when we press this symbol, at the bottom
items will appear at the bottom. We have to drag them to their respective