it is all about Sepration of substances, HETEROGENEOUS MIXTURES,HOMOGENEOUS MIXTURE,PURE SUBSTANCES,IMPURE SUBSTANCES,METHORDS FOR SEPRATING THE CONSTITUENTS OF A MIXTURE,HAND PICKING,SIEVING,WINNOWING,THRESHING,SEDIMENTATION,DECANTATION,FILTRATION AND CHURNING,EVAPORATION,CONDENSATION.

6.  SEPRATION OF THE USEFUL
SUBSTANCES FROM UNWANRED
SUBSTANCES IS VERY COMMON IN
OUR DAY TO DAY LIFE AND IN
LABORATORIES/INDUSTRIES.IN DAY
TO DAY LIFE,WE USE SIMPLE
DEVICES TO CARRY OUT
SEPRATIONS.

8.  SIEVING ALLOWS THE FINE PARTICLES TO PASS THROUGH THE
HOLES OF A SIEVE WHILE BIGGER IMPURITIES REMAIN ON
SIEVE. E.G. SEPARATING BRAN FROM FLOUR.

11. SEDIMENTATION

12. • DECANTATION IS A PROCESS FOR THE
SEPARATION OF MIXTURES, BY REMOVING A
LAYER OF LIQUID, GENERALLY ONE FROM
WHICH A PRECIPITATE HAS SETTLED. THE
PURPOSE MAY BE EITHER TO PRODUCE A
CLEAN DECANT, OR TO REMOVE UNDESIRED
LIQUID FROM THE PRECIPITATE.

13. • FILTRATION IS THE METHORD USED FOR
SEPRATING INSOLUBLE SOLID PARTICLES FROM
THE LIQUID.
• CHURNING IS THE METHORD USED FOR
SEPRATING LIGHTER PARTICLES OF A SOLID
SUSPENDED IN A LIQUID.

15. • THE CHANGE OF A GAS OR VAPOR TO A
LIQUID, EITHER BY COOLING OR BY BEING
SUBJECTED TO INCREASED PRESSURE. WHEN
WATER VAPOR COOLS IN THE ATMOSPHERE,
FOR EXAMPLE, IT CONDENSES INTO TINY
DROPS OF WATER, WHICH FORM CLOUDS.