Separation of Substances
|Threshing (courtsey: wikipedia)|
Q1: The method of separating substances based on size, colour and shape is called _______.
Q2: The process used for separating grains from stalk is called _________.
Q3: Which method is commonly used by farmers to separate lighter husk particles from heavier seeds of grain.
Q4: Pebbles and stones are removed from sand by ________
Q5: The heavier component in a mixture settles after water is added to it, the process is called ________
Q6: In sedimentation process, the clear liquid above the settled heavier component is called ________.
(c) supernatant liquid
Q7: Transferring the clear liquid into another container using a glass rod is called ___________.
Q8: During filtration process, the dust particles which remain on filter paper is called _________.
Q9: Which method is commonly used to separate salt from water?
Q10: The process of converting vapours back into liquid is called as ______.
1: (a) Handpicking
2: (c) Threshing
3: (a) Winnowing
4: (b) Sieving
5: (a) sedimentation
6: (c) supernatant liquid
7: (b) decantation
8: (b) residue
9: (c) evaporation
10: (d) condensation