Separation of Substances class 6 | worksheet

Premium Separation of Substances class 6 | worksheet
Share this

´╗┐Separation of Substances class 6 | worksheet & Printable

´╗┐Separation of Substances class 6. Download Separation of Substances class 6 worksheet based on the latest CBSE syllabus including MCQ on Separation of Substances, define, long questions, short answer type, diagram based questions and more.

separation of  substances class 6

Various methods of separations

1. Handpicking: Handpicking method of separation means separating using hand or manually, handpicking can be used for separating slightly larger sized impurities like the pieces of dirt, stone, and husk from wheat, rice or pulses. The quantity of such impurities is usually not very large. This method is used by our mom especially to separate stones from rice or wheat.

2. Threshing: You must have seen bundles of wheat or paddy stalks lying in fields after harvesting the crop. Stalks are dried in the sun before the grain is separated from them. Each stalk has many grain seeds attached to it.One may pluck mangoes or guavas from the trees. But, grain seeds are much smaller than mangoes or guavas. So, plucking them from their stalks would be impossible. The process that is used to separate grain from stalks etc. is threshing. In this process, the stalks are beaten to free the grain seeds Sometimes, this mixture on a plate or a newspaper.

3. Winnowing: Winnowing is used to separate heavier and lighter components of a mixture by wind or by blowing air This method is commonly used by farmers to separate lighter husk particles from heavier seeds of grain The husk particles are carried away by the wind. The seeds of grain get separated and form a heap near the platform for winnowing. The separated husk is used for many purposes such as fodder for cattles.

4. Sieving: Sieving allows the fine flour particles to pass through the holes of the sieve while the bigger impurities remain on the sieve. In a flour mill, impurities like husk and stones are removed from wheat before grinding it. Usually, a bagful ofefore grinding it. Usually, a bagful of wheat is poured on a slanting sieve. The sieving removes pieces of stones, stalk and husk that may still remain with wheat after threshing and winnowing. Sieving is used when components of a mixture have different sizes.

Sedimentation, Decantation and Filtration

When the heavier component in a mixture settles after water is added to it, the process is called sedimentation When the water (along with the dust) is removed, the process is called decantation The same principle is used for separating a mixture of two liquids that do not mix with each other. For example, oil and water from their mixture can be separated by this process.

The process of conversion of water into its vapour is called evaporation. The process of evaporation takes place continuously wherever water is present.

When the steam comes in contact with the metal plate cooled with ice, it condenses and forms liquid water. The water drops that you observed falling from the plate, were due to condensation of steam. The process of conversion of water vapour into its liquid form is called condensation.

  • Tags :
  • Separation of substances class 6

You may like these also

© 2022 Witknowlearn - All Rights Reserved.