Available Answers

1. 1.

   Fill in the blanks.

   1. It is important to eat __________ food to maintain good health.
   2. The process of separating the grains from the plant is known as __________.
   3. Powdered husk can be separated from flour by __________.
   4. __________ method is also used in coal mines.
   5. Separating the clear liquid from the sediment is known as __________.
   6. __________ is a process in which alum is added to the muddy water.
   7. Funnel and a filter paper is used in __________ method.
   8. The process of changing water into its vapour is called __________.
2. 2.

   Tick (√) the correct answer:

   1. The crop is harvested when the ___________ fully develops.
      1. fruits
      2. buds
      3. flowers
      4. grains
   2. Hand picking can be used for ___________ slightly larger sized impurities.
      1. combining
      2. joining
      3. separating
      4. removing
   3. Winnowing is done with the support of ___________.
      1. light
      2. wind
      3. kindness
      4. water
   4. The ___________ layer of the clear liquid is the supernatant layer.
      1. top
      2. middle
      3. low
      4. bottom
3. 3.

   Fill in the following blanks:

   1. Salt is obtained from seawater by the process of _______________.
   2. Mixture of chalk and water can be separated by _______________.
   3. In the kitchen, the grains are cleaned by _______________.
   4. Housewives use _______________ method to remove undesirable substances from eatables.
   5. In the process of filtration the clean liquid obtained is called _______________.
4. 4.

   Write 'T' for true and 'F' for false:

   1. Farmers clean the grains by hand picking.
   2. Solution of salt in water can be separated by filtration.
   3. Filter paper is used in the process of evaporation.
   4. Milk is not a mixture.
5. 5.

   Match the following:

   Column I	Column II
   1. Separation of grains from chaff	(a) Evaporation
   2. Separation of dissolved salt	(b) Sieving
   3. Separation of a mixture of mud and water	(c) Winnowing
   4. Separation of larger particles from smaller ones	(d) Loading

    

6. 6.

   Which process is used for separating grain from husk or chaff?