Methods of Separation in Everyday Life-Important Question Answers-Class 6-Science

Important Question Answers

Methods of Separation in Everyday Life
Class -6
Subject-Science

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1 Mark Questions

1. What is winnowing?

   • Winnowing is the process of separating lighter particles like husk from heavier particles like grains using air or wind.

2. Name a method to separate cream from milk.

   • Churning.

3. What is filtration used for?

   • Filtration is used to separate insoluble solids from liquids.

4. What remains in the sieve during sieving?

   • Bigger particles, such as stones or bran, remain in the sieve.

5. What type of materials can be separated using a magnet?

   • Magnetic materials like iron, nickel, and cobalt.

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2 Marks Questions

1. What is sedimentation?

   • Sedimentation is the process where heavier particles settle down at the bottom of a liquid when left undisturbed.

2. How is decantation different from filtration?

   • In decantation, the liquid is gently poured off after sedimentation, while filtration uses a filter to remove insoluble solids.

3. Give two examples where sieving is used.

   • Removing stones from flour.
   • Separating sand from pebbles.

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3 Marks Questions

1. What is the difference between evaporation and condensation?

   • Evaporation: Conversion of liquid into vapor due to heat.
   • Condensation: Conversion of vapor back into liquid when cooled.
   • Evaporation is used to separate dissolved solids like salt from water, while condensation collects the vapor as liquid.

2. Write any three uses of filtration.

   • Separating tea leaves from tea.
   • Purifying drinking water.
   • Separating mud particles from muddy water.

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5 Marks Questions

1. Describe the steps to separate a mixture of sand, water, and sugar.

   • Step 1: Add water to the mixture to dissolve sugar.
   • Step 2: Filter the mixture to remove sand as residue.
   • Step 3: Heat the filtrate (sugar solution) to evaporate water.
   • Step 4: Collect sugar crystals after evaporation.

2. Explain the process of obtaining salt from seawater.

   • Step 1: Seawater is collected in shallow pits.
   • Step 2: Sunlight heats the water, causing evaporation.
   • Step 3: The water evaporates, leaving behind salt.
   • Step 4: The salt is further purified before use.

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Match the Following

Column I	Column II
Separating husk from grains	Winnowing
Separating salt from seawater	Evaporation
Removing tea leaves from tea	Filtration
Separating oil from water	Decantation
Separating stones from flour	Sieving

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True/False Questions

1. Magnetic separation can be used to separate plastic from iron nails. True
2. Winnowing is used to separate stones from rice. False (It separates husk from grains.)
3. Evaporation can separate salt from seawater. True
4. Decantation removes all solid particles completely. False (Some particles may remain.)
5. Churning is used to separate butter from curd. True

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