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Important Question Answers
Methods of Separation in Everyday Life
Class -6
Subject-Science
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1 Mark Questions
What is winnowing?
- Winnowing is the process of separating lighter particles like husk from heavier particles like grains using air or wind.
Name a method to separate cream from milk.
- Churning.
What is filtration used for?
- Filtration is used to separate insoluble solids from liquids.
What remains in the sieve during sieving?
- Bigger particles, such as stones or bran, remain in the sieve.
What type of materials can be separated using a magnet?
- Magnetic materials like iron, nickel, and cobalt.
2 Marks Questions
What is sedimentation?
- Sedimentation is the process where heavier particles settle down at the bottom of a liquid when left undisturbed.
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.
Give two examples where sieving is used.
- Removing stones from flour.
- Separating sand from pebbles.
3 Marks Questions
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.
Write any three uses of filtration.
- Separating tea leaves from tea.
- Purifying drinking water.
- Separating mud particles from muddy water.
5 Marks Questions
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.
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.
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 |
True/False Questions
- Magnetic separation can be used to separate plastic from iron nails. True
- Winnowing is used to separate stones from rice. False (It separates husk from grains.)
- Evaporation can separate salt from seawater. True
- Decantation removes all solid particles completely. False (Some particles may remain.)
- Churning is used to separate butter from curd. True
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