Class 6 Exam > Class 6 Notes > Science for Class 6 > Unit Test: Methods of Separation in Everyday Life
Unit Test: Methods of Separation in Everyday Life | Science for Class 6 PDF Download
Attempt all questions.
Time: 1 hour
M.M. 30
- Question numbers 1 to 7 carry 1 mark each.
- Question numbers 8 to 12 carry 2 marks each.
- Question numbers 13 to 15 carry 3 marks each.
- Question number 16 carries 4 marks each.
Q1: The method of separating small stones and husk from grains by picking with hands is called __________. (1 Mark)
Q2: The process of beating stalks to separate grains from them is known as __________. (1 Mark)
(i) Winnowing
(ii) Threshing
(iii) Sieving
(iv) Filtration
Q3: Separating heavier grains from lighter husk using wind or blowing air is called __________. (1 Mark)
Q4: The method used to separate bran from wheat flour based on particle size is __________. (1 Mark)
(i) Evaporation
(ii) Sieving
(iii) Decantation
(iv) Churning
Q5: Obtaining salt from seawater by allowing water to evaporate in sunlight is an example of __________. (1 Mark)
Q6: The settling of heavier tea leaves at the bottom of tea before pouring is called __________. (1 Mark)
(i) Filtration
(ii) Sedimentation
(iii) Magnetic separation
(iv) Handpicking
Q7: Separating iron nails from sawdust using a magnet is an example of __________. (1 Mark)
Q8: Explain briefly how threshing helps farmers prepare grains for storage or cooking. (2 Marks)
Q9: Why is winnowing not effective in a closed room without wind? (2 Marks)
Q10: Describe the role of a sieve in preparing wheat flour for cooking. (2 Marks)
Q11: How does decantation differ from filtration? (2 Marks)
Q12: Differentiate between sedimentation and decantation with an example from tea preparation. (2 Marks)
Q13: Describe the method to obtain salt from sea water. (3 Marks)
Q14: Explain how churning is used to separate butter from curd, and why the butter floats on top. (3 Marks)
Q15: Discuss the significance of magnetic separation in recycling waste materials. (3 Marks)
Q16: A mixture contains sand, salt, iron filings, and pebbles. Outline a stepwise procedure to separate all components using methods. (4 Marks)
You can access the solutions of this Unit Test here.
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FAQs on Unit Test: Methods of Separation in Everyday Life - Science for Class 6
| 1. What are the different methods of separation used in everyday life? |  |
Ans. The different methods of separation used in everyday life include filtration, evaporation, distillation, magnetic separation, and manual sorting. Each method is used based on the physical properties of the substances involved, such as solubility, size, and magnetic properties.
| 2. How does filtration work as a method of separation? | |
Ans. Filtration works by passing a mixture through a filter, which allows the liquid to pass while trapping solid particles. This method is commonly used to separate solid impurities from liquids, such as in water purification or when making coffee.
| 3. What is evaporation and how is it used in separating mixtures? | |
Ans. Evaporation is the process of converting a liquid into vapor, usually by heating. This method is used to separate a soluble solid from a liquid solution, as seen when salt is obtained from seawater by evaporating the water, leaving the salt behind.
| 4. Can you explain the process of distillation? | |
Ans. Distillation is a separation technique that involves heating a liquid to create vapor and then cooling the vapor to obtain the liquid again. It is used to separate mixtures based on different boiling points, such as separating alcohol from water in the production of spirits.
| 5. What role does magnetic separation play in everyday life? | |
Ans. Magnetic separation is a method used to separate magnetic materials from non-magnetic ones. This technique is commonly applied in recycling processes to extract metals from waste or in mining to separate iron ores from other materials.
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