1. Paheli bought a bag of assorted veggies, including potatoes, green chilies, lady's finger, French beans, and green peppers. Which of the subsequent methods of division would be best for her to use to separate them?
(a). Winnowing
(b). Sieving
(c). Threshing
(d). hand-picking
1. Paheli bought a bag of assorted veggies, including potatoes, green chilies, lady's finger, French beans, and green peppers. Which of the subsequent methods of division would be best for her to use to separate them?
(a). Winnowing
(b). Sieving
(c). Threshing
(d). hand-picking
Explanation:
(d) Hand-selecting
The best approach for sorting the vegetables because of their large size is by handpicking.
2. The grandma of Boojho has diabetes. Her physician suggested her to have "Lassi" with less fat. Which of the following approaches should Boojho use to prepare it?
(a) Filtration
(b) Decantation
(c) Churning
(d) Winnowing
2. The grandma of Boojho has diabetes. Her physician suggested her to have "Lassi" with less fat. Which of the following approaches should Boojho use to prepare it?
(a) Filtration
(b) Decantation
(c) Churning
(d) Winnowing
Explanation:
Churning (c)
By churning the curd, butter (fat) is separated, and the leftover lassi has less fat.
3. Using the filtration procedure, which of the following mixes could you separate?
(a) Cornflakes in milk (b) Milk with oil (c) Salt in water (d) Milk with sugar
3. Using the filtration procedure, which of the following mixes could you separate?
(a) Cornflakes in milk (b) Milk with oil (c) Salt in water (d) Milk with sugar
Explanation:
(b): Milk and cornflakes
Cornflakes can be separated using the filtration process since they are insoluble in milk.
4. Which of the following techniques is best for separating grains from stalk bundles?
(a) Hand-picking
(b) winnowing
(c) sieving
(d) threshing
4. Which of the following techniques is best for separating grains from stalk bundles?
(a) Hand-picking
(b) winnowing
(c) sieving
(d) threshing
Explanation:
Threshing (d)
The best way for separating grains from clusters of stalks is threshing.
5. Here are four blends.
(i) Chickpeas with kidney beans
(ii) rice with beans
(iii) cornflakes with rice
(iv) stale biscuits and potato wafers
Which of these can be separated using the winnowing technique?
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (iii) and (iv)
5. Here are four blends.
(i) Chickpeas with kidney beans
(ii) rice with beans
(iii) cornflakes with rice
(iv) stale biscuits and potato wafers
Which of these can be separated using the winnowing technique?
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (iii) and (iv)
Explanation:
(d): Biscuits and potato wafers; rice flakes and maize.
Because the weight of the two components is different and one is lighter than the other, mixes of rice flakes and corn, potato wafers and biscuits can be separated using the winnowing process. Because the weight of the two components differs—one is lighter and the other is heavier—and because mixes of rice flakes and maize, potato wafers and biscuits can be separated using the winnowing method.
6. Paheli discovered the flour to be used had wheat grains mixed in when making chapatis. Which of the following techniques is best for separating grains from flour?
(a) Threshing (b) sieving (c) winnowing (d) Filtration
6. Paheli discovered the flour to be used had wheat grains mixed in when making chapatis. Which of the following techniques is best for separating grains from flour?
(a) Threshing (b) sieving (c) winnowing (d) Filtration
Explanation:
Sieving (b)
Due to the size difference between flour and grain, flour can be separated from wheat grains via the sifting process. The sieve won't let the wheat grain through.
7. You may have seen how butter and cream are used to make ghee at home. Which approach(es) can be applied to separate the ghee from the waste?
(i) evaporation
(ii) decantation
(iii) Filtration
(iv) Churning
What combination of the following is the right response?
(a) only (i) and (ii) (b) only (ii) and (iii) (c) only (ii) and (iv) (d) only (iv)
7. You may have seen how butter and cream are used to make ghee at home. Which approach(es) can be applied to separate the ghee from the waste?
(i) evaporation
(ii) decantation
(iii) Filtration
(iv) Churning
What combination of the following is the right response?
(a) only (i) and (ii) (b) only (ii) and (iii) (c) only (ii) and (iv) (d) only (iv)
Explanation:
Decantation and filtering (b)
Decantation and filtration are two techniques that can be used to separate ghee, which is liquid, from the residue, which is solid.
8. A small amount of solid copper sulphate was dissolved in a tumbler that was only halfway full of water for the activity. Which approach would you employ in order to recover solid copper sulphate from the solution?
(a) Decantation (b) evaporation (c) sedimentation (d) Condensation
8. A small amount of solid copper sulphate was dissolved in a tumbler that was only halfway full of water for the activity. Which approach would you employ in order to recover solid copper sulphate from the solution?
(a) Decantation (b) evaporation (c) sedimentation (d) Condensation
Explanation:
Evaporation is (b).
We can employ the method of evaporation to recover solid copper sulphate from the solution. The solid copper sulphate is left behind when the water in the copper sulphate solution evaporates.
9. Boojho brings water to his classroom in a clear plastic container during the summer. He left his bottle in the school one day. There was still some water in the bottle. The next day, he saw several water droplets on the interior surface of the bottle's empty section. These water droplets were created as a result of
(a) boiling and condensation
(b) evaporation and saturation
(c) condensation and saturation
(d) boiling and condensation.
9. Boojho brings water to his classroom in a clear plastic container during the summer. He left his bottle in the school one day. There was still some water in the bottle. The next day, he saw several water droplets on the interior surface of the bottle's empty section. These water droplets were created as a result of
(a) boiling and condensation
(b) evaporation and saturation
(c) condensation and saturation
(d) boiling and condensation.
Explanation:
(c): Condensation and evaporation
The summertime heat caused the water to heat up in the plastic container and evaporate, forming the water droplets. This occurs as a result of the vapours reaching the bottle's lid and condensing to produce water droplets that accumulate on the empty section.
10. Boojho was requested by Paheli for a drink of water. She received a glass of icy water from him. When Paheli noticed several water droplets on the glass's outside, she questioned Boojho how they came into existence. What one of the following should Boojho respond with?
(a) The glass's water evaporates.
(b) Water dripping from the glass.
(b) The atmospheric water vapour evaporates.
(d) The atmospheric water vapour condenses.
10. Boojho was requested by Paheli for a drink of water. She received a glass of icy water from him. When Paheli noticed several water droplets on the glass's outside, she questioned Boojho how they came into existence. What one of the following should Boojho respond with?
(a) The glass's water evaporates.
(b) Water dripping from the glass.
(b) The atmospheric water vapour evaporates.
(d) The atmospheric water vapour condenses.
Explanation:
(d): Atmospheric water vapour condensation.
The water droplets were created when air touched the ice-cold glass's surface and the water vapour from the atmosphere condensed to create droplets of water on the glass's exterior.
11.In order to win a game, Sheela, Saima, and Ravi must dissolve the most sugar possible in the same amount of milk. Saima drank ice-cold milk, whereas Ravi drank hot, boiling milk. Milk was acquired by Sheela at room temperature. Who do you anticipate winning the match, and why?
11.In order to win a game, Sheela, Saima, and Ravi must dissolve the most sugar possible in the same amount of milk. Saima drank ice-cold milk, whereas Ravi drank hot, boiling milk. Milk was acquired by Sheela at room temperature. Who do you anticipate winning the match, and why?
Explanation:
With warmth, solids become more soluble in liquids.
Since he will be able to dissolve the most sugar in hot, boiling milk, Ravi will triumph in the game.
The least amount of sugar will dissolve in the ice-cold milk thanks to Saima's ability.
When the milk is room temperature, Sheela will be able to dissolve the sugar more easily than Saima.
12. Use the correct words to complete the gaps.
(i) Rice can be cleaned of small particles of stone by .
(ii) Through threshing____ are extracted from stalks.
(iii) The usual method for removing the husk from wheat flour is .
(iv) The settling of heavier particles is referred to as .
(v) Filtering is useful for separating an intractable substance from something else.
12. Use the correct words to complete the gaps.
(i) Rice can be cleaned of small particles of stone by .
(ii) Through threshing____ are extracted from stalks.
(iii) The usual method for removing the husk from wheat flour is .
(iv) The settling of heavier particles is referred to as .
(v) Filtering is useful for separating an intractable substance from something else.
Explanation:
(i) hand-selecting
(ii) Cereals
(iii). sieving
(iv) Sedimentation
(v) liquid, solid
13. Indicate the truth or falsity of the following assertions.
(a) Filtration can be used to separate an oil and water mixture.
(b) Evaporation can be used to separate water from salt.
(c) Sieving can be used to separate a mixture of wheat flour and grains.
(d) A magnet can separate a mixture of iron filings and rice flour.
(e) Winnowing can be used to separate a mixture of rice flakes and wheat grains.
(f) Decantation can be used to separate a milk and tea leaf mixture.
13. Indicate the truth or falsity of the following assertions.
(a) Filtration can be used to separate an oil and water mixture.
(b) Evaporation can be used to separate water from salt.
(c) Sieving can be used to separate a mixture of wheat flour and grains.
(d) A magnet can separate a mixture of iron filings and rice flour.
(e) Winnowing can be used to separate a mixture of rice flakes and wheat grains.
(f) Decantation can be used to separate a milk and tea leaf mixture.
Explanation:
These are the claims:
(a) False as an oil and water mixture can be separated using a separating funnel.
(b) True
(c) True
(d) True
(e) True
(f) True
14. Identify and briefly describe a technique that can be used to separate a combination of husk from grains. What is the methodology's guiding principle?
14. Identify and briefly describe a technique that can be used to separate a combination of husk from grains. What is the methodology's guiding principle?
Explanation:
The husk can be removed from grains using the winnowing procedure.
The lighter husk is swept away by the air and reaming falls to the ground when the combination is allowed to fall from a height.
This approach is based on the idea that lighter particles in a mixture of different weights are carried away by the wind.
15. Match the mixtures in column I with their method of separation in column II.
Column I Column II
(a) Oil mixed in water (i) Sieving
(b) Iron powder mixed with four (ii) Hand-picking
(c) Salt mixed with water (iii) Decantation
(d) Lady’s figure mixed with French beans (iv) Magnet
(e) Rice flour mixed with kidney beans (v) Evaporation
15. Match the mixtures in column I with their method of separation in column II.
Column I Column II
(a) Oil mixed in water (i) Sieving
(b) Iron powder mixed with four (ii) Hand-picking
(c) Salt mixed with water (iii) Decantation
(d) Lady’s figure mixed with French beans (iv) Magnet
(e) Rice flour mixed with kidney beans (v) Evaporation
Explanation:
The correct match is:
Column I Column II
(a) Oil mixed in water (iii) Decantation
(b) Iron powder mixed with four (iv) Magnet
(c) Salt mixed with water (v) Evaporation
(d) Lady’s figure mixed with French beans (ii) Hand-picking
(e) Rice flour mixed with kidney beans (i) Sieving
16. Mohan and Sarika were each requested to prepare a salt solution. Mohan received twenty teaspoons of salt and half a glass of water, whereas Sarika received one teaspoon of salt and the same amount of water.
(i) How would they create solutions of salt?
(ii) One who could create a saturated solution?
16. Mohan and Sarika were each requested to prepare a salt solution. Mohan received twenty teaspoons of salt and half a glass of water, whereas Sarika received one teaspoon of salt and the same amount of water.
(i) How would they create solutions of salt?
(ii) One who could create a saturated solution?
Explanation:
(i) A salt solution can be created by combining salt and water and stirring continuously.
(ii) Even after mixing the maximum amount of salt with water, Mohan will be able to make a saturated solution if some salt is left undissolved.
17. Paheli was feeling thirsty, but there was only a pot of dirty, unfit-for-drinking water at the house. If Paheli had access to the following items, how do you think she would have made this water safe to drink?
[Alum, tub, muslin, pan, thread, and lid.]
17. Paheli was feeling thirsty, but there was only a pot of dirty, unfit-for-drinking water at the house. If Paheli had access to the following items, how do you think she would have made this water safe to drink?
[Alum, tub, muslin, pan, thread, and lid.]
Explanation:
Alum, a tub, muslin fabric, a gas cooker, thread, a pan, and a lid were provided.
The following actions could be taken by Paheli to purify the water.
First, use a muslin cloth to filter the murky water.
Now, bind the alum piece with thread, immerse it in water for a while, and then leave the water alone.
The water from the top can be decanted after a while as the contaminants will eventually settle at the bottom.
Now place the decanted water in a covered pan and bring to a boil for 10 minutes. When it has cooled, filter the water.
Drinkable water has been filtered.
18. To finish the "WISE FARMER" tale, read it and select the appropriate answer.
The farmer's healthy wheat crop was ready for harvest, which made him sad or joyful. He cut down the crops and let the stalks dry in the sun or rain. He hand-picked/threshed the seeds to separate them from the bundles of stem. He intended to remove the stones and husk after gathering the seed grains. His wife sieved/hand-picked it after winnowing/threshing them to separate the husk from the stones. She milled the wheat and filtered or sieved the flour. The astute farmer's wife received a fair price for the flour. Could you explain why?
18. To finish the "WISE FARMER" tale, read it and select the appropriate answer.
The farmer's healthy wheat crop was ready for harvest, which made him sad or joyful. He cut down the crops and let the stalks dry in the sun or rain. He hand-picked/threshed the seeds to separate them from the bundles of stem. He intended to remove the stones and husk after gathering the seed grains. His wife sieved/hand-picked it after winnowing/threshing them to separate the husk from the stones. She milled the wheat and filtered or sieved the flour. The astute farmer's wife received a fair price for the flour. Could you explain why?
Explanation:
(i) Happy
(ii) Sun
(iii) Threshed
(iv) Winnowed
(v) Handpicked
(vi) Sieved
Because they followed the right procedures to obtain high-quality flour, the wise farmer and his wife were able to sell their flour for a fair price.
19. A mixture of salt, sand, oil, and water is given to you. Describe the procedures for removing oil, sand, and salt from the mixture using a graphic and an activity.
19. A mixture of salt, sand, oil, and water is given to you. Describe the procedures for removing oil, sand, and salt from the mixture using a graphic and an activity.
Explanation:
By following these methods, a mixture of salt, sand, oil, and water can be separated:
1. Remove the oil from the mixture's floating portion. such that the oil is separated.
2. Strain the combination. A salt solution will be present in the filtrate after the sand has been separated. Sand is thus separated.
3. Let the salt solution evaporate. Salt is therefore separated.
20. You are given a mixture of iron nails, salt, oil, and water. Provide step-by-step instructions for separating each ingredient from the mixture.
20. You are given a mixture of iron nails, salt, oil, and water. Provide step-by-step instructions for separating each ingredient from the mixture.
Explanation:
The steps listed below can be used to separate a mixture of iron nails, salt, oil, and water:
(i) Iron nails can be manually removed or drawn to a magnet to be removed.
(ii) By using a separating funnel or the decantation process, oil can be extracted.
(iii) Evaporate the salt and water solution using the evaporation method. As a result, the water can be condensed again, leaving the salt at the bottom behind.
