EVENTS CONVENT HIGH SCHOOL
25/01/2022 CLASS- 6 SESSION 2021-22
SUBJECT :SCIENCE
CHAPTER-5
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1. Fill in the blanks:
(a) The method of separating seeds of paddy from its stalks is called .
(b) When milk, cooled after boiling, is poured onto a piece of cloth the cream (malai) is left behind on it. This process of separating cream from milk is an example of ______.
(a) Salt is obtained from sea water by the process of ____________ .
(b) Impurities settled at the bottom when muddy water was kept overnight in a bucket. The clear water was then poured off from the top. The process of separation used in this example is called ____________.
Ans.
(a) threshing
(b)filtration
(b) evaporation
(d) sedimentation and decantation
2. True or false?
(a) A mixture of milk and water can be separated by filtration.
(b) A mixture of powdered salt and sugar can be separated by the process of winnowing.
(c) Separation of sugar from tea can be done with filtration.
(d) Grain and husk can be separated with the process of decantation.
Ans.
(a) False
(b) False
(c) False
(d) False
VERY SHORT ANSWER TYPE QUESTIONS
1. What is strainer?
Ans. Strainer is a kind of sieve which is used to separate a liquid from solid.
2. Name the method used to separate cream from curd.
Ans. Centrifugation.
3. How will you separate mango from a mixture of mango and apple?
Ans. By picking.
4. You are given a mixture of salt and sand. Can you separate them by picking?
Ans. No, we cannot separate them by picking.
5. Name the method used to separate the pieces of stone from grain.
Ans. Handpicking.
SHORT ANSWER TYPE QUESTIONS
l. What is mixture?
Ans. When two or more than two substances are mixed together in any ratio then it is called a mixture.
2. Write various methods of separation of components from their mixture.
Ans.
- Handpicking
- Threshing
- Winnowing
- Sedimentation
- Decantation
- Filtration
- Evaporation
- Condensation
3. Define the term handpicking.
Ans. The process used to separate slightly larger particles from a mixture by hand is called handpicking. For example: Stone pieces can be separated from wheat or rice by handpicking.
4. What do you mean by threshing? Where is it used?
Ans. Threshing is a process in which we separate grain from stalks. This process is used by farmer to separate gram, wheat, rice, mustard seeds in his field.
5. Write three methods of separation.
Ans. Handpicking, threshing and winnowing.
6. How will you separate oil and water from their mixture?
Ans. Oil, being lighter than water, will float on it. Two distinct layers are formed and slowly oil is allowed to flow into another container and is separated from water. Separating funnel can also be used to separate the two.
