Methods of Separation in Everyday Life Class 6 Extra Questions and Answers Science Chapter 9

Methods of Separation in Everyday Life Class 6 Extra Questions and Answers Science Chapter 9

Methods of Separation in Everyday Life Class 6 Very Short Answer Type Questions

Question 1.
What is ktrainer?
Answer:
Strainer is a kind of sieve which is used to separate a liquid from solid.

Question 2.
Name the method used to separate cream from milk.
Answer:
hurning

Question 3.
How will you separate mango from a mixture of mango and apple?
Anwer:
By handpicking

Question 4.
You are given a mixture of salt and sand. Can you separate them by handpicking?
Answer:
No, we cannot separate them by handpicking.

Question 5.
Name the method used to separate the pieces of stone from grain.
Answer:
Handpicking

Question 6.
How can you separate grains from stalk?
Answer:
We separate grains from stalk by threshing.

Question 7.
What types of material can we separate by using handpicking?
Answer:
The materials having different size and colour can be separated by handpicking.

Question 8.
Name the other methods used to separate solid materials of different size.
Answer:
Sieving.

Question 9.
Name the process used to separate heavier and lighter components of a mixture.
Answer:
Winnowing.

Question 10.
Can the above stated method be used if both the components have same weight?
Answer:
No, this method cannot be used.

Question 11.
What is evaporation?
Answer:
The process of conversion of water into vapour is called evaporation.

Question 12.
Name the method by which we get salt from ocean water.
Answer:
Evaporation.

Question 13.
Define condensation.
Answer:
The process of conversion of water vapour into liquid form is called condensation.

Question 14.
Write opposite process of evaporation.
Answer:
Condensation.

Question 15.
Name the method used to separate a mixture of two insoluble liquids.
Answer:
Sedimentation and decantation.

Question 16.
Which method is used to separate husk from wheat grain?
Answer:
Winnowing method.

Question 17.
What is Sedimentation?
Answer:
When the heavier component of a mixture settle down in the container is known as Sedimentation.

Question 18.
Define the term magnetic separation.
Answer:
Separation of magnetic and non-naagnetic substances by using a magnet is called magnetic separation.

Methods of Separation in Everyday Life Class 6 Short Answer Type Questions

Question 1.
What is mixture?
Answer:
When two or more than two substances are mixed together in any ratio then it is called a mixture.

Question 2.
Write various methods of separation of components from their mixture.
Answer:

1. Handpicking
2. Threshing
3. Winnowing
4. Sedimentation
5. Decantation
6. Filtration
7. Evaporation
8. Condensation

Question 3.
Define the term handpicking.
Answer:
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.

Question 4.
What do you mean by threshing? Where is it used?
Answer:
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 the field.

Question 5.
Write three methods of separation.
Answer:
Handpicking, threshing and winnowing.

Question 6.
How will you separate oil and waterfrom their mixture?
Answer:
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.

Separation of liquids by separating funnel

Question 7.
What is evaporation?
Answer:
The process of conversion of water into vapour is called evaporation. This process takes place continuously where water is present. Common salt from seawater is obtained using this method.

Question 8.
Define winnowing.
Answer:
The process is used to separate components from a mixture in which one component is heavier or lighter than other is called winnowing. Winnowing is done with the help of wind of by blowing air.

Question 9.
What do you mean by sieving? Give an example.
Answer:
Sieving allows the fine flour particles to pass through the holes of the sieve while the bigger particles or impurities remain on the sieve. For example, in a flour mill, impurities like husk and stones are removed from wheat before grinding it.

Question 10.
Match the column:

Separation process	Purpose for which we do the separation	What do we do with the separated components?
(1) Separate stones from rice	(a) To separate two different but useful components.	(i) We throw away the solid component.
(2) Churning milk to obtain butter	(b) To remove non-useful components.	(ii) We throw away the impurities.
(3) Separate tea leaves	(c) To remove impurities or harmful components.	(iii) We use both the components.

Answer:

Separation process	Purpose for which we do the separation	What do we do with the separated components?
(1) Separate stones from rice	(c) To remove impurities or harmful components.	(ii) We throw away the impurities.
(2) Churning milk to obtain butter	(a) To separate two different but useful components.	(iii) We use both the components.
(3) Separate tea leaves	(b) To remove non-useful components.	(i) We throw away the solid component.

Methods of Separation in Everyday Life Class 6 Long Answer Type Questions

Question 1.
What is threshing?
Answer:
Threshing is a process that is used to separate grain from stalks. In this process the stalks are beaten to free the grain seeds. Sometimes threshing is done with the help of bullocks. Machines are also used to thresh large quantities of grain.

Question 2.
Describe the method to obtain salt from sea water.
Answer:
Sea water contains many salts mixed in it. One of them is common salt, when sea water is allowed to stand in shallow pits, water gets evaporated by sunlight and slowly turns into water vapour. In a few days, the water evaporates completely leaving behind the solid salts. Common salt is then obtained from this mixture of salts by further purification.

Question 3.
What is decantation?
Answer:
Decantation is a process of separation of insoluble solids from liquid. The suspension of solid particles in liquid is allowed to stand for some time. The solid particles then settle down at the bottom of the container and clean water goes up. Without disturbing the settled particles, the clean water is transferred into other container.

Question 4.
Where is decantation used? Give two examples.
Answer:
(i) Decantation is used to separate insoluble solids or liquid from liquid. Rain water is a mixture of mud and water. It is purified by decantation.
(ii) Oil and water also get separated by this method because oil floats up.

Question 5.
How will you prepare cheese (paneer)?
Answer:
For making paneer, a few drops of lemon juice are added to milk as it boils. This gives a mixture of particles of solid paneer and liQuestion uid. The paneer is then separated by filtering the mixture through a fine cloth or strainer.

Question 6.
Explain the method that can be used for separating the following mixture:
(i) Sand and husk
(ii) Wheat, sugar and stalk
(iii) Water and petrol
(iv) Rice and salt
(v) Sand and salt
Answer:
(i) Mixture of sand and husk: Sand and husk can be separated by the method of sieving.
(ii) Mixture of wheat, sugar and stalk: For separating stalk from the mixture we should follow the winnowing method because stalk is lighter than other two components and get separated. Wheat and sugar can be separated by sieving because they are of different sizes.
(iii) Mixture of water and petrol: Water does not dissolve in petrol. So, it can be separated by decantation.
(iv) Mixture of rice and salt: Rice and salt can be separated by sieving.
(v) Mixture of sand and salt: Sand and salt is mixed with water, salt dissolves in water and sand can be separated from the solution by sedimentation and decantation followed by filtration. After that by evaporation common salt can be separated.

Methods of Separation in Everyday Life Class 6 Skill-Based Questions

Question 1.
Observe the following diagram and answer the questions given below:

(i) Suggest a caption/title to the process shown in figure.
(ii) What method is used in this process?
Answer:
(i) Separation of tea leaves with, a strainer.
(ii) Filtration

Question 2.
The following diagram shows the method used in taking out butter from milk and curd. Answer the questions after observing the diagram carefully.

(i) What is the name of this process?
Answer:
Churning

(ii) Explain the process.
Answer:
Churning involves rotation of milk/curd at a high speed. Cream being lighter collects towards the centre. The cream floating on the surface of defatted milk can be separated by sieving.

Question 3.
Observe the figure given below. Write what process of separation of substances it indicates.

Answer:
The diagram depicts removal of pebbles and stones from sand by sieving.

Question 4.
In the diagram given below is a part of the process adopted to obtain common salt from sea water. Observe it and answer the following questions.

(i) Name the process of obtaining salt (solid) from the sea water as shown in the figure.
(ii) Define the process involved in obtaining salt from sea water at the first stage.
Answer:
(i) Evaporation
(ii) The process of conversion of water into vapour is called evaporation.

Question 5.
The following figure indicates two processes. Identify and write their names.

Answer:
(a) Evaporation
(b) Condensation

Question 6.
Draw a diagram to show the winnowing.
Answer:

Question 7.
Observe the figure and answer the following Question.

1. What does the figure show?
Answer:
Handpicking

2. Name two mixtures which are separated by this method.

Answer:
(i) Mixture of stone and rice.
(ii) Mixture of wheat grains and mustard.

Methods of Separation in Everyday Life Class 6 Case-Based Questions

Question 1.
A mixture containing iron nails, sand, black pepper, stones, common salt and water. Which steps will you follow to separate each component of a mixture? The given steps may help you to think like a scientist.
1. Which component should I separate first?
Answer:
By using a magnet first of all separate iron nails as they are magnetic in nature. Magnetic Separation Stones can be handpicked if they are small in quantity or can be separated by filtration method.

2. What method of separation should I use first?
Answer:
Magnetic Separation

3. How can we separate these components effectively?
Answer:
Stones can be handpicked if they are small in quantity or can be separated by filtration method.

4. Will some of the components be soluble in water?
Answer:
Common salt being soluble in water goes into the filtrate through filtration method.

5. What properties of the components can help us in their separation?
Answer:
By evaporation process, salt can be separated from water. We left with black pepper and sand, sand being heavier will settle down on sedimentation and black pepper being lighter will float over layer of water and can be separated by decantation.

6. What is the most appropriate sequence?
Answer:
Thus, the most appropriate sequence is magnetic separation, followed by handpicking, followed by filtration and sedimentation- decantation. Evaporation method is done with filtrate only.

Question 2.
Winnowing is used by farmers for separating lighter husk particles (bhoosa) from heavier grains of wheat. The farmer takes the mixture in a winnow (chhaj) and drops it from a height. He also shakes the winnow. The husk being lighter flies away with the wind and the wheat being heavier falls near his feet.

The separation of grains and husk is more conveniently and Question uickly done by a farm combine-harvester. It automatically harvests the crop, threshes it and then separates the husk from the grains.

A farm combine-harvester

Process used to separate grains from stalks is called threshing. In the process of threshing, the stalks are beaten to free grain seeds. This process of threshing can be done with the help of bullock. Machines are generally used to thresh large quantities of grain.
A sieve (chhalni) has a fine net or gauze fixed on a wooden or metal frame. It is used for separating fine particles from the bigger ones. The mixture is put in the sieve and shaken by hand or by machine. The finer particles pass through the sieve and drop down. The bigger ones remain behind.


Grating used for grading of cashew nuts, pebbles I. What is a sieve called in hindi language?
II. Which animal is useful in threshing?
III. Write the lighter and heavier parts of winnowing.
IV. Which machine we used for doing winnowing quickly?
Answer:
I. Chhalni.
II. Bullock
III. Husk is lighter and grains of wheat heavier.
IV. A farm combine-harvester

Class 6 Science Extra Questions