Question 1 :
Write the method of separation of the following pair of compounds: Oil mixed in water

Question 2 :
During summer, Boojho carries water in a transparent plastic bottle to his school. One day he left his bottle in the school. The bottle still had some water left in it. The following day, he observed some water droplets on the inner surface of the empty portion of the bottle. These droplets of water were formed due to ______.

Question 3 :
Fill in the blanks with appropriate words: __________ are obtained from stalks by threshing.

Question 4 :
A person makes a mixture of dry sand with sawdust or powdered dry leaves and keeps this mixture on a plate or a newspaper. Next, he looks at this mixture carefully. Are the sizes of particles of the two components similar?

Question 5 :
How would you obtain clear water from a sample of muddy water?

Question 6 :
State whether the following statements are TRUE or FALSE : A mixture of wheat grains and rice flakes can be separated by winnowing.

Question 8 :
Which method of separating tea leaves from prepared tea is better, decantation or filtration?

Question 9 :
What is the purpose for which we do the following separation process? Separate tea leaves.

Question 10 :
Which amongst the following methods would be most appropriate to separate grains from bundles of stalks?

Question 11 :
Read the story 'WISE FARMER' and choose the correct option to complete the story. After gathering the seed grains he wanted to separate the stones and husk from it. His wife __________ them to separate the husk and later____________ to remove stones from it.

Question 12 :
A person mixes some soil to water in a glass and lets it stand for half an hour. Some soil settles at the bottom of water. Now, he slightly tilts the glass without disturbing the water and lets the water from the top flow into another glass as shown in the figure. What will you call this process?

Question 13 :
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 ______

Question 14 :
What is the purpose for which we do the following separation process? Separate stones from rice.

Question 15 :
A person mixes some soil to water in a glass and lets it stand for half an hour. Some soil settles at the bottom of water. Now, he slightly tilts the glass without disturbing the water and lets the water from the top flow into another glass as shown in the figure. Is the water in the second glass still muddy or brown in colour?

Question 16 :
Read the story 'WISE FARMER' and choose the correct option to complete the story. He harvested the crops and left it under the ___________ to dry the stalks.

Question 17 :
Fill in the blank: 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 ___________.

Question 18 :
Boojho's grandmother is suffering from diabetes. Her doctor advised her to take 'Lassi' with less fat content. Which of the following methods would be most appropriate for Boojho to prepare it?

Question 19 :
State true or false. A mixture of powdered salt and sugar can be separated by the process of winnowing.

Question 21 :
To prepare a dish with a flour, its needed to remove impurities and bran that may be present in it. What do we do?

Question 22 :
Four mixtures are given below: (i) Kidney beans and chickpeas (ii) Pulses and rice (iii) Rice flakes and corn (iv) Potato wafers and biscuits . Which of these can be separated by the method of winnowing?

Question 23 :
Fill in the blanks with appropriate words: Husk from wheat flour is generally removed by ___________.

Question 24 :
Sheela, Saima and Ravi have to dissolve maximum amount of sugar in the same amount of milk so as to win in a game. Ravi took hot boiling milk while Saima took ice cold milk. Sheela managed to get milk at room temperature. Whom do you think would win the game?

Question 25 :
A person needs to separate salt and water from the decanted liquid. So, he transfers this liquid to a kettle and close its lid. Then, he heats the kettle for some time and steam comes out. Now, he takes a metal plate with some ice on it and holds the plate just above the spout of the kettle. What will he observe?

Question 26 :
While preparing chapatis, Paheli found that the flour to be used was mixed with wheat grains. Which out of the following is the most suitable method to separate the grains from the flour?

Question 27 :
State True or False: A mixture of powdered salt and sugar can be separated by the process of winnowing.

Question 28 :
State true or false. Grain and husk can be separated with the process of decantation.

Question 29 :
A person makes a mixture of dry sand with sawdust or powdered dry leaves and keeps this mixture on a plate or a newspaper. Now, he takes the mixture to an open ground and stands on a raised platform. Next, he puts the mixture in a plate or sheet of paper and holds the plate or the sheet of paper containing the mixture, at his shoulder height while tilting it slightly, so that the mixture slides out slowly. Is there a component that blows away?

Question 30 :
Fill in the blank: The method of separating seeds of paddy from its stalks is called ___________.