Question 1 :
Read the story 'WISE FARMER' and choose the correct option to complete the story.
She grounded the wheat grains and __________ the flour.
Question 2 :
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 3 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c6edf59b460d7261e658.jpg' />
How does the farmer separate grain seeds from those bundles of stalks in the given above figure?
Question 5 :
State true or false. A mixture of milk and water can be separated by filtration.
Question 6 :
A person takes some water in a beaker and mixes salt in it until it cannot dissolve any more salt. This will give him a saturated solution of salt in water. Now,he adds a small quantity of salt to this saturated solution and heats it. What happens to the undissolved salt in the bottom of the beaker?
Question 7 :
State true or false. A mixture of wheat grains and wheat flour can be separated by sieving.
Question 8 :
State whether the following statements are TRUE or FALSE : A mixture of tea leaves and milk can be separated by decantation.
Question 9 :
A person mixes some soil to water in a glass and lets it stand for half an hour. Does some soil settle at the bottom of water?
Question 10 :
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 11 :
Salt is obtained from sea water by the process of _____
Question 12 :
How would you obtain clear water from a sample of muddy water?
Question 13 :
State whether the following statements are TRUE or FALSE : A mixture of wheat grains and rice flakes can be separated by winnowing.
Question 15 :
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 18 :
Why do we need to separate different components of a mixture?
Question 19 :
Fill in the blanks with appropriate words: __________ are obtained from stalks by threshing.
Question 20 :
Which method of separating tea leaves from prepared tea is better, decantation or filtration?