Question

a) In the mixture of sand and water ,sand is called ___________

a) Decant b)sediment c) filtrate

b) Mud can be separated from water by __________

a) Evaporation b) Filtration c) Decantation

c) Mixture of mustard oil and water can be separated by_________

a) Sublimation b) Separating funnel c) Filtration

d) The gas insoluble in water is__________

a) Oxygen b) Nitrogen c) Carbon dioxide

e) Which one of the following is not a natural fibre?

a) Silk b) Wool c) Terylene

Q2. FILL IN THE BLANKS 5x1=5

a) We should drink __________ litres of water every day.

b) _______ Device was used by Mahatma Gandhi for making thread.

c) Jewellery is made of ___________.

d) The process of changing vapors into liquid is called __________.

e) Vinegar is _________ in water.

Q3. MATCH THE FOLLOWING 5x1=5

a) Ginning 1)Silk

b) Plant fibre 2) Converting yarn into cloth

c) Weaving 3) Making yarn from fibres

d) Animal fibre 4) Separation of cotton fibres from seeds

e) Spinning 5) Cotton​

Answer 1

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MCQs

1. b) Sediment

2. b) Filtration

3. b) Separating funnel

4. c) Carbon dioxide

5. c) Terylene

Fill in the blanks

1. We should drink 8 litres of water every day.

2. Spinning wheel was used by Mahatma Gandhi for making thread.

3. Jewellery is made of metals.

4. The process of changing vapors into liquid is called condensation.

5. Vinegar is soluble in water.

Match the following

a) Ginning - 4) Separation of cotton fibres from seeds

b) Plant fibre - 5) Cotton

c) Weaving - 2) Converting yarn into cloth

d) Animal fibre - 1)Silk

e) Spinning - 3) Making yarn from fibres

Answer 2

Following are the correct option to the above question -

(i) Sediment - in the mixture of sand and water, the sand settles to the bottom of the liquid, and it does not dissolve. The matter that settles as sediment is sand.

(ii) Filtration - It is the process of separating the suspended solid matter from a liquid. In a mixture of mud and water, mud can be separated from water by filtration.

(iii) Separating funnel - Since mustard oil and water are two immiscible liquids, therefore, they can be separated by separating funnel. Oil forms the upper layer wiles water settles down.

(iv) Nitrogen - Since nitrogen gas is nonpolar, and water is a polar solvent, therefore nitrogen is not soluble in water.

(v) Terylene - silk, wool are obtained from natural resources. Terylene is a synthetic product obtained from a process of polymerizing ethylene glycol and terephthalic acid.

Question 2

(a) 2 litres - We should drink at least 2 litres of water every day to keep our bodies hydrated.

(b) Folding Portable spinning wheel - Mahatma Gandhi used this device to make the thread. It is also known as a charkha

(c) Amber, precious metal, and shells - Jewellery is made up of various gemstones and similar materials such as amber, charcoal, and other precious metals.

(d) Condensation - It is a process of changing water vapour, which is a gaseous state into the water, which is in a liquid state.

(e) Soluble - Vinegar is hydrophilic in nature, so water gets dissolved in water, and hence are soluble.

Question 3

(a) - (4)

Ginning - the separating of cotton fibres from seeds

(b) - (5)

Plant fibre - cotton

(c) - (2)

Weaving - Converting yarn into cloth.

(d) - (1)

Animal fibre - Silk

(e) - (3)

Spinning - Making yarn from fibre