Class 7 Science
Fibre to Fabric
Question 1: You must be familiar with the following nursery rhymes
a. ‘Baa baa black sheep have you any wool’.
b. ‘Mary had a little lamb. whose fleece was white as snow’.
Answer the following question.
(a) Which parts of the black sheep have wool?
Answer: The skin of black sheep has wool.
(b) What is meant by the fleece of the lamb?
Answer: Fleece means hair of the lamb.
Question 2: The silkworm is (a) caterpillar (b) a larva; choose the correct option.
(i) a (ii) b (iii) both ‘a’ and ‘b’ (iv) neither ‘a’ nor ‘b’
Answer: (b) both 'a' and 'b'
Question 3: Which of the following does not yield wool?
(d) Woolly dog
Answer: (d) Woolly dog
Question 4: What is meant by the following terms?
(a) Rearing: Taking care of animals including feeding, grazing, breeding, etc. for meat, and other useful products.
(b) Shearing: The removal of wool from the sheep is called shearing.
(c) Sericulture - The rearing of silkworm for obtaining silk is known as sericulture.
Questions 5: Give below is sequence of steps in the processing of wool. Which are the missing steps? Add them.
Shearing _________ Sorting _________ _______________.
Answer: Shearing Scouring Sorting Colouring Spinning
Question 6: Make sketches of the two stages in the life history of the silk moth which are directly related to the production of silk.
Question7: Out of the following which are the two terms related to silk production?
d. Apiculture and
Answer: (a) Sericulture and (b) Moriculture are related to silk production.
Question 8: Match the following
|Column I||Column II|
|(1) Scouring||(a) Yields silk fibres|
|(2) Mulberry leaves||(b) Wool yielding animal|
|(3) Yak||(c) Food of silkworm|
|(4) Cocoon||(d) Reeling|
|(e) Cleaning sheared skin|
Answer: 1 – (e), 2 – (c), 3 – (b), 4 – (a)