Class 7 Science Question Answers - Fibre to Fabric

Very Short Q & A  :

Q1: Wool is obtained from __________________ of sheep or yak.

Ans : Fleece

Q2: Silk fibres are obtained from cocoons of _________________.

Ans : Silk moth

Cocoons of silkworm 

Q3: Name some animals which provide us with wool.

Ans : Sheep, goat yak etc.

Q4: Yak wool is common in

a. Tibet

b. Ladakh

c. Both a and b

d. None of these.

Ans :  Both a and b.

Q5: Name the place where Angora goats are found in plenty.

Ans :  Hilly region like Jammu and Kashmir.

Q6: Name some Indian breed of sheep.

Ans :  Lohi, Rampur, bushair, Nali, Bakharwal , Marwari and Patanwadi

Q7: Kashmiri goat's under fur is woven to form fine shawls called __________________.

Ans :  Pashmina shawls

Q8: The fur on the body of camel is also used as wool .True/False.

Ans :  True

Q9: Which parts of the black sheep have wool?

Ans : The hairy skin called fleece have wool in black sheep 

Q10: Name the protein which is the chief component of wool fibres.

Ans :  Keratin is the chief component of wool fibres

Q11: Name the process involved in getting fibres form the sheep.

Ans :  The sheep's hair are Sheared off from its body, scoured, sorted, dried, dyed, spun and woven to yield wool.

Q12: Define sericulture.

Ans :  The rearing breeding and management of silkworms for obtaining silk is called sericulture.

Q13: Caterpillars should be collected from bare hand or not?

Ans :   No

Q14: Name the country which is the largest producer of silk.

Ans :  China

Q15: Silk is a good conductor of heat or poor conductor of heat?

Ans :  Poor

Q16: What is yarn?

Ans :  Yarn is a long continuous thread that is made up of fibre.

Q17: ______________is a dried perspiration found in raw wool.

Ans :  Suint

Q18: What is ginning?

Ans :  The process of removing seed from cotton called ginning.

Q19: Spinning is a process of making fibers. True/False.

Ans :  False

Q20: Weaving yarn makes a piece of fabric. True/False

Ans :  True

Q21: Polyester is a natural fibre. True/False.

Ans : False

Q22: Name a strongest variety of silk.

Ans :  Mooga

Q23: Define weaving.

Ans :  Weaving is the process of arranging two sets of yarns together to make a fabric.

Q24: Define spinning.

Ans :  The process of making yarn from fibres is called spinning.

Q25: Name the most common silk moth.

Ans :  Mulberry silk moth.

Q26: Name some varieties of silk.

Ans :  Mulberry silk, tassar silk, eri silk, Mooga silk etc.

Q27: ______________ weaves silk threads into silk cloth.

Ans : Weaver

Q28: What do you mean by cocoon?

Ans : Caterpillar in its later stage of development completely covers itself by silk fibres and turns into pupa. This covering is known as cocoon.

Q29: Name two animals of South America that yields wool.

Ans : Llama and Alpaca.

Q30: Which of the following does not yield wool?

a. Yak

b. Camel

c. Woolly dog

d. Goat

Ans : Woolly dog