Questions and Answers
Class 7, Chapter 3 - Fibre to Fabric | NCERT
1.
How many types of fibres one can find on sheep's body?
two
Match sheep breed with its quality.
3.
Rampur bushair
brown fleece
5.
Bakharwal
For woollen shawls
Which sentences are true?
8.
Only the fine under-hair provides fiber for making wool
True
9.
There are breeds of sheep that provides only fine under-hair.
True
10.
Mohair is obtained from yaks.
False
11.
Put in order stages of procesing fibre to wool.
ShearingScouringSortingCleaning of burrsDyeingRolling
12.
What kind of organism can cause a fatal blood disease in wool industry workers?
It is bacterium called anthrax.
13.
Rearing silkworms for obtaining silk is called:
sericulture
14.
Silk is made of:
protein
15.
What is the name of a silkworm development stage when it is covered with cocoon?
pupa
16.
What is the most common silk moth?
mulberry silk moth
17.
Which country leads in world silk production?
China
18.
Put in order silk moth lifecycle.
egglarvaepupamoth
19.
How long it takes for mulberry moth from hatching to spin a cocoon?
about 25 to 30 days
20.
How silk fibres are separated from cocoons?
with temperature
Which of statements are true?
21.
Wool keeps warm better than silk.
True
22.
Silkworm feed on Mulberry leaves.
True
23.
Morus alba is a scientific name for mulberry moth.
False