Flashcards
Class 7, Chapter 3 - Fibre to Fabric | NCERT
Flashcards for quick repetition. How fibres are processed? How to make wool and silk. Science class 7 chapter 3 exercise test and solutions.
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How many types of fibres one can find on sheep's body?
Match sheep breed with its quality.
Rampur bushair
brown fleece
Bakharwal
For woollen shawls
Which sentences are true?
1. Only the fine under-hair provides fiber for making wool
2. There are breeds of sheep that provides only fine under-hair.
3. Mohair is obtained from yaks.
1. Only the fine under-hair provides fiber for making wool
2. There are breeds of sheep that provides only fine under-hair.
Put in order stages of procesing fibre to wool.
What kind of organism can cause a fatal blood disease in wool industry workers?
It is
. . . . . . . .
called
. . . . . . . .
.
It is bacterium called anthrax.
Rearing silkworms for obtaining silk is called:
What is the name of a silkworm development stage when it is covered with cocoon?
pupa
What is the most common silk moth?
tassar silk moth
mulberry silk moth
eri silk moth
mooga silk moth
Which country leads in world silk production?
Put in order silk moth lifecycle.
How long it takes for mulberry moth from hatching to spin a cocoon?
about 25 to 30 days
about 35 to 45 days
about 10 to 15 days
How silk fibres are separated from cocoons?
with mechanic process
with chemical compounds
with temperature
Which of statements are true?
1. Wool keeps warm better than silk.
2. Silkworm feed on Mulberry leaves.
3. Morus alba is a scientific name for mulberry moth.
1. Wool keeps warm better than silk.
2. Silkworm feed on Mulberry leaves.
