Page 28 - Science Class 07
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v Silk fabrics can also be used for decora ons called staples. This natural crimp (wave) gives
and occasionally used as a high-end wall wool its elas city (springiness).
covering. Shearers remove the wool from sheep’s body
using specially-designed handpieces which are
like the hair clippers, hairdressers used to cut
our hair. This is called shearing. Sheep can be
shorn each year and their wool keeps growing
back, just like our hair grows between haircuts.
A er shearing, wool is processed and made
into lots of products we use everyday, like
tex les, clothing and furnishings.
A Shop of Silken Cloth However, sheep is the most important source
of wool fibre. The sheep was probably
domes cated in Central Asia. When European
Varanasi is worldwide famous for special colonists se led in America, Southern Africa,
type of silk sarees with beau ful embroidery Australia and New Zealand, they introduced
and metal work. sheep farming.
1. Where is silk obtained from?
2. Which country did first develop silk?
3. What is a cocoon?
4. What is the main difference between
Shearing
Tussar silk and Muga silk?
Varieties of Wool
5. Write any two uses of silk other than
making dress materials. v Crossbreed sheep and many of the breeds
which originate in Britain, yield medium
WOOL quality wools.
Wool is a natural fibre produced by sheep. v Carpet wools are coarser, thicker and more
Sheep grows wool on their bodies in the same variable in quality than either merino or
way people grow hair. As wool grows out from crossbreed wools. They are derived from
the sheep’s skin, it forms groups of wavy fibres more marginal sheep rearing areas or from
areas where wool is only an incidental by
product from sheep kept for west India, Iran
and Ethiopic produce such type of wool.
v One of the finest quali es of wool is also
obtained from Angora goat. These goats
are found in Asia minor and South Africa.
Wool
28 Science-7
