Science Std -7 L No - 3

Front 1

Cocoon

Back 1

the fibre cover spun

by the silk larva

around its body on

change to pupa stage

Front 2

Fleece

Back 2

the hair on the skin

of sheep ,yak,etc,

from which wool

can be changed

Front 3

Reeling

Back 3

unwinding of the

silk fibre from the

silk cocoon on a reel

Front 4

Scouring

Back 4

the process of

removing Yolk &

Suint from the raw

wool with the help

of soap or detergent

Front 5

Sericulture

Back 5

the science of raising

silk worms so as to

obtain silk cocoons

Front 6

Shearing

Back 6

the process of

removing fleece

from the sheep

Front 7

Shoddy

Back 7

the fabrics made from

the used wool by

carding, spinning

& weaving

Front 8

Silk moth

Back 8

a moth whose larva

spins silk fibres to

form a cocoon.

Front 9

Silkworm

Back 9

a caterpillar, which

hatches eg from the

eggs of the silk moth

Front 10

Sorting

Back 10

the process of

separating wool &

hair from the fleece

Front 11

Silk

Back 11

a natural protein fibre

having a triangular

prism - like structure,

spun by the mulberry

silk larva around it's

body,while changing

into pupa stage

Front 12

Suint

Back 12

dried perspiration

of sheep found in

the raw wool

Front 13

Throwing

Back 13

the process of

twisting one Or more

silk threads to make

sufficiently strong silk

strand, fit for weaving

& knitting.

Front 14

Web

Back 14

a thin film of emerging

out of the roll- era of

a carding machine

Front 15

Wool

Back 15

common name applied

to the smooth curly

fibres, obtained from

the fleece of the sheep

Front 16

Yolk

Back 16

the oily substance found

in the raw wool