CBSE Class 6 Answered

 Silk is obtained from silkworms.  

 They are reared and fed mulberry leaves.  

 After nearly 40 days, the silkworms are ready to spin their cocoons.

 They make their cocoons in one continuous thread.  

 A single worm can spin a continuous thread of up to 800 metre long.  

 This process takes about 8 days. After this, the cocoons (with the silkworm inside them) are put in boiling water.  

 Each cocoon is unwound to get the silk fibre.

 The fibres are then joined together to make thread.  

 Thread is then wound into a reel.  

 This is raw silk.

 About 5,500 silkworms are required to produce 1 kg of raw silk.