Download Fibre to Fabric - Chapter 3 of Class 7 Science NCERT Book (PDF) ... ⇒ Silkworms are caterpillars of silk moths. ⇒ During their life cycle, the worms spin cocoons of silk fibres.

Polyphemus moths overwinter in their silken cocoons, the adult moths emerging in late spring and early summer. Adults don’t eat, they don’t have mouths (which is weird to think about).

Spinning of cocoon, hardening of the outer layer, a silk moth laying egg, and then a pupa crawling out --The chapter on the life-cycle of silk moth couldn't have been more interesting for students ...