Question

why is sponge is labelled as soft mater

Answer 1

Because they have spaces between them and the air is filled in those spaces, but when we crush it, the air is lost. That is the reason why its called soft matter because it is not as rigid as the properties of other solids.

Answer 2

Sponges are commonly made from cellulose wood fibers or foamed plastic polymers. Some natural sponges are still sold, with most now used either as body or facial sponges (bath sponges) or as tools for sponge painting. Bath sponges help cleanse the skin by scraping away the dead skin and washing away dirt.[2]
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