Monday, November 2, 2015

sponge Bob







40X
 
 
The sponge (material NOT the living ones) is a tool used to clean the surfaces when they're dirty. They are famous for their ability of absorbing water and water based solutions.
 
 
100X
 

Sponges are made of cellulose wood fibers or plastic polymers (molecules with high molar masses). 



400X



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