Question

Critical Thinking Questions -
a) What type of rock is Pumice? Why is it a porous rock?
b) Some foot scrubbers that are made from pumice can float on water. Explain why.

Answer 1

Answer:

Pumice is a very light, porous volcanic rock that forms during explosive eruptions. During the eruption, volcanic gases dissolved in the liquid portion of verz viscous magma expand very rapidly to create a foam or froth; the liquid part of the froth then quickly solidifies to glass around the gas bubbles.