Answer:
I am the red tongue of the earth, that buries cities.
I am the greatest teacher out of them all, but alas in the end I kill my pupils.
I have two hands but cannot clap
It's equally comfortable in an orchestra and a geometry textbook. What is it?
I'm full of holes, yet I'm full of water.
I go in hard come out soft. Blow me hard and I’ll make a pop.