It's a rock.
Pumice is a natural material from a volcano, so you can't make it at home. You can buy pumice as a brick in a hardware store.
Pumice is a volcanic rock that is so full of gas bubbles that is it very light, and rough surfaced.
pumice
The lightest rock in the world is pumice. Pumice is a type of volcanic rock that is formed when lava with high water and gas content is rapidly cooled. It is so light that it can float on water.
Pumice ^^This answer helped me with my 13 pages of science homework.
Pumice is an example of this
A pumice stone is a volcano output that is so full of air bubbles and so light that it floats on water.
Pumice, being mostly composed of air bubbles, is surprisingly light for a rock. So light, in fact, that it can float on water.
Pumice is an extrusive igneous rock that has a lower density than an equal volume of water. Pumice forms from an airborne, rapidly cooled frothy magma, full of tiny gas pockets, making it extremely light in weight.
Pumice
Pumice rock.
pumiceThe type of igneous rock that floats is called Pumice. It isn't lighter than other rocks, just less dense because it has lots of very small air bubbles trapped in it. You can see these if you look at the exterior of the rock.