The on rock that floats is a pumice. It is a kind of volcanic glass. The reason it floats is because it has big pours all over it. I'm only in 8th grade and I still know the answer.
Pumice is a lightweight volcanic rock that floats on water due to its high porosity.
Pumice
Crust
Floating rocks: pumice. Non-floating rocks: all but pumice. Pumice can float on water because its density is so low, due to trapped bubbles of air which formed during its solidification from lava.
Pumice is such a rock.
Sounds like pumice.
pumice
Very porous rocks such as pumice can be very light and have the potential to float on water. Pumice is a volcanic rock.
Its porous, full of tiny holes and it floats.
Pumis
The rock comes from a volcano and is known as pumice.
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.