Porous lava rock is called pumice. If placed in water, it would float as it possesses a density that is less than water.
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.
With out knowing further knowledge about the rock it is unable to determine the exact density. However, since the rock floats, presumably in water, the density must be less then 1.00g/L.
Pumice is a type of rock that can float on water due to its high porosity and low density. It is formed from volcanic eruptions and is commonly found near volcanic regions.
Scoria and pumice are both volcanic rocks with gas bubbles trapped in their matrix, giving them a similar porous texture. However, scoria is denser than pumice due to its higher iron and magnesium content, which makes it sink in water whereas pumice, being less dense, floats.
Pumice is full of holes called vesicles formed from gasses escaping the molten rock. The holes greatly reduce its density.
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 a lightweight volcanic rock that floats on water due to its high porosity.
Pumice
Pumice floats on water. It is because it is made out of lava which had bubbles left inside it. The bubbles has air trapped in it. These bubbles allow pumice to float on water.
Pumice is a type of stone that floats on water due to its high porosity and low density.
pumice stone
Pumice, a volcanic stone with tiny air bubbles, is the only stone that floats in water.Pumice.Pumice, a volcanic porous stone, is lighter than water of equal volume because of all of the air bubbles in it, so it floats.
Pumice stone floats on water.
Pumice floats in water because it has a low density. This is due to the presence of gas bubbles trapped in its porous structure during its formation. The buoyant force acting on the pumice is greater than its weight, allowing it to float on the water's surface.
Pumice is a porous rock and slat is not. Pumice floats in water because of the air pockets in the rock. Slate is a layer of rock that is tightly packed, or is very "dense".
Very porous rocks such as pumice can be very light and have the potential to float on water. Pumice is a volcanic rock.
Pumice is the only rock that floats because it has a low density due to the many air pockets trapped within its structure. These air pockets are formed during the cooling of volcanic lava, creating a porous material that is less dense than water. This unique property allows pumice to float on the surface of water.