Because it is full of holes and air spaces. This is because it forms while bubbles of gas are trapped in quick-cooling lava.
pumice stone
Pumice is a type of stone that floats on water due to its high porosity and low density.
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.
Some minerals that can float in water include pumice, zeolite, and perlite due to their low density. These minerals have air pockets or low specific gravity, allowing them to float on the surface of water.
The only rock that floats in water is pumice. Pumice is formed from volcanic eruptions and has a lot of air bubbles trapped within its structure, which reduces its density and allows it to float on water.
Pumice is an extrusive igneous rock with a density less than that of water.
Pumice stones will, these are low density rocks formed by volcanoes
pumice stone
Pumice is a type of stone that floats on water due to its high porosity and low density.
Pumice is a type of volcanic rock that is lighter than water. This is due to the presence of air bubbles trapped within the rock's structure, giving it a low density that allows it to float on water.
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.
One example of a mineral with low specific gravity is pumice. Pumice is a volcanic rock formed from frothy lava with numerous gas bubbles trapped within its structure, resulting in a low density and specific gravity.
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.
Pumice, being mostly composed of air bubbles, is surprisingly light for a rock. So light, in fact, that it can float 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.
The density of pumice rock can vary, but on average it is around 0.25-0.55 g/cm^3. To find the density of 1.3kg of pumice rock, you would need to know the volume of the pumice rock. By dividing the mass (1.3kg) by the volume, you can calculate the density.
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