Geology

What is density of pumice?

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2009-10-06 22:54:50
2009-10-06 22:54:50

Less than 1.0, the density of water.

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Pumice has an extremely low density due to its vesicular nature. Obsidian is not characteristically vesicular like pumice and its density is greater. Therefore, in equally sized samples pumice is lighter.


Since it floats in water it has a density less than 1.00


Pumice is full of air pockets which make its overall density less than that of water.


It has more than 1.99 desity


Pumice is a porous volcanic rock with a density less than the density of water. Pumice is created when foamy textured lava is ejected from a volcano and rapidly cooled.


Pumice is full of holes called vesicles formed from gasses escaping the molten rock. The holes greatly reduce its density.


Any with a density less than the fluid into which it is placed. Pumice is a volcanic rock that will sometimes float on water.pumice


Pumice is not one rock - it is porous volanic mineral and can have vastly different ammounts of gas/holes in it, making its density highly variable. Many forms/types float in 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



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 and scoria have similar properties, like both being extrusive igneous rock with adjacent vesicles. Although pumice is less dense than scoria and its density is so low that it will float on water.


Although pumice is volcanic stone, it has air pockets inside making it less dense than water, so it floats.


It depends what kind you have... If its density is less then the water it is floating in, yes.


pumice or any other low density rock


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.



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.


They can have lots of different densities from 7.6 for Galena (a lead bearing mineral) to .9 for pumice (a type of volcanic rock). For comparison, water has a density of 1.


MOST rocks cannot- their density is greater than the density of water, so they sink. There ARE a few forms of pumice- volcanic rock- that are foamy with a lot of bubbles. Their density is so low that they CAN float.


Not all lava rock is pumice. Lava rock is a term used synonymously with pumice by some material suppliers. Actually though, any rock formed from cooling lava would be considered a 'lava' rock and would include rocks like pumice, obsidian, and basalt. Only lava has a density less than that of water, allowing it to float.


The extrusive vesicular igneous rock pumice has a density less than that of water and floats. No other igneous rock is known to have a density less than that of water.



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