2006-11-27 12:06:17 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
Any rock will sink if its density is greater than the liquid you are putting it in to. Likewise, it will float if its density is less than that of the liquid.
So, lava will usually float because it is filled with bubbles of air which makes the whole rock less dense than water. If you crush a piece of lava, the pices will probably sink.
2006-11-27 12:08:42 · answer #1 · answered by hcbiochem 7 · 0⤊ 0⤋
Some rocks have a lighter mass and are more pourous. Some are lighter than the density of water. I think pumice is.
2006-11-27 20:09:17 · answer #2 · answered by sparkzxx 4 · 0⤊ 0⤋
I've never seen a floating rock.
2006-11-27 20:08:09 · answer #3 · answered by desolationangel 3 · 0⤊ 0⤋
hmmm.... maybe some are more porous and thus lighter than water
2006-11-27 20:07:57 · answer #4 · answered by Che 2 · 0⤊ 0⤋