I mean is it the heaviest per whatever measurement, like real dense?
I'd think lighter because its expanded and well, it shouldnt be lighter... ? does a red high 1 ounce steel ball weigh the same when it's red hot ?
2006-09-01 11:53:58 · 7 answers · asked by IronRhino 2 in Science & Mathematics ➔ Earth Sciences & Geology
Pumice rocks are igneous rocks which were formed when lava cooled quickly above ground. You can see where little pockets of air had been. This rock is so light, that many pumice rocks will actually float in water. Pumice is actually a kind of glass and not a mixture of minerals. Because this rock is so light, it is used quite often as a decorative landscape stone. Ground to a powder, it is used as an abrasive in polish compounds and in Lava soap.
2006-09-01 12:26:22 · answer #1 · answered by Sean 7 · 0⤊ 0⤋
Lava can range a great deal in density. Some of it is actually light enough to float; some is very heavy but not the most dense type of rock.
2006-09-01 14:59:47 · answer #2 · answered by idiot detector 6 · 1⤊ 0⤋
not heavy at all some floats ( air pockets) and any thing heated ( that expands ) is less dense due to expansion ( more volume same weight ) and the Basalt answer is correct but it refers to the material without the air pockets that form in lava that is exposed to the atmosphere during the cooling process
2006-09-01 12:01:20 · answer #3 · answered by Anonymous · 1⤊ 0⤋
Lava, that flows (usually basalt) is heavier than granite which sort of rises up through the Earth's crust like a giant, hard turd on a slow trip to the toilet pan. This is because basalt has more iron, while granite is quartz rich. Most basalt is on the sea floor, lower down on the Eath's crust. Granite is more common on continents which float on the denser basalt.
2006-09-01 12:00:28 · answer #4 · answered by Anonymous · 0⤊ 1⤋
In surfing the web for info on volcanoes, I've learned that lava has such a broad definition that there are marked differences in density of different types of lava. Wikipedia has an excellent article on it:
2006-09-01 12:32:59 · answer #5 · answered by Helmut 7 · 1⤊ 0⤋
it's not very dense at all... Think of pumice stones that you can buy for getting rid of calluses, etc. There are lots of little air pockets in the stone, and so it's very light...
I would think a one ounce ball would weigh the same regardless of its' temperature, it still has the same number of molecules with the same atomic weights...
2006-09-01 11:58:07 · answer #6 · answered by suzy7o7 2 · 1⤊ 1⤋
LIQUID rock. It's less dense. Which is why it pours down volcanoes.
2006-09-01 11:59:48 · answer #7 · answered by shmux 6 · 0⤊ 1⤋