How many types of rocks are  threre???
115408
3 main types: igneous, sedimentary, and metamorphic
787241
Bowen's reaction series is what you're looking for.\n\nIn a nutshell, the rate of cooling, temperature, and magma composition determine which minerals form and the ultimate rock type.  The links provide more information.
45660
Three types of rocks: igneous (formed by volcanic activity, like obsidian and pummice), metamorphic (formed by heat and pressure, like marble and quartzite) and sedementary (formed by accumulated depositing of loose material, packed hard into a rock, like sandstone and limestone).
281360
its a rock...\n\npencils...
1011349
You know, it might be kinda fun asking questions through this format, but you will learn it better by actually doing the studying yourself. \n\nRemember that "conservation of matter" has to do with keeping stuff the same. The rock cycle is very broad and covers all the rock processes, both contact and regional metamorphism have changes in crystal types occurring, so sedimentation has to be the best illustration of conservation of matter. \n\nBut go back to your notes and your text and then rewrite the information in your own words to make it stick in your head.
172643
Check this out: http://en.wikipedia.org/wiki/Moon_rocks
974922
rocks : see http://en.wikipedia.org/wiki/Rocks\nlakes : see http://en.wikipedia.org/wiki/Lakes
815356
1) sandstone, shale, conglomerate (by size of clasts)\n2) mainly carbonates (limestone, dolomite)\n3) c\n4) b\n5) Not sure... maybe b, because it can be organic or non-organic?
3614
WHICH metamorphic rocks?  It will vary depending on the "ingredient" rocks and HOW they are metamorphing (pressure, heat, both pressure and heat)
319861
a)  There are 26 black cards and out of the 26 only one is the ace of spades.\n1/26\n\nb)number of ways of picking any 6 rocks is\nC(5+7+8,6) = C(20,6) = 38760.  This will be the denominator for each part.\nnumber of ways of picking 2 silicates, one pyrite and 3 carbonates is\nC(5,2)*C(7,1)*C(8,3) = 10*7*56 = 3920\nProbability is 3920/38760 = .1011\nFor two silicates and 4 pyrites of carbonates:\nC(5,2)*C(15,4) = 10*1365 = 13650\nProbability = 13650/38760 = .3522\nFor 4 pyrites and 2 silicates or carbonates:\nC(7,4)*C(13,2) = 35*78 = 2730\n2730/38760 = .0704
1120366
1. The difference between rocks & minerals\nhttp://www.rocks-and-minerals.com/ gives a simple but good explanation of the difference between rocks & minerals.\n\nIt is not easy to tell the difference between rocks & minerals because there are so many kinds of them. It takes years of study to be able to accurately identify a mystery rock and even then rockhounds want to know where the specimen came from. \n\nRocks\nAll rocks are made of 2 or more minerals, but minerals are not made of rocks. To see some pictures of different kinds of rocks, click here.\n\nRock Words: There are many common names for rocks and the usually give you an idea of how big the rock is. Here are a few:\n boulder - large, taller than a person \n rock - large, you could get your arms around it or a bit smaller but it is usually jagged, broken off a bigger piece of rock  \n river rock - round rocks that are along the edge & at the bottom of fast-flowing rivers  \n stone - medium, you could hold it in two hands  \n pebble - small, you can hold it with two fingers, could get stuck in your shoe, usually rounded  \n sand - made up of tiny pieces of rock, grains of sand  \n grain - tiny, like a grain of rice or smaller, often found on a beach  \n dust - really fine powder that is mixed in with sand or soil  \n mountain - huge, giant hunk of rock that is still attached to the earth's crust, doesn't move, tall  \n\n\nFor an excellent Rock Identification test, click on http://www.bwctc.northants.sch.uk/html/projects/science/ks34/rocks/key.html\n\n \n\nMinerals\nA mineral is the same all the way through. That is one reason we speak of a sample or a specimen rather than a rock. There are about 3000 known minerals on earth. Al rocks are made up of 2 or more of these minerals. To find out more about different kinds of minerals, click here.
612762
A rolling stone gathers no moss - should be 'bryophitic', I think.\n\n"Nomadic fragments of igneous and metamorphic strata, having non-zero quantities of angular momentum, accumulate no forms of bryophitic plant life"
511999
Basalts (specifically MORB <mid ocean ridge basalt> types)
654586
Igneous rocks-- formed from magma, extrusive or intrusive.  extrusive have small crystal forms ex. basalt, scoria, pumice.  Intrusive large crystals forms ex. granite, gabbro\n\nSedimentary rocks -- the only rocks that contain fossils, formed at the surface, formed from fragments of other things ie. rocks, fossils, woody plants (coal), or minerals crystallizing out of water (limestone) -- Are porous found in aquifers, oil fields.\n\nMetamorphic rocks -- forms from alteration of other rock with increased pressure and/or temperature.  Always in a solid state (they don't melt)called recrystallization, form new minerals that are stable at increased temperature and/or pressure, happens below the earth's surface (at depth).
115541
A lot of them, yes! The creation of the Earth took a very long time, and during that time, many of the rocks you can see today were formed. There are three kinds of rock - \n\nIgneous - from the molten lava once it is cooled\nSedimentary - from several layers of materials compacted together\nMetamorphic - one of the above rocks that has 'morphed' into a different kind of rock
244328
no a diamond is a type of rock.\n\na crystal is a type of glass.\n\nsimilar, but not quite the same.
418501
Pumice, obsidian, and basalt are all extrusive igneous rocks.so yea basalt is extrusive