How minerals form into rocks? it's for my project!! and it's tomorrow...?
148793
rock refers to solid mineral deposits. Rocks are minerals, but not all minerals are rocks.\nSome minerals, given time and circumstance, form solid deposits. These solid mineral deposits are known as rock. Pressure, temperature, erosion, and friction are forces that effect the formation of rocks. The rock formation process allows geologists to classify rocks into three groups: sedimentary, igneous, and metamorphic. Sedimentary rock forms when layers of "sediment" (small particles of solid minerals like sand and pebbles) fuse together over time under the force of water or wind. Sedimentary rock is commonly found in and near riverbeds and streambeds. Igneous ("fire-formed") rock forms after minerals are heated to extremely high temperatures and then allowed to cool.
322954
Try Wikipedia:\n\nhttp://en.wikipedia.org/wiki/Minerals
859170
Sure...you basically answered your own question.  But for a bit more detail:\nMost minerals have a range of temperatures and pressures at which they can occur.  The very presence of a specific mineral may  therefor constrain the temp and pressure of the rock at the time the mineral formed.  \nNot all minerals have such limited ranges, or occur in significant quantities to be of any use in the field... but those that occur in quantities that can be recognized in the field, and which have a limited p-T regime can be very useful in determining the metamorphic grade in the field.
70332
Many rocks are a composite mixture of two or more minerals, each with its own melting and freezing temperatures.  If the rock was molten at some time in the past, it may have slowly cooled allowing the minerals to grow into separate crystals with time.  The mineral with the highest melting temperature would be first to solidify during cooling followed by the next and lastly by the mineral with the lowest melting point.\n\nLet's imagine we could make an artificial "rock" using glass marbles (high melting temperature), sugar (intermediate melting temperature) and butter (lowest temperature).  As we slowly cooled the mix, the marbles that never melted would remain then the sugar would turn from taffy to rock candy and lastly the butter would fill in all the cracks and "glue" everything together.\n\nIf our rock remained cold it would remain hard.  But if we raised the temperature to near the melting point of butter, the entire rock would "melt" and fall apart when hot; even though the sugar might only turn back to taffy while the marbles remained relatively hard.  The results would depend of course on the minerals contained in a particular rock sample and perhaps how it formed.
251089
I can't remember the mineral, it is there in my small little brain but I can't find it at the moment. Any way, the mineral is mixed with corn starch and formed into sticks under pressure. The corn starch prevents the powdering that causes chalk dust, but is still soft enough to allow the chalk to write on slate, etc.
132381
To see pictures of minerals go here:\nhttp://www.mindat.org/\nAnother nice one for mineral pictures is:\nhttp://un2sg4.unige.ch/athena/mineral/images/minpic_frame0.html\n\nA good site that has rock photos grouped by igneous- metamorphic-sedimentary is here:\nhttp://volcano.und.nodak.edu/vwdocs/vwlessons/lessons/Slideshow/Slideindex.html\nYuprocks has the rocks and minerals mixed on one page:\nhttp://www.yuprocks.com/mineral_pictures.shtml
458863
You could start here:\n\nhttp://webmineral.com/data/Magadiite.shtml
168408
Sand is only one form of silica and is mostly quartz, a hard to dissolve or wear away particle.  That is why sand fills an entire beach after rocks are broken down and through erosion.  However, if the sand is hot enough (near a volcano?) it may fuse into igneous rock (where igneous means fire as in the ignition that fires up a car).  Igneous rock is hard like iron but brittle rather than ductile.  Or the sand can be heated even higher to fuse into glass which is very hard but brittle and easier to crack.  On the other hand, sand at the bottom of a body of water (lake or ocean) can become cemented together perhaps with lime to become sandstone which is a sedimentary rock (made from sediment!).  I'd guess that if you filled a pot of molten lead with iron fillings you could make "sedimentary iron" or if you just fused the iron filings you could make "igneous iron" too.  Iron easily combines in nature with oxygen (rust) to form iron ores otherwise it might behave just like sand.  Hope that helps a little.
215473
Metamorphic Rock (from metamorphosis as in the change into...)\n\n10 points PLEASE!
798171
1) Rhyolites that cool too quickly to grow crystals form a natural glass or vitrophyre, also called obsidian\n\n2) amount of silica di-oxide, texture and color\n\n3) gold is found in quartz veins around igneous intrusion via hydrothermal fluid precipitation\n\n4) If we assume a slower but constant rate of cooling, then both minerals could feasibly form well shaped crystals at the same time (phaneritic texture) .  If we assume a slow than fast cooling, then possibly only plagioclase would form (porphyritic texture) due to its position in Bowen's reaction series.
1076848
the simplest explanation is as follows:\n\n* igneous rocks are formed when molten lava is erupted on to the earth's surface and cools. i.e. basalt lavas. \n\n* sedimentary rocks are formed when other rocks (possibly igneous, metamorphic or previous sediemtnary rocks) are eroded chemically or physically and are then redeposited. i.e. sandstones and mud stones.\n\n* metamorphic rocks are formed when other rocks (igneous or sedimentary typically) are buried and then exposed to high temperatures and pressures that change the properties of that rock. i.e. marble - metamorphosed limestone.
605599
A mineral is a naturally occurring, inorganic solid with a definite chemical composition and a crystalline structure. A rock is an aggregate of one or more minerals. (A rock may also include organic remains.) Some rocks are predominantly composed of just one mineral. For example, limestone is a sedimentary rock composed almost entirely of the mineral calcite. Other rocks contain many minerals, and the specific minerals in a rock can vary widely. Some minerals, like quartz, mica or feldspar are common, while others have been found in only one or two locations worldwide. Over half of the mineral species known are so rare that they have only been found in a handful of samples, and many are known from only one or two small grains.\nthere for its hard to say which is rarest.
657093
Rocks tell the story of the Earth. The Earth is made of rock, from the tallest mountains to the floor of the deepest ocean. Thousands of different types of rocks and minerals have been found on Earth. Most rocks at the Earth's surface are formed from only eight elements (oxygen, silicon, aluminum, iron, magnesium, calcium, potassium, and sodium), but these elements are combined in a number of ways to make rocks that are very different.\nRocks are continually changing. Wind and water wear them down and carry bits of rock away; the tiny particles accumulate in a lake or ocean and harden into rock again. The oldest rock that has ever been found is more than 3.9 billion years old. The Earth itself is at least 4.5 billion years old, but rocks from the beginning of Earth's history have changed so much from their original form that they have become new kinds of rock. By studying how rocks form and change, scientists have built a solid understanding of the Earth we live on and its long history.
129822
You've been given exhaustive lists, copied directly from websites without giving proper citation I imagine. \n\nHere is how to think about this question so that you can recall and understand the answer, without just memorizing a bunch of rock names.\n\nUse the rock cycle. Igneous rocks are of two groups, those formed within the earth and those formed by volcanism.  The volcanic rocks will show signs of that volcanism and will be things like black columnar basalt found in massive flows. Obsidian (volcanic glass) that flowed as liquid, scoria and pumice which are like foam because the dissolved gases expanded and made them bubble as they hardened. The other igneous group formed under the earth's surface, and includes things like granite where you can see the crystals that formed as it cooled and solidified. \n\nSedimentary rocks are also in two major informal groups (and a minor third). The first group of sedimentary rocks is clastics. These are formed by weathering, transport and deposition. Weatherings breaks down rocks like igneous, metamorphic and even sedimentary rocks and transport by wind, water, or gravity deposits these rocks as accumulations of clasts, (thus clastics). They become sandstone, shale, and conglomerate. The other major sedimentary group is carbonates. These rocks are 'born' because they are formed by living things. Ocean environments (and lakes too) have many organisms that make shells, corals that make reefs, and algae that make fine carbonate sediments (known as carbonate mud). Even bacteria get into the act helping to precipitate carbonates in many ocean environments. The third group of sedimentary rocks is those that are dissolved by water and deposited by evaporation or precipitation. These include gypsum, halite, sylvite, and many more. \n\nMetamorphic rocks all start life as one of the previous groups. You can metamorphose a granite into a granitic gneiss by burial, pressure and heat. You can metamorphose a basalt into an amphibolite. You can make limestone into marble. Sandstone turns into quartzite.\n\nRemember the rock cycle, associate the rocks as they move through it, and you won't have trouble remembering examples of rock types. Also don’t get tripped up by the difference between a mineral and a rock. Geologists sometimes use the two terms identically, but there is a formal difference between a rock (which is an impure mixture) and a mineral that is chemically consistent.
174475
mix it...let NaCl dissolve in water...then let the mmixture evaporate or perhaps bring the mixture into a boil 'til you can see the formation of crystals...   try it... i've encountered such experiment in my chemistry class... im not quite certain of the procedures though...it's two years ago...cant remember it well...^_^
845859
what are the properties of minerals?\n...\nsorry thats all i got
260543
Rocks don't grow, but crystals do.  However, crystals only grow when they are imersed in the medium that contains its essential elements. You should measure it over time. It would be more accurate and convincing than just by looking at it.