Classifying rocks by Fernanda Arias https://padlet.com/marias8/zzfl0tfzb3a9 P. Ferrari J. Bolaños J. Alvarez F. Arias en-us 2017-10-24 15:33:44 UTC 2017-10-31 15:33:24 UTC hello@padlet.com Texture jbolanos3 https://padlet.com/marias8/zzfl0tfzb3a9/wish/200049429 Most rocks are made up of particles of minerals or other rocks, which geologists call grains]]> 2017-10-24 15:35:33 UTC https://padlet.com/marias8/zzfl0tfzb3a9/wish/200049429 How do Geologists Classify Rocks? pferrari1 https://padlet.com/marias8/zzfl0tfzb3a9/wish/200050587 To study a rock sample, geologists observe the rock's minerals composition,color, and texture. ]]> 2017-10-24 15:37:29 UTC https://padlet.com/marias8/zzfl0tfzb3a9/wish/200050587 Grain Size jbolanos3 https://padlet.com/marias8/zzfl0tfzb3a9/wish/200050772 Fine-grained rocks's grains are so small that they can be seen only wih a microscope. Rocks with grains that are easy to se are said to be coarse grained.]]> 2017-10-24 15:37:47 UTC https://padlet.com/marias8/zzfl0tfzb3a9/wish/200050772 Origin marias8 https://padlet.com/marias8/zzfl0tfzb3a9/wish/200051732  
Geologists have discovered that they can classify a rock according to their origin. 
]]> 2017-10-24 15:39:16 UTC https://padlet.com/marias8/zzfl0tfzb3a9/wish/200051732 Grain Shape jbolanos3 https://padlet.com/marias8/zzfl0tfzb3a9/wish/200052930 Some rock's grain shape result from the shape of the mineral crystal that form the rock. Other grain shapes results from rounded or jagged bits of several rocks.]]> 2017-10-24 15:41:20 UTC https://padlet.com/marias8/zzfl0tfzb3a9/wish/200052930 marias8 https://padlet.com/marias8/zzfl0tfzb3a9/wish/200053920 Geologists have classified rocks into 3 mayor groups.]]> 2017-10-24 15:42:59 UTC https://padlet.com/marias8/zzfl0tfzb3a9/wish/200053920 Mineral Composition and Color pferrari1 https://padlet.com/marias8/zzfl0tfzb3a9/wish/200054482 Rocks are made of mixtures of minerals and other materials. Some rocks contain only a single mineral. About 20 minerals make up most of the rocks of Earth's crust. These are called ROCK-FORMING MINERALS. 
A rock's color provides clues to the rock's mineral composition. GRANITE isn generally a light-colored rock that has high silica content. BASALT is a dark-colored that has a lower silica content than granite has. ]]> 2017-10-24 15:43:55 UTC https://padlet.com/marias8/zzfl0tfzb3a9/wish/200054482 Igneous rock marias8 https://padlet.com/marias8/zzfl0tfzb3a9/wish/200054796 Forms from the cooling of magma or lava.]]> 2017-10-24 15:44:32 UTC https://padlet.com/marias8/zzfl0tfzb3a9/wish/200054796 Grain Pattern jbolanos3 https://padlet.com/marias8/zzfl0tfzb3a9/wish/200055044 In banded rocks, grain can: lie in a pattern of flat layers, can form swirls or colored bands. Nonbanded rocks have grains that don't lie in any vsible pattern]]> 2017-10-24 15:45:02 UTC https://padlet.com/marias8/zzfl0tfzb3a9/wish/200055044 Sedimentary rock marias8 https://padlet.com/marias8/zzfl0tfzb3a9/wish/200056933 Forms when small particleps of rocks or the remains of plants and animals are pressed and cemented together.]]> 2017-10-24 15:48:06 UTC https://padlet.com/marias8/zzfl0tfzb3a9/wish/200056933 Metamorphic rock marias8 https://padlet.com/marias8/zzfl0tfzb3a9/wish/200057036 Forms when a rock is changes by heat or pressure, or by chemical reactions.]]> 2017-10-24 15:48:16 UTC https://padlet.com/marias8/zzfl0tfzb3a9/wish/200057036