Third Planet Test 2 Study Guide - Third Planet Test 2 Study...

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Third Planet Test 2 Study Guide 1. Know the rock cycle as presented in class The rock cycle can best be described as follows: 1. magma cools and solidifies (crystallizes) forming igneous rock; 2. igneous rock weathers, become transported, and deposited as sediments; 3. sediments through cementation and compaction lithify to form sedimentary rock; 4. sedimentary rock through pressure and temperature become metamorphosed forming metamorphic rocks; 5. metamorphic rock becomes melted forming magma once again; 6. igneous rock can also be metamorphosed without becoming sediments; 7. metamorphic and sedimentary rock can be weathered, transported and deposited creating sediments. 2. Know the definition of igneous rocks Igneous rocks form from magma that cools and crystallizes at or near the surface and at depth. Two types of igneous rocks are extrusive and intrusive. 3. Know the types of igneous rocks, extrusive and intrusive Extrusive rocks form when lava, which is similar to magma, but has lost most of its gases, makes its way to the surface and solidify. Intrusive rocks form when magma not reaching the surface cools and solidifies at depth. 4. Know all the examples of igneous rocks, such as granite, diorite, etc. and the type the rock belongs to, e.g. basalt=intrusive igneous rock
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Intrusive Igneous Rocks: Granite , Diortie , Gabbro Extrusive Igneous Rocks: Obsidian , Pumice , Scoria , Rhyolite , Andesite , Basalt 5. Know all about sedimentary rocks The weathering process produces sediments, which then become lithified to form sedimentary rocks. 6. Know how sedimentary rocks are classified: detrital vs chemical Detrital sedimentary rocks are formed from material called detritus. Detritus consists of particles of weathered rock material. Chemical sedimentary rocks are formed when dissolved material are precipitated as solids. 7. Know the names of the sedimentary rocks, such as conglomerates, etc and to which group they belong to. Some examples of detrital sedimentary rocks are (these rocks are composed of various particle shapes): conglomerates are composed of rounded shape gravel, breccias are composed of angular shaped gravel, sandstones are composed of sand size particles, siltstones are composed of silt size particles, shale, mudstone, claystone are composed of clay size particles arkose is a feldspar rich sandstone or conglomerate Some examples of chemical sedimentary rocks are: limestone
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