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rocks

its about rocks

QuestionAnswer
Rocks : Make up the earth's crust, that are made of a mixture of minerals and other materials
2. Classifying Rocks: 3 ways of classifying Texture: the look and feel of the rock's surface; 1. Grain size 2. Grain shape 3. Grain pattern 4. No visible grain
intense heat that comes from magma or lava. A. Extrusive Rocks: igneous rocks formed from lava that erupted onto Earth's surface
B. Intrusive Rocks : igneous rocks formed from magma that hardens beneath Earth's surface.
1. Porphyritic texture: large crystals surrounded by small crystals, which form when magma cools in two stages.
2. Uses of Igneous Rocks: Used because they are hard, dense, and durable Basalt: gravel Pumice: cleaning and polishing Perlite: soil mixes Obsidian: sharp tools Granite: building materials
Porphyritic texture: large crystals surrounded by small crystals, which form when magma cools in two stages.
Igneous Rocks Classified: formed from intense heat that comes from magma or lava.
Extrusive Rocks: igneous rocks formed from lava that erupted onto Earth's surface
intrusive Rocks: igneous rocks formed from magma that hardens beneath Earth's surface.
1. Igneous Rocks Classified: formed from intense heat that comes from magma or lava.
2. Uses of Igneous Rocks: Used because they are hard, dense, and durable Basalt: gravel Pumice: cleaning and polishing Perlite: soil mixes
Extrusive Rocks igneous rocks formed from lava that erupted onto Earth's surface
B. Intrusive Rocks: igneous rocks formed from magma that hardens beneath Earth's surface.
C. Texture: depends upon the size and shape of the crystals
1. Porphyritic texture: large crystals surrounded by small crystals, which form when magma cools in two stages.
2. Uses of Igneous Rocks: Used because they are hard, dense, and durable
. Sedimentary Rocks Classified: formed from layers of sediment deposited by water and wind; sediment: small solid pieces of rock or living things.
2. Changing sediments to rocks: A. Erosion: wind or water carry sediments B. Deposition: when the water or wind stops carrying the sediments
D. Cementation: when dissolved minerals and sediment glue together.
A. Clastic Rocks: formed sedimentary rocks are squeezed together
C. Compaction: presses sediments together 1. Examples: shale, sandstone, conglomerate, and breccia
B. Organic Rocks: formed when layers of plants and animals are deposited in thick layers
Chemical Rocks: when minerals are dissolved in a solution crystallize
Uses of Sedimentary Rocks: A. Limestone and sandstone: building materials B. Coal: fossil fuel
1. Metamorphic Rocks Classified: formed from heat and pressure deep beneath the earth's surface change sedimentary and igneous rocks into metamorphic
A. Grains: the arrangement of the grains 1. Foliated: grains arranged in parallel layers or bands 2. Non-foliated: mineral grains are arranged randomly
Uses of Metamorphic Rocks: A. Marble: building materials B. Slate: flooring, roofing, chalkboards
Changed Rocks: A. Limestone to marble B. Sandstone to quartzite C. Shale to slate D. Granite to gneiss
The Rock Cycle: Forces inside the Earth and at the surface of the Earth produce a rock cycle that builds, destroys, and changes the rocks in the crust.
Plate Tectonics: 2 types colliding and subducting
B. Colliding Continental Plates: Plate movement that causes folds, faulting, and uplifting of the crust that move rocks through the rock cycle.
A. Sub-ducting Oceanic Plates: Plate movements (downward) drive the rock cycle by pushing rocks back into the mantle, where they melt and become magma again.
rock types igneous, sedimentary, and metamorphic
Created by: user-2006766
 

 



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