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Chapter 3 Rocks Rock Cycle Poster due NOW!!! Make sure your name is on it and pass them forward…

Chapter 3 Rocks Rock Cycle Poster due NOW!!! Make sure your name is on it and pass them forward…. Ms. Walk 2011 You will have a test on Friday of this week over Chapter 3 Rocks… write it down in your planner… Question: How was your Thanksgiving?.

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Chapter 3 Rocks Rock Cycle Poster due NOW!!! Make sure your name is on it and pass them forward…

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  1. Chapter 3 RocksRock Cycle Poster due NOW!!! Make sure your name is on it and pass them forward… Ms. Walk 2011 You will have a test on Friday of this week over Chapter 3 Rocks… write it down in your planner… Question: How was your Thanksgiving?

  2. Rock cycle – the continuous changing of rocks from one kind to another over a long period of time

  3. Rocks • Igneous Rock – form when melted rock from inside Earth cools. a)Extrusive igneous – melted rock cools on the Earth’s surface. Small crystal sizes Ex. Basalt b)Intrusive Igneous - Melted rock that cools below Earth’s surface. Larger crystal sizes Ex. Granite

  4. Classifying igneous rocks Crystal size - fine grained crystals - coarse grained crystals - porphyritic (large and small crystals) 2. Mineral composition - light colored - dark colored

  5. Metamorphic Rocks – New rocks that form when existing rocks are heated or squeezed. (Metamorphic means to change form)Granite to gneissTwo types: Look in book on page 100-101 for more information on these-1. Foliated gneiss 2. Nonfoliated marble

  6. Sedimentary Rocks – Pieces of broken rock, shells, mineral grains, and other materials that collects in layers to form rock.

  7. Detrital sedimentary rock – fragments of weathered rocks compacted and cemented together. Conglomerate, sandstone, siltstone, and shale are forms of detrital rock. From coarse pebbles to fine clays. Classified based on sediment size that forms the rock. Chemical sedimentary rocks – formed when dissolved mineral come out of solution. Calcium carbonate is carried in solution in ocean water When calcium carbonate comes out of solution as calcite and many crystals grow together forms limestone.

  8. Organic sedimentary rocks – rocks made of the remains of once-living things. Chalk is an organic rock made of microscopic shells. Fossils are the major makeup organic rock.

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