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Rocks Made of minerals and other materials
Classifying Rocks <ul><li>Mineral composition </li></ul><ul><li>Color </li></ul><ul><li>Texture </li></ul><ul><ul><li>Grai...
Igneous Rocks <ul><li>Formed from magma or lava </li></ul><ul><li>Granite, obsidian, pumice, basalt </li></ul><ul><li>Used...
Extrusive – formed when lava hardens on Earth’s surface ( exit ), fine grains, small crystals  Intrusive – formed when mag...
Sedimentary Rocks <ul><li>Formed by pressure on layers over time </li></ul><ul><li>Limestone, shale, coal, sandstone congl...
<ul><li>Erosion – wearing down of rock by wind and water </li></ul><ul><li>Deposition – the process by which sediments set...
Three Types of Sedimentary Rocks <ul><li>Clastic Rocks – a rock formed when rock particles are squeezed together </li></ul...
Metamorphic Rocks <ul><li>Formed from other rocks by heat and pressure </li></ul><ul><li>Gneiss, quartzite, slate </li></u...
 
Foliated rocks have grains which are arranged in parallel layers or bands Non-foliated rocks have grains that are in a ran...
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Rocks

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PowerPoint for 6th grade earth science.

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Transcript of "Rocks"

  1. 1. Rocks Made of minerals and other materials
  2. 2. Classifying Rocks <ul><li>Mineral composition </li></ul><ul><li>Color </li></ul><ul><li>Texture </li></ul><ul><ul><li>Grain Size </li></ul></ul><ul><ul><li>Grain Shape </li></ul></ul><ul><ul><li>Grain pattern </li></ul></ul>
  3. 3. Igneous Rocks <ul><li>Formed from magma or lava </li></ul><ul><li>Granite, obsidian, pumice, basalt </li></ul><ul><li>Used in building materials and tools </li></ul>obsidian pumice
  4. 4. Extrusive – formed when lava hardens on Earth’s surface ( exit ), fine grains, small crystals Intrusive – formed when magma inside the Earth hardens, coarse grains, large crystals
  5. 5. Sedimentary Rocks <ul><li>Formed by pressure on layers over time </li></ul><ul><li>Limestone, shale, coal, sandstone conglomerate, </li></ul><ul><li>Building materials, cement, arrowheads </li></ul>Erosion Deposition Compaction Cementation
  6. 6. <ul><li>Erosion – wearing down of rock by wind and water </li></ul><ul><li>Deposition – the process by which sediments settle out of the fluid carrying it </li></ul><ul><li>Compaction - the process that presses sediments together </li></ul><ul><li>Cementation – the process in which dissolved minerals crystallize and glue particles together </li></ul>
  7. 7. Three Types of Sedimentary Rocks <ul><li>Clastic Rocks – a rock formed when rock particles are squeezed together </li></ul><ul><li>Organic Rocks – a rock formed when the remains of plants and animals are deposited in thick layers </li></ul><ul><li>Chemical Rocks – formed when minerals that are dissolved in solutions crystallize </li></ul>
  8. 8. Metamorphic Rocks <ul><li>Formed from other rocks by heat and pressure </li></ul><ul><li>Gneiss, quartzite, slate </li></ul><ul><li>Used in buildings and sculpture </li></ul>
  9. 10. Foliated rocks have grains which are arranged in parallel layers or bands Non-foliated rocks have grains that are in a random arrangement
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