Chapter 4 rocks

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Chapter 4 rocks

  1. 1. Chapter 4 Rocks
  2. 2. <ul><li>Rocks and Minerals are both solids. </li></ul>
  3. 3. <ul><li>Rocks and minerals are both natural </li></ul><ul><ul><li>They are not man made </li></ul></ul>
  4. 4. <ul><li>Rocks and minerals both make up soil. </li></ul>
  5. 5. <ul><li>Minerals are made of elements </li></ul>
  6. 6. <ul><li>Rocks are made of minerals. </li></ul>
  7. 7. <ul><li>Minerals are Inorganic </li></ul><ul><li>Rocks are inorganic, but may contain some organic matter. </li></ul>
  8. 8. <ul><li>Minerals can be identified by physical and chemical tests. </li></ul>
  9. 9. <ul><li>Minerals are grouped by composition </li></ul><ul><li>Rocks are grouped by formation </li></ul>Rock groups: Metamorphic Igneous Sedimentary
  10. 10. <ul><li>Crystals may be present in minerals and rocks. </li></ul>
  11. 11. <ul><li>Rocks are mixtures of minerals, rock fragments, volcanic glass, organic matter, or other natural materials. </li></ul>
  12. 12. Why do we study rocks? <ul><li>1. Give us clues to what the earth was like millions of years ago. </li></ul><ul><ul><li>Location of ancient lakes, oceans, mountain ranges. </li></ul></ul>
  13. 13. <ul><li>2. Help us find natural resources </li></ul><ul><ul><li>Gold, coal, diamonds </li></ul></ul>
  14. 14. <ul><li>3. Help us learn what life was like in the past. </li></ul><ul><ul><li>fossils </li></ul></ul>
  15. 15. The Rock Cycle <ul><li>The rock cycle is a model showing how the 3 groups/families of rocks form and reform. </li></ul><ul><li>Shows how rocks can change into each other as conditions around them change. </li></ul>
  16. 16. The 3 groups/families of rocks in the rock cycle are: <ul><li>A. Sedimentary rock: can be changed by heat and pressure into metamorphic rock. </li></ul>
  17. 17. <ul><li>B. Metamorphic rock: can melt and cool to form igneous rock. </li></ul>
  18. 18. <ul><li>C. Igneous rock: can be broken into fragments that may later form sedimentary rock. </li></ul>
  19. 19. <ul><li>James Hutton is responsible for the discovery of the rock cycle. </li></ul>
  20. 20. <ul><li>The rock cycle demonstrates conservation of matter: it never destroys elements of rocks but merely redistributes them. </li></ul>

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