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Rocks
There are three categories of rocks <ul><li>Igneous rocks  </li></ul><ul><li>Sedimentary rocks </li></ul><ul><li>Metamorph...
Igneous Rock
Vocabulary  <ul><li>_________- molten rock beneath the earth’s surface </li></ul><ul><li>________- small holes made from s...
Igneous Rocks Definition  <ul><li>Igneous rocks are  formed from the solidification (making hard) and crystallization of m...
Two Types of Molten Rocks  <ul><li>Magma – is the molten rock beneath the Earth’s surface  </li></ul><ul><li>Lava is the m...
<ul><li>When magma or lava cools and solidifies it forms igneous rocks </li></ul><ul><ul><li>As the liquid rocks gets hard...
Two types of Igneous Textures  <ul><li>The texture of igneous rock is dependent (relies) the rate (speed) of  cooling.  </...
Vesicular  <ul><li>When bubbles of gas are in solidified lava there are gas holes called Vesicles  </li></ul><ul><ul><li>I...
Cooling , Temperature, & Pressure  <ul><li>Cooling is related to both temperature and pressure  </li></ul><ul><ul><li>When...
What are extrusive and intrusive Igneous rocks?
Extrusive Igneous rocks <ul><li>Extrusive – when the lava exits the earth’s  </li></ul><ul><li>surface and hardens.  </li>...
Intrusive Igneous Rocks  <ul><li>Intrusive when the magma hardens inside  the earth.  </li></ul><ul><ul><li>since there is...
Let’s recap! How do Igneous rocks form  Through the solidification and  crystallization of magma and lava!
How does magma form?  Minerals must be melted  Some like mica melt under very low temp and other needs a higher temp to me...
Igneous rock scheme ( ESRT) <ul><li>This chart is used to help us identify What type of Igneous rock it is. </li></ul><ul>...
Where are igneous rocks found? All over They are in oceans, continental rocks
Felsic  High density  Graphitic Basalt  Low density rocks  Mafic Continental Ocean
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Rocks

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Transcript of "Rocks"

  1. 1. Rocks
  2. 2. There are three categories of rocks <ul><li>Igneous rocks </li></ul><ul><li>Sedimentary rocks </li></ul><ul><li>Metamorphic rocks </li></ul>
  3. 3. Igneous Rock
  4. 4. Vocabulary <ul><li>_________- molten rock beneath the earth’s surface </li></ul><ul><li>________- small holes made from solified gas bubbles </li></ul><ul><li>__________- the molten rock that reaches the earth’s surface </li></ul><ul><li>___________- rough </li></ul><ul><li>____________- lava flows out and hardens </li></ul><ul><li>______________- when magma harderns inside the earth </li></ul>
  5. 5. Igneous Rocks Definition <ul><li>Igneous rocks are formed from the solidification (making hard) and crystallization of molten rock. </li></ul><ul><ul><li>This makes the rocks hard, solid and compact. </li></ul></ul>
  6. 6. Two Types of Molten Rocks <ul><li>Magma – is the molten rock beneath the Earth’s surface </li></ul><ul><li>Lava is the molten rock that reaches the Earth’s surface </li></ul>
  7. 7. <ul><li>When magma or lava cools and solidifies it forms igneous rocks </li></ul><ul><ul><li>As the liquid rocks gets harder crystals may form </li></ul></ul><ul><ul><ul><li>This gives the igneous rocks it’s texture </li></ul></ul></ul>
  8. 8. Two types of Igneous Textures <ul><li>The texture of igneous rock is dependent (relies) the rate (speed) of cooling. </li></ul><ul><ul><li>Slow cooling bigger crystals </li></ul></ul><ul><ul><ul><li>Coarser (rougher) texture </li></ul></ul></ul><ul><ul><li>Rapid cooling smaller crystals </li></ul></ul><ul><ul><ul><li>Finer texture </li></ul></ul></ul>
  9. 9. Vesicular <ul><li>When bubbles of gas are in solidified lava there are gas holes called Vesicles </li></ul><ul><ul><li>Igneous rocks that have these holes are said to be vesicular. </li></ul></ul>
  10. 10. Cooling , Temperature, & Pressure <ul><li>Cooling is related to both temperature and pressure </li></ul><ul><ul><li>When the temperature drops rapidly or pressure is lessened you are going to have less crystals and a finer texture. </li></ul></ul><ul><ul><li>This is usually with molten rocks closer to the earth’s surface or lava on top of the surface. </li></ul></ul>
  11. 11. What are extrusive and intrusive Igneous rocks?
  12. 12. Extrusive Igneous rocks <ul><li>Extrusive – when the lava exits the earth’s </li></ul><ul><li>surface and hardens. </li></ul><ul><li>- since it is cooler and less pressure exists on the surface the rocks are finer and have less crystals. </li></ul>Exit –leave outside
  13. 13. Intrusive Igneous Rocks <ul><li>Intrusive when the magma hardens inside the earth. </li></ul><ul><ul><li>since there is more pressure and heat the deeper you go into the Earth </li></ul></ul><ul><ul><ul><li>the larger the crystals and the courser (rougher) the texture of the rock is </li></ul></ul></ul>IN
  14. 14. Let’s recap! How do Igneous rocks form Through the solidification and crystallization of magma and lava!
  15. 15. How does magma form? Minerals must be melted Some like mica melt under very low temp and other needs a higher temp to melt
  16. 16. Igneous rock scheme ( ESRT) <ul><li>This chart is used to help us identify What type of Igneous rock it is. </li></ul><ul><ul><li>It shows us </li></ul></ul><ul><ul><ul><li>Color </li></ul></ul></ul><ul><ul><ul><li>Texture </li></ul></ul></ul><ul><ul><ul><li>Density </li></ul></ul></ul><ul><ul><ul><li>Mineral composition </li></ul></ul></ul>
  17. 17. Where are igneous rocks found? All over They are in oceans, continental rocks
  18. 18. Felsic High density Graphitic Basalt Low density rocks Mafic Continental Ocean
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