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Igneous Rocks<br />(with slides from “ms simmons”)<br />
Magma forms igneous rocks<br />
What is magma?	<br />Hot molten (melted) rocks<br />When magma cools inside the earth, it forms igneous rocks<br />When ma...
Magma and lava<br />
Molten rocks<br />Inside the earth = magma<br />Outside the earth = lava<br />How does magma escape to the outside? (Magma...
Volcano<br />
Intrusive rocks<br />Formed when magma cools INSIDE the earth.<br />
Extrusive rocks<br />Formed when magma (as lava) cools OUTSIDE the earth.<br />In-<br />Ex-<br />
Cooling<br />Intrusive vs. Extrusive rocks: which will cool faster?<br />
Extrusive Rocks<br />Formed at earth’s surface<br />Lava’s minerals cool and harden quickly<br />Forms tiny crystals<br />...
Intrusive Rocks<br /><ul><li>Formed below earth’s surface
Magma’s minerals cool and harden slowly
Forms coarse crystals</li></ul>Diorite<br />Gabbro<br />Granite<br />
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Transcript of "Es4"

  1. 1. Igneous Rocks<br />(with slides from “ms simmons”)<br />
  2. 2. Magma forms igneous rocks<br />
  3. 3. What is magma? <br />Hot molten (melted) rocks<br />When magma cools inside the earth, it forms igneous rocks<br />When magma (lava)cools outside the earth, it forms igneous rocks<br />
  4. 4. Magma and lava<br />
  5. 5. Molten rocks<br />Inside the earth = magma<br />Outside the earth = lava<br />How does magma escape to the outside? (Magma escapes to the outside through ______)<br />
  6. 6. Volcano<br />
  7. 7. Intrusive rocks<br />Formed when magma cools INSIDE the earth.<br />
  8. 8. Extrusive rocks<br />Formed when magma (as lava) cools OUTSIDE the earth.<br />In-<br />Ex-<br />
  9. 9. Cooling<br />Intrusive vs. Extrusive rocks: which will cool faster?<br />
  10. 10. Extrusive Rocks<br />Formed at earth’s surface<br />Lava’s minerals cool and harden quickly<br />Forms tiny crystals<br />Rhyolite <br />Obsidian<br />Andesite<br />Basalt<br />
  11. 11. Intrusive Rocks<br /><ul><li>Formed below earth’s surface
  12. 12. Magma’s minerals cool and harden slowly
  13. 13. Forms coarse crystals</li></ul>Diorite<br />Gabbro<br />Granite<br />
  14. 14. Quiz<br />As the head geologist of an expedition, you come across an unknown mineral.<br />1. How do you convince your colleagues that it’s indeed a mineral? (hint: how do you define a mineral?) Name 5 defining criteria of the mineral that make it a mineral. <br />a. minerals are solid<br />2. Name 3 properties of the mineral that you’d test to identify the mineral.<br />
  15. 15. Quiz<br />What is magma? i.e. what is it made of?<br />What is lava? i.e. how is it different from magma?<br />Which type of rocks does lava form when it cools?<br />Which type of rocks does magma form when it cools?<br />Define a mineral. (name 5 criteria)<br />a. minerals are solid<br />
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