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Igneous rocks

Miss Zavodny. Igneous rocks. Rock Cycle. How are igneous rocks formed?. 2 ways: 1] intrusive Magma cools underground 2] extrusive Magma cools on Earths surface. Texture of igneous rocks. Texture is controlled by cooling rate: Extrusive rocks- Cool quickly and are fine grained

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Igneous rocks

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  1. Miss Zavodny Igneous rocks

  2. Rock Cycle

  3. How are igneous rocks formed? • 2 ways: • 1] intrusive • Magma cools underground • 2] extrusive • Magma cools on Earths surface

  4. Texture of igneous rocks • Texture is controlled by cooling rate: • Extrusive rocks- • Cool quickly and are fine grained • (small crystals) • Have a shinierfinish becausethey cool fast.

  5. Texture of igneous rocks • Intrusive • Cools slowly and are coarse grained • (large crystals)

  6. Chemistry of igneous rocks

  7. Now lets look at some pictures and see if you can tell them apart!

  8. Intrusive or extrusive? (Hint: Look at the crystals) (for answer click on picture)

  9. Igneous or extrusive Hint: it’s shiny. (for answer click on picture)

  10. Now lets try it without hints!!!!

  11. Intrusive or extrusive (for answer click on picture)

  12. Intrusive or extrusive (for answer click on picture)

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