Semester 1 Exam Study Guide Questions.  Intrusive rocks are formed inside the earth by the cooling of magma.  Extrusive rocks are formed on the earth’s.

Semester 1 Exam Study Guide Questions

 Intrusive rocks are formed inside the earth by the cooling of magma.  Extrusive rocks are formed on the earth’s surface by the cooling of lava.

SedimentaryMetamorphicIgneous WEDCC Heat and/or Melting and Weathering Pressure Cooling of Erosion Magma/Lava Deposition Cementation Compaction

 Bubbles of air were trapped in the rock when it cooled.

 Sedimentary:  Breaks easily/ crumbly  Fossils  Layers  Pebbles are visible

 Metamorphic:  Small crystals  Bands

 Igneous:  Smooth and glassy  Gas bubble holes  Large crystals

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