1. Lesson 2 Power Point

2. Igneous Rocks Igneous rocks are formed from magma (Arizona, 2007). “The two main types of igneous rocks are plutonic and volcanic. Igneous rocks are formed from magma (Arizona, 2007). “The two main types of igneous rocks are plutonic and volcanic. Plutonic rocks are formed when magma cools and solidifies underground. Plutonic rocks are formed when magma cools and solidifies underground.

3. Volcanic Rocks “Volcanic rocks are formed from lava that flows on the surface of the Earth and other planets and then cools and solidifies” (Arizona, 2007, p. 1) “Volcanic rocks are formed from lava that flows on the surface of the Earth and other planets and then cools and solidifies” (Arizona, 2007, p. 1) It is important to look at texture of rocks. It is important to look at texture of rocks. All rocks have different characteristics All rocks have different characteristics

4. Crystals When magma cools, the rocks form crystals. When magma cools, the rocks form crystals. Could be large or small Could be large or small

5. Igneous Rocks There are many different compositions of igneous rocks. There are many different compositions of igneous rocks. Could be dark-high in Iron Could be dark-high in Iron Could be light- felsic rocks Could be light- felsic rocks

6. Sedimentary Rocks 2 types of Sedimentary Rocks 2 types of Sedimentary Rocks Clastic or chemical Clastic or chemical Clastic-glued together by other rocks Clastic-glued together by other rocksExample:Sandstone  Chemical- what is left over after being in dissolved water Example:Halite

7. Sedimentary Rocks: One other class that could be considered would be rocks made from plants such as coal. One other class that could be considered would be rocks made from plants such as coal.

8. Metamorphic Rocks Form when under a lot of pressure or high temperature (Arizona, 2007). Form when under a lot of pressure or high temperature (Arizona, 2007). Examples: diamond and granite Examples: diamond and granite Diamonds for under really high pressure Diamonds for under really high pressure What happened in order for this rock to come so close to the Earth’s surface? What happened in order for this rock to come so close to the Earth’s surface?