1. Inside Earth Chapter 5 Rocks 5.2 Igneous Rocks

2. 5.2 Igneous Rocks LEARNING TARGETS I can identify characteristics that are used to classify igneous rocks. I can understand how are igneous rocks used.

3. classify igneous rocks I can identify characteristics that are used to classify igneous rocks. Three ways to classify Igneous Rocks 1.Origin – Intrusive / Extrusive 2.Texture – Course grained to Fine grained 3.Mineral Composition

4. 5.2 Igneous Rocks Key Terms Extrusive – Igneous rock that forms from lava above the Earth’s surface.

5. 5.2 Igneous Rocks Key Terms Intrusive – Igneous rock that forms when magma hardens beneath Earth’s surface.

6. 5.2 Classifying Igneous Rocks Origin – Form beneath the surface INTRUSIVE (Slow cooling) Form on the surface EXTRUSIVE (Rapid cooling) Texture – Fine grain cool RAPIDLY Coarse grain cool SLOWLY Mineral Composition – The mineral content of magma varies Light color generally high silica Dark color generally low silica End