Rocks: Mineral Mixtures Chapter 4 Rocks: Mineral Mixtures Chap 4, Sect 2 (Igneous Rock) Objectives: Explain how the cooling rate of magma affects the texture of igneous rock. Distinguish between igneous rock that cools under Earth’s crust and igneous rock that cools on Earth’s surface.

Igneous Rock Classifications 2 Ways Igneous Rock Forms: _______________________Surface of Earth_______________________ Igneous Rock Classifications Extrusive Intrusive i

Tech Terms: Igneous Rock intrusive 2. extrusive forms when magma forms when magma “intrudes” or pushes “exits” or erupts onto into surrounding Earth’s surface. (fine- rock UNDER earth’s grained rock that surface. (coarse- cooled quickly) grained rock that cooled slowly) 3 geological process form igneous rocks