Rocks: Mineral Mixtures Chapter 4 Rocks: Mineral Mixtures Chap 4, Sect 2 (Igneous Rock) Objectives: Explain how the cooling rate of magma/lava 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: magma – molten or hot liquid rock, found under Earth’s surface lava – molten or hot liquid rock, found on top of Earth’s surface

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 (draw them below)