Observe the pictures on the board. Below, list as many similarities as you can about the pictures. I. Classifying Rocks Observe the rock on your desk. Below, list an many descriptions of the rock as you can. • When classifying rocks, what 3 characteristics of rocks do geologists study? • 1. ______________________________________ (what the rock is made of) • 2. ______________________ • 3. ______________________ II. 90% of Earth’s crust is made of Igneous Rocks. Why? • ___________________________- comes from the Latin word for “fire” • Origin- born from the cooling and hardening of ______________ & ______________ III. Composition & Texture • The _________________ of igneous rock that forms depends on what it is made of and how __________________ it cools. • Slow cooling ________________/__________________ = coarse,rough texture • Fast cooling magma/lava = _________________________, texture IV. Igneous Rock Formations • • ____________________ Rock- magma that has cooled _________________ Earth’s surface. Volcanic necks, plutons, batholiths V. Igneous Rock Formations • • • ___________________ Rock- forms from the cooling of ___________ on Earth’s surface Why are these rocks important? This is a major process responsible for ___________________ new crust. Assignment: Acrostic Poem • Your assignment for tonight is to create an acrostic poem for the word igneous. Here is an example • .