Welcome to Science 11/2 • Get your HW out. You will be working with a partner to answer three questions that you will find in a book about rocks. You have 10 minutes to complete this. Turn in HW The Global Village • If the world’s pop. was 100 people with all of the existing human ratios remaining the same, the village would include: 60 Asians, 12 Europeans, 9 Latin Americans, 5 N. Americans, 1 Oceanian, 13 Africans 50 female/50 male, 80 nonwhite/20 white 20 people would earn 89% of the wealth 25 would live in substandard housing 17 would be unable to read 13 would suffer from malnutrition 1 would die within the year 2 would give birth within the year 2 would have a college education 4 would have a computer Welcome to Science 11/2 • Observe the pictures below. On your paper, list as many similarities as you can about the pictures. I. Classifying Rocks • Observe the rock on your desk. On your paper, list as many descriptions of the rock as you can. • When classifying rocks, what 3 characteristics of rocks do geologists study? • 1. Mineral Composition (what the rock is made of) • 2. Color • 3. Texture II. 90% of Earth’s crust is made of Igneous Rocks. Why? • Igneous- comes from the Latin word for “fire” • Origin- born from the cooling and hardening of magma & lava III. Composition & Texture • The type of igneous rock that forms depends on what it is made of and how fast it cools. • Slow cooling magma/lava = coarse,rough text. • Fast cooling magma/lava = smoother, text. • Slowest 2nd Slowest Fastest IV. Igneous Rock Formations • Intrusive Rock- magma that has cooled beneath Earth’s surface. • Volcanic necks, plutons, batholiths • volcanic neck V. Igneous Rock Formations • Extrusive Rock- forms from the cooling of lava on Earth’s surface • Why are these rocks important? • This is a major process responsible for building new crust. Assignment: Acrostic Poem • Your assignment for tonight is to create an acrostic poem for the word igneous. Here is an example.