This question will appear on exam 1 next week. try answering this and turn it in at the beginning of class on 7/11. be sure to use full sentences when describing. sketch, label, and describe the major layers of earth. include in your description the chemical composition and physical properties. be sure to include the difference between continental and oceanic crust. next, sketch and describe the difference between lithosphere and asthenosphere. (see lecture 2 slides 17-27) 1.