Multiple choice Which of the following layers of the atmosphere is made up of rock? Lithosphere Mesosphere Thermosphere Hydrosphere Stratosphere Reveal answer Fill a bubble to check yourself A Correct answer Explanation The outer solid layer of the earth, called the lithosphere, is made of rock. The lithosphere is the solid outermost shell of a rocky planet. On the Earth, the lithosphere includes the crust and the uppermost layer of the mantle.