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student handout Name________________________________________________________________________________________________________ Formative Assessment 1. What is plate tectonics theory? 2. What are the layers of the earth? 3. Which of the following is convection? a. A transfer of heat by two objects touching b. A transfer of heat by electromagnetic wave c. A transfer of heat by a circulation of a fluid d. A transfer of heat by ions 4. Which of the following are radiant energy? a. Ultraviolet light b. Visible light c. Infrared light d. X-rays e. All of the above Earth Motion3: Our Changing Earth 165 answer key Formative Assessment Answer Sheet 1. What is Plate Tectonics Theory? The term for the field of study of large scale motions of the earth’s lithosphere. 2. What are the layers of the earth? The innermost layer is a very hot core of iron and nickel. The inside of the core is solid and the outside is liquid. The middle layer is the mantle. It is composed of rock that flows very slowly. The outermost layer is the crust. There is oceanic crust and continental crust. The crust and the upper part of the mantle (which is cooler and more rigid than the lower part) together make up the lithosphere. The lithosphere is broken into huge rocky slabs called tectonic plates. These plates ride on top of the asthenosphere, a hot, semisolid part of the mantle that lies directly under the lithosphere. 3. Which of the following is convection? c. A transfer of heat by a circulation of a fluid. 4. Which of the following are radiant energy? e. All of the above. 166