Geologist: ______________________________ Period: __________ Earth Science: Our Dynamic Earth Quiz Review Quiz Date: ________________ 1. Label & color the 3 main layers of the Earth. Crust Mantle Core 2. List the missing physical layers of the Earth. 1. Lithosphere 2. Mesosphere 3. Outer Core 3. Look at the convection currents and label the types of plate boundaries in the image below. Position A: Position B: - What type of boundary is at position A? DIVERGENT What type of boundary is at position B? CONVERGENT (Subduction) 4. Complete the following chart about plate boundaries: Type of Plate Boundary How the plates move What they form Convergent Towards each other Mountains & volcanoes Trenches Divergent Move away – separate New ocean floor Transform Slide past each other horizontally Trigger earthquakes – no material is created nor destroyed 5. Explain how convection currents cause tectonic plates to move. Hot rock from deep within the Earth rises (density decreases), but cooler rock near the surface sinks (density increases). Convection currents under the lithosphere cause the plates to move either towards or away from each other. 6. What part of the physical layer of the Earth are tectonic plates? lithosphere 7. Identify the two types of crust: a. Continental b. Oceanic 8. Which type of crust is more dense? oceanic 9. What force causes the layers of the Earth to form? Gravity 10. Explain Alfred Wegener’s Theory of Continental Drift. *Include the name of the` supercontinent. Wegener believed that once all the worlds’ continents were connected creating a supercontinent he named Pangaea. He believed that the continents broke apart and since drifted over time. 11. Identify and explain pieces of evidence Wegener used to support his theory. a. Fossils: found fossils of the same species of reptiles on different continents b. Rock Formations: same rocks and mountain chains were found in South America & Africa. The rocks were the same age and of the same origin c. Glaciers: evidence of glaciers were found in South America, Africa, Australia and Antarctica. Glaciers carved the land and deposited rocks to new locations. 12. Why did people have difficulty accepting Wegener’s theory? He was unable to explain WHY or HOW the continents moved.