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Across Down 3. Place where most earthquake and volcanic activity occurs on Earth 1. Rock formed by great heat and pressure 5. Fastest, push-pull seismic waves 2. Collision between plates that can form mountains, island arcs or trenches 7. Boundary where sea-floor spreading occurs; mid-ocean ridge is formed 9. Volcanoes made of only rock and ash 11. Process of changing rocks from one type to another 14. Inorganic, solid, naturally occurring substance with a definite chemical and crystal composition 15. Point under the surface where the earthquake begins 16. Moving small fragments of rock to new places 4. Idea that Earth’s continents were once joined and have moved over time 6. Process of returning crust to the mantle; at convergent boundaries 8. How scientists study the layers of the Earth 9. Made of layers of rock and lava 10. Structure on Earth that can be constructive and destructive 12. Forces that move the crust 18. Rock formed from crystallized magma 19. How a mineral reflects light; metallic or non-metallic 20. Breaking rock into small pieces 21. Founder of the Theory of Continental Drift 23. Volcanoes made of quiet flows of runny lava 24. Rock that can be clastic, organic or chemical 25. Place where plates slide past each other 13. Point where seismic waves are first felt 17. Area where mantle is very active and may form volcanic islands 22. Color powder scraped off a mineral; better than color for identifying In the space below, construct a graphic organizer that shows relationships between the following topics: Formation of the Earth, Interior of the Earth, Plate Tectonics, Continental Drift, Earthquakes, Volcanoes, Minerals, and Rocks. This organizer can be a brief outline, a chart that defines and gives some supporting facts for each, a series of Venn Diagrams, or any other format you choose that will demonstrate what you have learned about this unit. Use the front and back of this page if necessary. You will need this chart to help you with the writing prompt that you will complete to conclude this unit,