7th Grade BGM Geology

Edit Answers
1234567891011121314151617181920212223
Across
  1. 1. Tectonics The theory that the earth is broken into plates and are in motion due to convection currents in the asthenosphere (upper mantle)
  2. 3. process in which two plates collide and the denser ocean plate descends below the other
  3. 4. Drift The hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations
  4. 6. rock In which type of rock do you typically find fossils?
  5. 9. layers of sedimentary rock
  6. 11. The thin and solid outermost layer of the Earth above the mantle
  7. 13. Process in which sediment is laid down in new locations.
  8. 14. spreading The process by which new oceanic crust forms as magma rises towards the surface and solidifies at divergent boundaries.
  9. 15. ridge an underwater mountain range made at divergent plate boundaries
  10. 18. fossils Distinctive fossils used to establish and compare the relative ages of rock layers and the fossils they contain
  11. 20. a sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals
  12. 22. The process by which water, ice, wind, or gravity moves weathered rock and soil.
  13. 23. The chemical and physical processes that break down rock and other materials on Earth's surface.
Down
  1. 2. no longer in existence
  2. 5. Boundary The boundary between tectonic plates that are sliding past each other horizontally
  3. 7. The sudden release of strain energy in the Earth's crust, resulting in waves of shaking that radiate outwards from the earthquake source.
  4. 8. Boundary The boundary between two tectonic plates that are moving away from each other
  5. 9. Earth materials created by weathering and deposited by erosion.
  6. 10. A giant wave usually caused by an earthquake beneath the ocean floor.
  7. 12. extremely deep areas in the ocean that are created by a subducting plate
  8. 16. current a current caused by the rising of heated fluid that is less dense and sinking of cooled fluid that is more dense that drives plate movement in the mantle of the earth
  9. 17. term for the super continent which contained all the plates together
  10. 19. Boundary The boundary formed by the collision of two plates
  11. 21. record chronological collection of all fossils found in sedimentary rock layers