Science Crossword

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Across
  1. 4. Ground that slants downward or upward. (S)
  2. 5. A mild tremor preceding the violent shaking movement of an earthquake. (F)
  3. 6. The branch of science concerned with earthquakes and related phenomena. (S)
  4. 8. Is a smaller earthquake that follows a larger earthquake, (A)
  5. 10. A theory of the condition of approximate equilibrium in the outer part of the earth. (I)
  6. 14. The process of making something, especially a gas, liquid. (L)
  7. 18. A part of plate tectonics. Its discovery provided a mechanism for continental drift that Alfred Wegener could not explain. In this lesson, you will learn about this important geologic process. (S) (S)
  8. 19. A hypothetical super continent that included all current land masses, believed to have been in existence before the continents broke apart during the Triassic and Jurassic Periods. (PAN-EA)
  9. 20. An opening exposed on the earth's surface where volcanic material is emitted. (V)
  10. 22. A large natural elevation of the earth's surface rising abruptly from the surrounding level; a large steep hill. (M)
  11. 24. The process of eroding or being eroded by wind, water, or other natural agents. (E)
  12. 26. A shaking of a part of the earth's surface that often causes great damage. (E)
  13. 27. A measure of the amount of energy released by an earthquake. (M)
Down
  1. 1. Locations on Earth's surface that has experienced active volcano activities for a long period of time. (H)
  2. 2. A mountain with a hole in the top or side that sometimes sends out rocks, ash, lava, etc., in a sudden explosion (called eruption). (V)
  3. 3. The point within the earth where an earthquake rupture starts. (H)
  4. 7. An elastic wave in the earth produced by an earthquake or other means. (S) (W)
  5. 9. A fracture along which the blocks of crust on either side have moved relative to one another parallel to the fracture. (F)
  6. 11. The sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate. (S)
  7. 12. The upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur. (A)
  8. 13. A geologic plate in which most of the crust (the top rock layer is mostly land). (C) (P)
  9. 15. A natural feature of the earth's surface. (L)
  10. 16. A long high sea wave caused by an earthquake, submarine landslide, or other disturbance (T)
  11. 17. Hot liquid rock below the surface of the Earth. (M)
  12. 21. A narrow, straight, elongate, U-Shaped valley between two mountain ranges. (T)
  13. 23. The region between an oceanic trench and the associated volcanic arc. (F)
  14. 25. The point on the earth's surface vertically above the focus of an earthquake. (E)