Plate Tectonics Crossword - ScienceSaurus Sections 181 to 186

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Across
  1. 3. A _________________ boundary forms when two plates move away from each other. (184)
  2. 4. A __________________ boundary forms where two plates slide past each other. (184)
  3. 9. Plate __________________ occur where the edges of plates meet. (184)
  4. 11. Today's theory of plate __________________ is a more complete picture that includes all the evidence that the continents have moved and are still moving. (182)
  5. 13. A ____________________ boundary forms where plates collide. (184)
  6. 16. Colliding ocean and continental plates make mountains like the _____________. (184)
  7. 18. Colliding continental plates make mountains like the ___________________________. (184)
  8. 21. A violent shaking of Earth's crust. (186)
  9. 22. The spot on Earth's surface directly above the focus. (186)
  10. 23. Large cracks in Earth's crust are called _____________. (186)
  11. 24. Uneven heating causes material in the mantle to constantly and slowly rise and fall in a _________________ current. (183)
Down
  1. 1. Colliding ocean plates makes volcanic islands like the _________________________. (184)
  2. 2. The strength , or _________________, of an earthquake can be measured using a seismograph. (186)
  3. 5. The most common scale used to measure earthquake magnitude. (186)
  4. 6. The movement of one plate under another is called ________________________. (184)
  5. 7. The place in Earth's crust where the pressure was released is called the ____________. (186)
  6. 8. Separating plates makes mid-ocean ridges like Mid-Atlantic ____________. (184)
  7. 10. ___________________ waves (also called S-waves) move land side to side. (186)
  8. 12. In 1912, Alfred Wegener proposed the theory of ___________________ drift. (182)
  9. 14. The Ring of ________ is a ring-shaped belt of volcano and earthquake activity in the Pacific Ocean. (185)
  10. 15. Earth's solid crust lies over a layer of melted material called the ________________. (183)
  11. 17. __________________ waves (also called P-waves) stretch and compress land as they pass through. (186)
  12. 19. Large portions of the crust, called _____________________ plates, ride on top across Earth's surface. (183)
  13. 20. ________________ waves spread out in all directions from the focus like ripples in a pond. (186)
  14. 25. Earth has two kinds of crust: Continental Crust and ___________________ Crust. (183)