Ch 3+4 Vocab Crossword

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Across
  1. 1. Primary waves from an earthquake that can travel through solids and liquids
  2. 9. The time it takes for half of the radioactive element in a substance to decay into the decay product
  3. 11. _______ Dating: A form of absolute dating that measures the decay-product ratio of a radioactive element
  4. 12. Mid-Ocean _____: Undersea ranges that form at divergent boundaries where new oceanic crust is forming
  5. 13. the movement of heated fluids due to density differences
  6. 16. ______ Boundary: A tectonic zone where two plates are moving toward each other
  7. 19. A break in the Earth’s crust showing tectonic movement
  8. 21. Secondary waves from an earthquake that cannot travel through liquids
  9. 22. Rocks that are changed by intense heat and pressure, changing the mineral composition
Down
  1. 2. The process by which particles gather by gravity to form larger bodies like stars, planets, and moons.
  2. 3. Tectonic zone where a plate is sinking below another
  3. 4. ______ Boundary: A tectonic zone where new crust is being created by rising magma and pushes existing crust away
  4. 5. An ancient supercontinent that broke apart millions of years ago to form the present continents
  5. 6. Natural, solid inorganic substances that make up rocks
  6. 7. Plate ________: Theory of crustal motion that describes how the crust is divided into a dozen plates that carry the continents
  7. 8. Rocks that are compacted and cemented from weathered sediments
  8. 10. _____ Spot: A location where a plume of magma consistently rises causing volcanism
  9. 14. Rocks that form from the cooling a crystallization of magma or lava
  10. 15. Natural vibrations that radiate from a sudden tectonic movement or magma under a volcano
  11. 17. _______ boundary: Tectonic zone where plates are moving past each other
  12. 18. Late Heavy ______: A period 4 billion years ago when the early solar system had a high rate of asteroid, comet, and meteoroid impacts
  13. 20. The location on the crust above where an earthquake occurred underground