Chapter 7: Science

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Across
  1. 5. A large landmass of all land on Earth joined together that began to break apart approximately 200 million years ago
  2. 7. The movement of Earth’s continents over time
  3. 9. A deep, underwater trough created by one plate subducting under another plate at a convergent plate boundary
  4. 10. The process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge
  5. 12. The boundary between two plates that move toward each other
  6. 14. A large section of Earth’s oceanic or continental crust and the rigid upper mantle that moves around on the asthenosphere
  7. 15. The circulation of particles within a material caused by differences in thermal energy and density
Down
  1. 1. When magnetized objects reverse direction and orient themselves to point south
  2. 2. Long, narrow mountain range on the ocean floor; formed by magma at divergent plate boundaries
  3. 3. The theory that Earth’s surface is broken into large, rigid pieces that move with respect to each other
  4. 4. The process that moves large bodies of Earth materials to higher elevations
  5. 6. The boundary between two plates that slide past each other
  6. 8. The boundary between two plates that move away from each other
  7. 11. The process that occurs when one tectonic plate moves under another tectonic plate
  8. 13. When magnetized objects, such as compass needles, orient themselves to point north