Geological processes-Act 8-13

12345678910111213
Across
  1. 1. Where 2 or more of Earth's plates meet.
  2. 4. Size of an earthquake
  3. 5. Time periods of thousands, millions, and billions of years.
  4. 7. The idea that the continents were once joined together to form a single large continent, which over time broke up and slowly moved great distances apart.
  5. 8. Sections of Earth's lithosphere that float on the mantle
  6. 10. A plate boundary where two plates slide past each other.
  7. 11. The process of one plate sliding under another.
  8. 12. A deep, narrow depression on the sea floor.
  9. 13. The solid layer of Earth’s crust and upper mantle.
Down
  1. 1. The theory that the Earth’s lithospheric plates are in constant motion.
  2. 2. A large underwater volcanic mountain chain
  3. 3. A plate boundary where two plates divide(pull apart).
  4. 6. The weak, soft layer of the mantle 100-250 km below Earth's surface
  5. 9. A plate boundary where two plates collide or crash into each other.