Plate Tectonics

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Across
  1. 2. First clue of Alfred Wegners theory
  2. 3. a circle around the Pacific ocean with the most volcanic and seismic activity
  3. 4. when two plates collide
  4. 5. Transform boundries main formation
Down
  1. 1. Thinner more dense crust
  2. 2. The name of the supercontinent