Lesson 4 Plate Tectonics

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Across
  1. 4. The continents were joined in a single large landmass
  2. 5. The lithosphere is divided into pieces
  3. 6. Form when two plates collide
  4. 7. Describes large-scale movements of Earth's lithosphere, which is made up of the crust and the rigid, upper part of the mantle
Down
  1. 1. Two plates move away from each other
  2. 2. To explain the age and magnetic patterns of sea-floor rocks, scientists proposed a proposal
  3. 3. A boundary at which two plates move past each other horizontally
  4. 8. This kind of movement of material due to difference in density