Plate Tectonic

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Across
  1. 4. plate - What is it? thickness and matter state, density, behavior
  2. 5. drift - What is it? Who proposed it? Evidence of support?
  3. 6. -- What is it? thickness and matter state, density, behavior
Down
  1. 1. plate - What is it? thickness and matter state, density, behavior
  2. 2. - What is it? thickness and matter state, density, behavior
  3. 3. tectonics - What is it? Evidence of support?