Ch. 7 Plate Tectonics Part 1

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Across
  1. 5. The theory that continents can drift apart from one another and have done so in the past.
  2. 7. The theory that the Earth’s lithosphere is divided into tectonic plates that move around on top of the asthenosphere.
  3. 8. The process by which new oceanic lithosphere is created at mid-ocean lithosphere is created at mid-ocean ridges as older materials are pulled away from the ridge.
  4. 9. The central, spherical part of the Earth below the mantle.
  5. 11. The solid dense center of the Earth.
  6. 12. A piece of the lithosphere that moves around on top of the asthenosphere.
Down
  1. 1. The liquid layer of the Earth’s core that lies beneath the mantle and surrounds the inner core.
  2. 2. The soft layer of the mantle on which pieces of the lithosphere move.
  3. 3. The thin, outermost layer of the Earth, or the uppermost part of the lithosphere.
  4. 4. The layer of the Earth between the crust and the core.
  5. 6. The outermost, rigid layer of the Earth that consists of the crust and the rigid upper part of the mantle.
  6. 10. The “middle sphere” – the strong, lower part of the mantle between the asthenosphere and the outer core.