Plate Tectonics

123456789
Across
  1. 1. the boundary between two tectonic plates that are moving away from each other
  2. 3. the layer of Earth between the crust and the core
  3. 6. the thin, outermost layer of the Earth
  4. 7. the theory that the Earth's lithosphere is divided into tectonic plates that move around on top of the asthenosphere
  5. 9. the outermost, rigid layer of the Earth that consists of the crust and the rigid upper part of the mantle
Down
  1. 2. the liquid layer of the Earth's core that lies beneath the mantle and surrounds the inner core
  2. 4. the soft layer of the mantle on which pieces of the lithosphere move
  3. 5. a break in the Earth's crust along which two blocks of the crust slide relative to one another
  4. 8. a piece of the lithosphere that moves around on top the asthenosphere