Across
- 2. transfer of heat energy through solid matter as one particle strikes another
- 5. 1400 miles thick
- 8. layer of earth between the crust and outer core
- 9. brittle outer layer of the earth that includes the crust and upper mantle
- 10. scientist who studies Earth
- 11. solid iron center of the earth's core
Down
- 1. hot layer of earth's upper mantle that flows very slowly
- 2. cycling of flowing matter as it is heated and cooled
- 3. earth's outermost layer
- 4. tectonics theory that earth's solid plates move on top of the asthenosphere
- 5. liquid metal layer of earth between the inner core and mantle
- 6. middle layer and thickest
- 7. 750 miles thick