vocabulary

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Across
  1. 1. a section of the lithosphere that slowly moves
  2. 5. a layer of molten iron and nickle in the earth
  3. 6. the amount of mass in a given space; mass per unit volume
  4. 8. a rigid layer made of the uppermost layer of the mantle
  5. 10. the soft layer of the mantle on which the lithosphere floats
  6. 13. a dense sphere of solid iron and nickel
  7. 15. a trace of an ancient organism that has been preserved in rock
  8. 19. the transfer of heat through empty space
Down
  1. 1. the amount of force pushing on a surface or area
  2. 2. the study of the planet earth
  3. 3. the super continent
  4. 4. the transfer of heat through a warmer object to a cooler object
  5. 7. great land masses
  6. 9. the transfer of heat by contact of particles of matter
  7. 11. the process by which denser crust slides under each other
  8. 12. a scientist who studies the forces of earth
  9. 14. the transfer of heat by movements of a heated fluid
  10. 16. a device that determines the distance of an object underwater
  11. 17. layer of rock that forms outer surface
  12. 18. the layer of the earth made of hot, solid material between earth's crust and core