Plate Tectonics

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 1. A hypothetical continent including all the landmass of the earth prior to the Triassic period when (7)
  2. 3. United States baseball player (6)
  3. 6. A geological process in which one edge of a crustal plate is forced sideways and downward into (10)
  4. 8. Energy that travels in waves or particles (9)
  5. 9. The lower layer of the crust (13)
  6. 11. Plutonic igneous rock having visibly crystalline texture (7)
  7. 12. How tightly packed the matter in something is (7)
  8. 14. The commonest type of solidified lava (6)
  9. 15. Hard outer layer of the Earth or of bread (5)

Down

  1. 1. Base consisting of a rubber slab where the batter stands (5)
  2. 2. The transmission of heat or electricity or sound (10)
  3. 4. The solid part of the earth consisting of the crust and outer mantle (11)
  4. 5. A measuring instrument that sends out an acoustic pulse in water and measures distances in terms (5)
  5. 7. Force pushing on something (8)
  6. 10. The remains of a plant or animal that existed in a past geological age and that has been excavated (6)
  7. 13. A crack in the earth's crust resulting from the displacement of one side with respect to the other (5)