plate tectonics project

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Across
  1. 3. stress that occurs when forces act to squeeze an object
  2. 7. the boundary between tectonic plates that are colliding.
  3. 9. the bending of rock layers do to stress.
  4. 10. the boundary between tectonic plates that are sliding past eachother horizontally.
  5. 11. the movement of amtter due to diffrences in density that are caused by tempature by tempature varations; can result in the transfer of energy as heat.
  6. 12. the process by which new ocean lithospere sea floor forms when magma rises to earth's surface at mid-ocean ridges and solidifies, as older, existing se floor moves away from the ridge.
  7. 16. a block of lithospere that consists of the crust and the rigid, outermost part of the mantle.
  8. 17. the location within earth along a fualt at which the first motion of an earthquake occurs.
  9. 18. a break in a body of rock along which one block moves relitave to another.
  10. 21. the theory that explains how large pieces of the lithospere, called plates, move and change shape.
Down
  1. 1. stress that occurs when forces act to stretch an object.
  2. 2. the bending, tilting, and breaking of earth's crust; the cange in the shape of rock in response to stress.
  3. 4. a movement or tenbilingof the ground that is cuased by a sudden release of energy when rocks along a fualt move.
  4. 5. the boundary between two tectonic plates that are movig away from eachother.
  5. 6. the supercontinent that formed 300 millon years ago and that began to break up 200 million years ago.
  6. 8. the edge between two or more plates classified as divergent, convergent, or transform by the movement talking place between place the plates.
  7. 13. the sudden return of elastically deformed rock to its underformed shape.
  8. 14. a break in a body of rock along when one block moves relatives to another.
  9. 15. stress that occurs when forces act in parallel but opposite directions, pushing parts of a solid in opposite directions.
  10. 19. the point on earth's surface directly abouve an earthquakes starting point, or focouse.
  11. 20. the bending,tliting, and breaking of earth's crust; the change in the shape of rock in response to stress.