Science TEKS 8.9 A (Historical Plate Tectonic Theory) & B (Formation of Crustal Features)

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Across
  1. 2. A break or crack in the Earth’s lithosphere along which rocks move.
  2. 11. Alfred Wegener’s explanation of continents moving slowly and changing their positions
  3. 14. The most dense portion of the Earth’s crust
  4. 16. The theory that pieces of Earth’s lithosphere are in constant motion, driven by convection currents in the mantle.
  5. 17. Part of Earth’s mantle that is just below the lithosphere.
  6. 18. Plate boundary where two plates move away from each other.
  7. 20. an area where there is an abundance of volcanoes and earthquakes caused by the amount of movement of tectonic plates in the area.
  8. 21. Plate boundary where two plates move toward each other.
Down
  1. 1. A German scientist responsible for the hypothesis of continental drift.
  2. 3. A long, active volcano ridge system situated in the middle of an ocean basin where magma rises up and makes new crust; associated with seafloor spreading
  3. 4. The process by which one lithospheric plate moves beneath another plate as a result of tectonic forces.
  4. 5. Features that make up the earth’s surface.
  5. 6. the formation of new areas of oceanic crust, which occurs through the upwelling of magma at mid ocean ridges and its subsequent outward movement on either side.
  6. 7. The outermost layer of the Earth (lithosphere) is divided into plates that move, by convection currents, relative to each other causing continental drift, seafloor spreading and the formation of major physical features on the Earth’s surface.
  7. 8. a major fault separating blocks of the earth's surface; a rift valley
  8. 9. The layer of Earth that lies between the core and crust.
  9. 10. plate boundary where two plates move past each other in opposite directions.
  10. 12. The crust and uppermost mantle.
  11. 13. The movement of a fluid, caused by differences in temperature that transfers thermal energy from one part of the fluid to another.
  12. 15. The least dense portion of Earth’s crust.
  13. 19. a line that marks the limits of an area