Earth and Plate Tectonics

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Across
  1. 1. made up of iron and nickel.
  2. 2. Theory that explains how continents shift position on the earth's surface
  3. 4. hard layer on the outer most part of the earth.
  4. 7. When oceanic crust is formed from volcanic activity and gradually moves away from the ridge.
  5. 11. Theory that the earth's outer shell is divided into several plates that glide over earth's mantle.
  6. 12. Waves of energy caused by sudden breaking of rock within the earth or explosion.
  7. 13. Move through the body of an object unlike surface waves.
  8. 14. region of the upper part of the earth's mantle.
Down
  1. 1. a current in a fluid that results from convection.
  2. 3. region surrounding the earth.
  3. 5. Crust, mantle, Convection currents, Outer core, inner core
  4. 6. rigid outer part of the earth.
  5. 8. Supercontinent that eventually split up in the the continents we know today.
  6. 9. largest part of the earth that takes up 84% of the earth's total volume.
  7. 10. First waves of an earthquake that arrive on the seismograph.