DYNAMIC PLANET VOCABULARY

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Across
  1. 3. The name of the single landmass that broke apart 225 million years ago.
  2. 7. The amount of mass in a given space.
  3. 8. The soft layer of the mantle on which the lithosphere floats.
  4. 10. The movement of energy from a warmer object to a cooler object
  5. 12. The transfer of heat by movements of a fluid.
  6. 14. A plate boundary where two plates move past each other in opposite directions.
  7. 15. The process by which molten material adds new oceanic crust to the ocean floor.
  8. 19. The movement of a fluid, cause by differences in temperature, that transfers heat from one part of the fluid to another.
  9. 21. All living things. One of the 4 spheres into which scientists divide Earth.
  10. 22. The amount of force pushing on a surface or area.
  11. 26. A plate boundary where two plates move away from each other.
  12. 28. A dense sphere of solid iron and nickel in the center of Earth.
  13. 29. A rigid layer made up of the uppermost part of the mantle and the crust. One of 4 spheres into which scientists divide Earth.
  14. 30. The layer of hot, solid material between Earth's crust and core.
  15. 31. Earth's water and ice. One of the 4 spheres into which scientists divide Earth.
Down
  1. 1. The direct transfer of energy through empty space.
  2. 2. A deep valley that forms where two plates move apart.
  3. 4. The undersea mountain chain where new ocean floor is produced; a divergent plate boundary.
  4. 5. The transfer of heat from one substance to another by direct contact of particles of matter.
  5. 6. The hypothesis that the continents slowly move across Earth's surface.
  6. 9. The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary.
  7. 11. The scientist who first introduced the idea of Continental Drift.
  8. 13. A plate boundary where two plates move toward each other.
  9. 16. The theory that pieces of Earth's lithosphere are in constant motion, driven by convection currents in the mantle.
  10. 17. The mixture of gases that surrounds Earth. The outermost of the 4 spheres into which scientists divide Earth.
  11. 18. A section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust.
  12. 19. The layer of rock that forms Earth's outer surface.
  13. 20. A system that determines the distance of an object under water by recording echoes of sound waves.
  14. 23. A vibration that travels through Earth carrying the energy released during an earthquake.
  15. 24. A break or crack in Earth's lithosphere along which the rocks move.
  16. 25. A deep valley along the ocean floor through which oceanic crust slowly sinks toward the mantle.
  17. 27. A layer of molten iron and nickel that surrounds the inner core of Earth.