Earth's Structure

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Across
  1. 2. the movement of a fluid, caused by differences in temperature, that transfers heat from one part of the fluid to another
  2. 4. the formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges and its subsequent outward movement on either side
  3. 6. An undersea mountain chain where new ocean floor is produced; a divergent plate boundary.
  4. 8. thinner, more dense, younger crust making ocean floor
  5. 13. the degree of compactness of a substance; the inner core having the highest degree
  6. 14. A dense sphere of solid iron and nickel at the center of Earth
  7. 15. the solid, outer layer of the earth that consists of the crust and the rigid upper part of the mantle
  8. 16. The layer of hot, solid material between Earth's crust and core.
  9. 18. third/last layer of the mantle,rock flows slower here than in the asthenosphere,reaches all the way down until we reach the Earth's core
  10. 19. A tectonic plate boundary where two plates collide, come together, or crash into each other.
  11. 20. The thin and solid outermost layer of the Earth above the mantle
  12. 21. theory that Earth's lithosphere is divided into tectonic plates-these tectonic plates move slowly on top of the asthenosphere
  13. 24. the region where two tectonic plates are in contact
  14. 25. when materials begin to separate from one another
Down
  1. 1. The boundary between tectonic plates that are sliding past each other horizontally
  2. 3. The portion of the earth's crust that primarily contains granite, is less dense than oceanic crust, and is 20-50 km thick
  3. 5. the region where an oceanic plate sinks down into the asthenosphere at a convergent boundary, usually between continental and oceanic plates
  4. 7. The soft layer of the mantle on which the lithosphere floats.
  5. 9. an event that causes a magnetic field to reverse direction
  6. 10. where warmer and less dense mantle is rising
  7. 11. A plate boundary where two plates move away from each other.
  8. 12. A layer of liquid molten iron and nickel that surrounds the inner core of Earth
  9. 16. where cooler and denser mantle is sinking
  10. 17. The hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations
  11. 22. a growth in size; an increase in amount
  12. 23. A supercontinent containing all of Earth's land that existed about 225 million years ago.