EARTH SCIENCE!

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Across
  1. 1. a break in the crust
  2. 4. a super hot pool of magma; creates islands
  3. 7. type of seismic wave; passes through S,L,G
  4. 8. creates the northern and southern hemispheres
  5. 10. the reason we see different constellations
  6. 11. travels slower than the P-wave
  7. 14. the solid crust of earth
  8. 17. slope, or steepness
  9. 19. star directly above the northern axis
  10. 21. tectonic plates collide
  11. 22. lines connecting the N and S poles
  12. 23. mass/volume; the compactness of an object
  13. 24. 15 degrees per hour
Down
  1. 2. this is what the tect. plates glide above
  2. 3. location of sea floor spreading
  3. 5. tectonic plates separate
  4. 6. density x volume
  5. 9. the lowest level of earth's atmosphere
  6. 12. flatitude
  7. 13. a cyclical flow of heat due to density diffs
  8. 15. You're happy today, so you'll be happy tomorrow
  9. 16. directly above the focus, on the surface
  10. 18. the space an object occupies
  11. 20. a violent shaking of the earth