Astronomy Test #1

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Across
  1. 2. The time from noon until noon (average 24 hours)
  2. 5. Boundary between the crust and upper mantle
  3. 8. Iron in the outer core creates an electric current that produces this type of field that protects the Earth
  4. 10. December 21st; shortest day of the year
  5. 12. Compressional waves that travel through the Earth
  6. 14. The separation of Earth into layers of different densities toward the center
  7. 15. Area of molten rock and metal just beneath the Lithosphere
Down
  1. 1. The point in which Earth's orbit is furthest from the Sun
  2. 2. June 21st; the longest day of the year
  3. 3. (meridians), travels north to south, 0 degrees to 180 degrees, east or west, 0 degree prime meridian that runs through Greenwich, England
  4. 4. The time needed for the Earth to rotate relative to the stars being in the same position again
  5. 6. The point in which Earth's orbit is closest to the Sun
  6. 7. The bending of waves as they pass from a material of one density to a material of a different density
  7. 9. Transverse waves that travel through the Earth
  8. 11. (parallels), travels east to west, 0 degrees to 90 degrees north to south, 0 degrees at the equator
  9. 13. Consists of the crust and the top part of the mantle