Chapter 4 Earth's Structure

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Across
  1. 5. partially molten layer, allows tectonic plates to move
  2. 6. Earth's point farthest from the Sun
  3. 8. middle layer, rigid due to pressure
  4. 9. 24 hour period, spinning of Earth around its axis
  5. 11. constructed a pendulum that gave evidence to Earth's rotation
  6. 13. A apparent shift in position of near by stars when compared to distance stars
  7. 14. maximum tilt toward the sun
  8. 15. rotating cloud of gas and dust contracted to for the Sun and Planets
  9. 16. daytime and nighttime are equal in length all over the world
Down
  1. 1. created when charged particles from space cascade down through the Earth’s atmosphere
  2. 2. Rigid layer divided into continental and oceanic
  3. 3. Process where gas or liquid is heated, expands and rises
  4. 4. Earth is divided into 24 worldwide, each at 15 degrees
  5. 7. A traveler crossing this line either gains or loses a day
  6. 10. molten iron layer that creates magnetic field
  7. 12. causes a compass needle points northward
  8. 13. Earth's nearest point to the Sun