Science

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Across
  1. 4. – When one tectonic plate sinks below another
  2. 7. boundaries – Places where plates slide past each other
  3. 11. valley – A deep valley formed where plates pull apart
  4. 13. – The spinning of Earth on its axis, causing day and night
  5. 14. Wegener – Scientist who proposed the idea of continental drift
  6. 15. drift – The theory that continents slowly move over Earth’s surface
  7. 16. – A low area of land where water often collects
Down
  1. 1. – When Earth is tilted most toward or away from the Sun
  2. 2. Ridge – Long underwater mountain chain formed at a divergent boundary
  3. 3. – Openings in Earth’s crust that erupt lava, ash, and gases
  4. 4. – A division of the year caused by Earth’s tilt and its orbit
  5. 5. boundaries – Places where tectonic plates move apart
  6. 6. – Places where magma rises in the middle of a plate
  7. 8. – Landforms created when Earth’s crust is pushed upward
  8. 9. – When day and night are about equal in length
  9. 10. – Earth’s year-long orbit around the Sun
  10. 12. – The 23.5° angle of Earth’s axis