Across
- 4. transfer or circulation of heat energy
- 5. vibrations of energy
- 7. meaning Earth
- 9. natural feature of Earth's surface
- 11. meaning ball or round
- 13. distance above sea level
- 14. imaginary line running through Greenwich England
- 15. zero degrees latitude
- 18. half of the world
- 21. an area of earthquake not receiving p waves
- 24. boundary between crust and mantle
Down
- 1. imaginary lines north and south of the equator
- 2. 180 degrees longitude
- 3. solid portion of the mantle which flows like molten plastic
- 6. outer part of Earth made up of mantle and crust
- 8. center of Earth
- 10. found between core and crust
- 12. a substance make of the elements silicon and oxygen
- 16. meaning star
- 17. solid shell of a rocky planet
- 19. scientific examination of Earth
- 20. meaning half
- 22. meaning study of
- 23. imaginary measurement spanning pole to pole