Across
- 4. Resources that can be replaced are ____
- 6. Resources that can NOT be replaced are ___
- 8. The center of the earth
- 10. Study of Space
- 14. Secondary seismic wave
- 15. Study of water
Down
- 1. Study of weather
- 2. Middle layer of Earth
- 3. Main energy source
- 5. Outermost layer of Earth
- 7. Fastest seismic wave
- 9. Distance from East to West
- 11. Study of the Earth
- 12. Distance from North to South
- 13. Study of life