Across
- 2. Layer beneath the crust made out of dense iron minerals
- 5. Study of how living things interact with each other
- 8. Solid part of the Earth's surface that consists completely of rock, sediments, and minerals
- 12. Integrated system related to water
- 13. 1,228 km thick
- 14. Integrated system related to air
- 15. Has a 3,400 km radius
- 17. Preexisting rock that was subjected to high temperature or pressure
- 18. Metal found in the outer and inner core
- 20. Countries with higher population and lower average wealth
Down
- 1. Releases ash which lowers the temperature of the Earth
- 3. Second metal found in the outer and inner core
- 4. Lower layer of the mantle
- 6. Plates Glide on water like ice
- 7. Cool rigid outermost layer of the Earth
- 9. Vibrations of the ground caused by pressure built up in breaks of the crust
- 10. Type of rock formed by the solidification of lava or magma
- 11. Gradual attrition caused by wind or water
- 16. Definition of "litho"
- 19. Example of a sedimentary rock