Across
- 4. use convection currents to move on the asthenosphere
- 5. two plates coming together
- 8. outer layer of the earth under the continents
- 12. two plates separating
- 13. the portion of the earth between the crust and the core
- 16. difference between high and low elevations
- 17. atmosphere layer that includes the ozone layer
- 18. model of earth's surface using contour lines
- 19. magma like liquid layer under the mantle
- 20. gaseous envelope surrounding the earth
Down
- 1. the outer shell of the earth
- 2. a solid sphere in the middle of the fluid core
- 3. how plates move on the asthenosphere
- 6. outer layer of the earth under the oceans
- 7. plastic-like layer plates move on
- 9. lateral movement of the continents
- 10. supercontinent of 200 million years ago
- 11. sliding plates
- 14. atmosphere layer above the stratosphere layer
- 15. lowest layer of the atmosphere