Across
- 4. the upper layer of the earth's mantle
- 5. the outermost shell of a planet
- 7. relating to earthquakes or other vibrations of the earth and its crust.
- 9. molten or semi-molten natural material from which all igneous rocks are formed
- 10. ocean but three letters
- 11. very hot, very dense center of our planet
- 14. type plates that are located beneath the ocean
Down
- 1. when the earth rumbles
- 2. big wave
- 3. large-scale processes affecting the structure of the earth's crust
- 6. study of the lands, features, inhabitants, and phenomena of Earth.
- 8. another word for oceans
- 10. when one plate goes under another
- 12. largest layer of the earth
- 13. the science that deals with the earth's physical structure and substance, its history, and the processes that act on it.