Across
- 1. the only astronomical object known to harbor life
- 3. molten or semi-molten natural material from which all igneous rocks are formed
- 5. Valley is formed on a divergent plate boundary, a crustal extension or spreading apart of the surface
- 7. the point on the earth's surface vertically above the focus of an earthquake
- 9. is a plate boundary where the motion is predominantly horizontal
- 11. is an instrument used to detect and record earthquakes
- 14. also known as a constructive boundary or an extensional boundary
- 16. kind of rock formed through the cooling and solidification of magma or lava
- 17. a concentration of heat in the mantle capable of creating magma
- 19. any break in a rock in which no significant movement has taken place
- 20. rigid sections of the lithosphere that move as a unit
Down
- 2. a mountain range extending about 1500 miles (2400 km) along the border between India and Tibet
- 4. is a geographical feature consisting of a chain of mountains or hills that form a continuous elevated crest for some distance
- 6. is a graph output by a seismograph
- 8. is an extremely thin layer of rock that makes up the outermost solid shell of our planet
- 10. A tectonic boundary where two plates are moving toward each other
- 12. is a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced to sink due to gravity into the mantle
- 13. large-scale processes affecting the structure of the earth's crust.
- 15. is any naturally occurring solid mass or aggregate of minerals or mineraloid matter
- 18. the study of the Earth