Across
- 2. is the portion of Earths crust composed mainly of low-density siliceous
- 3. rocks that form from magma below the surface
- 4. rocks have mineral composition between those of basaltic and granitic rocks
- 8. a scientific theory that the Earths surface is made of very large sections that move very slowly
- 10. remains of species that existed on Earth for short periods of time
Down
- 1. 75% of rocks exposed at the surface are
- 5. to move toward one point and join together
- 6. is located at depths ranging from near the surface to about 150km below the surface
- 7. pumice,obsidian,scoria are examples of
- 9. Remains, imprints, traces of prehistoric organisms