Across
- 2. the extensive interval of time occupied by the geologic history of Earth
- 3. hot molten or semifluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this
- 5. are formed from pre-existing rocks or pieces of once-living organisms.
- 8. (from the Latin word for fire) form when hot, molten rock crystallizes and solidifies
- 11. careful preservation and protection of something
- 12. are Earth scientists, specialized in geophysics, who study the genesis and the propagation of seismic waves in geological materials.
- 13. The breaking down, dissolving, or changing color of rocks and minerals on the surface of the earth
- 14. an idealized cycle of processes undergone by rocks in the earth's crust, involving igneous intrusion, uplift, erosion, transportation, deposition as sedimentary rock, metamorphism, remelting, and further igneous intrusion.
- 15. an elastic wave in the earth produced by an earthquake or other means.
Down
- 1. started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form.
- 4. hot fluid or semifluid material below or within the earth's crust from which lava and other igneous rock is formed on cooling.
- 6. Convergent - tectonic plates move towards each other. Divergent - tectonic plates move apart. Transform - tectonic plates slide past each other.
- 7. the original rock from which younger rock or soil is formed.
- 9. the upper layer of earth in which plants grow, a black or dark brown material typically consisting of a mixture of organic remains, clay, and rock particles.
- 10. Hodistinct layer of soil, approximately parallel with the land surface, whose properties develop from the combined actions of living organisms and percolating wate