Across
- 2. the study of earth.
- 5. belief that earth-forming processes are natural, have always been the same, and have always happened at the same gradual rate.
- 8. any raw material from the natural environment that we use or can use.
- 9. the combination of the upper mantle and the crust that moves with tectonic plates.
- 10. the boundary between the earth’s crust and it’s mantle.
- 11. dense extremely hot central region of the earth’s interior, consisting of two parts: a liquid outer core and a solid inner core.
- 12. a natural resource that can’t be replenished and so is simply used up, and needs to be conserved.
Down
- 1. idea that the earth is billions of years old and is a secular approach to the history of geology.
- 3. the hot, plastic rock that fills the earth’s interior between the crust and the core which makes up 84% by volume.
- 4. a natural resource that has an unlimited supply or is easily replenished.
- 6. efforts to oversee and wisely control the use of natural resoures.
- 7. the earth’s solid, relatively low density outermost layers of rock that lies under the loose surface materials and oceans.