Across
- 2. a fluid layer about 2,400 km (1,500 mi) thick
- 3. the outermost shell of a terrestrial planet
- 4. Fe
- 5. a layer of silicate rock between the crust and the outer core
- 7. elastic wave in the earth produced by an earthquake
- 8. Ni
Down
- 1. coarse-grained intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase
- 3. the movement caused within a fluid by the tendency of hotter and therefore less dense material
- 5. The molten or semi-molten natural material from which all igneous rocks are formed
- 6. innermost geologic layer of the planet Earth