Across
- 2. Rocks that form on the surface of the Earth.
- 5. Rock that has no crystal structure and forms from extremely rapid cooling of lava.
- 6. Black or dark gray, fine-grained rock called that forms from the cooling of lava and is composed of only dark-colored minerals.
- 8. Molten rock that flows out onto the surface.
- 9. An element combined with oxygen.
- 11. One of Earth's "shells" that makes up about two-thirds of Earth’s total mass.
- 14. Rock that forms from the rapid cooling of frothy, gas-rich molten material.
- 15. Rocks formed by the cooling and solidification of molten rock.
- 16. Minerals may occur in nature as discrete elements.
- 17. Mineral family that combine the two most abundant chemical elements in the lithosphere: oxygen and silicon.
Down
- 1. Narrow zone of change in mineral composition at the base of the crust.
- 3. Earth’s outermost shell.
- 4. Element composed of one or more elements in combination with carbon and oxygen.
- 7. Composed of reduced sulfur in some combination with one or more other elements.
- 10. The innermost portion of Earth.
- 12. Tiny pieces of solid volcanic rock.
- 13. Rocks that cool and solidify beneath Earth’s surface.