Across
- 1. Fossil fuel that forms when dead plant matter is converted into peat
- 3. Taj Mahal is made of this rock
- 4. Igneous rock that floats on water
- 8. solid material whose constituents are arranged in a highly ordered microscopic structure
- 9. Hot liquid rock that lies below earth's surface
- 10. Scientists who study rocks
Down
- 1. One form of lime stone
- 2. Inexhaustible source of energy
- 5. Made of sand stone
- 6. Most valuable gem stone
- 7. Used to carve Mount Rushmore
- 11. Blackboards are made from this