Across
- 4. The light reflecting properties of a mineral.
- 5. The tendency of a mineral to break with rough or jagged surfaces.
- 11. Loose material such as bits of rocks, minerals and plant and animal remains.
- 12. The dark-colored part of soil that is rich in nutrients, such as nitrogen, phosphorus, potassium, and sulphur.
- 14. A principle or law stating that within a sequence of undisturbed sedimentary rocks, the oldest layers are on the bottom and the youngest on the top.
- 15. The middle layer of the Earth, often divided into two parts; upper and lower.
- 16. The process by which sedimentary rock is formed from sediment, through weight and pressure.
- 18. The name of the second supercontinent thought to have existed approximately 350 million years ago and to have included all the present continents.
Down
- 1. A heavy, almost solid form of petroleum.
- 2. An inorganic, naturally occurring solid material which may be either an element or a compound.
- 3. A downfold of a rock layer in mountain formation.
- 6. The arrangement of sedimentary rock into visible layers.
- 7. An upfold of rock layers in mountain formation.
- 8. The process by which materials from soil are dissolved and carried away by water.
- 9. A sensitive machine that is attached to bedrock in order to measure the strength of earthquakes.
- 10. The place deep in the crust where the earthquake begins.
- 13. The process of moving soil and rock from one place to another.
- 14. The color of a mineral in powered form.
- 17. The tendency of a mineral to break along a smooth flat surface.