Crossword Puzzle Study Tool

3. Is the physical breaking down rock.
6. The study of minerals.
7. Fastest shock waves traveling through solid, liquid and gas.
9. Changes in population structures that occur at boundary of two habitats.
11. Plastic layer(weak); hottest region of mantle.
13. In desserts, a torrent of water that fills a stream channel during or just after a rainstorm.
14. Take over niches already occupied by native species.
16. Both Limited by extreme conditions(cold or hot), supporting low flora, fauna diversity.
18. A type of eruption with low viscosity, high volume, quiet.
19. Water gets into cracks, freezes and expands to break rock.

1. A weak point in the tectonic plate where pressure form beneath the surface burst through; break in Earth's crust.
2. Is the breakdown of minerals, always in presence of water.
4. Builds mid ocean ridges and drive continental movement.
5. Measures ground tilt rotation near faults caused by fault slip and volcanic uplift, installed into boreholes.
7. The theory that Earth's lithosphere is fractured into huge plates.
8. In fluvial systems is the process by which water dislodges, dissolves, or removes weather surface material.
10. Channel erodes.
12. Boundary zones between different but adjoining ecosystems.
15. Decomposition of compounds by reactions with water.
17. The level or nearly level depositional plain that forms at the mouth of a river.