Chapter 8
Across
- 5. weathering Mechanical breakdown of rocks and minerals
- 6. rain Sulfuric acid that causes degradation of statues and marble
- 7. A vent in Earth's surface that emits ash, gases, and molten lava
- 11. Rocks formed from mud, sand, or gravel compressed together
- 13. Rocks formed from igneous or sedimentary rocks that are subjected to high temperatures and pressure that change its physical and chemical properties
- 15. Molten rock
- 16. A crack that occurs from stress in a rock
- 18. Process of one plate passing under another
- 21. spreading Creates new lithosphere and brings important elements to the surface
- 23. The outermost layer of the planet
- 25. plate When plates move toward one another and collide
- 27. Contains magma, layer under the crust
- 28. cycle Constant formation and destruction of rock
Down
- 1. Rocks formed directly from magma
- 2. The physical removal of rock fragments from an ecosystem
- 3. Exact point on the Earth's surface where the earthquake ruptured
- 4. tectonics A theory which states that "Earth's lithosphere is divided into plates, most of which are in constant motion
- 8. activity A zone where earthquakes occur
- 9. A solid chemical substance with uniform structure
- 10. Near the mantle, made up of ductile rock
- 12. weathering Breakdown of rocks and minerals by chemical reactions
- 14. fault When plates move sideways past each other
- 17. Dense large mass made up of nickel and iron
- 19. plate When plates move away form each other
- 20. spot A place where molten material from the mantle reaches the lithosphere
- 22. zone Large expanse of rock where movement has occurred
- 24. Occurs when rocks in the lithosphere rupture unexpectedly
- 25. The outermost layer of the lithosphere
- 26. scale A scale used to measure earthquake magnitude