2. a) San Andreas b) San Jacinto c) Garlock d) Imperial

3. a) CO2 b) Nitrogen c) Oxygen d) Water vapor

4. a) Air pressure b) Temperature c) Nitrogen and oxygen concentration d) Ozone concentration

5. a) Ozone b) Pressure c) Clouds d) gravity

6. a) Temperature conversion b) Temperature inversion c) Thermal conversion d) Thermal convection

7. a) Bacteria in the roots of legumes b) Respiration c) Decomposition of proteins in the soil d) photosynthesis

8. a) Coal, oil, and natural gas b) Dissolved carbon dioxide, bicarbonate, carbonate ions c) Organic molecules and fossil fuels d) Simple sugars, carbon dioxide, and methane gas

9. a) Cementing of sediments underground b) Compression of rock in mountain building c) Cooling of magma underground d) Cooling of lava above ground

10. a) Cementing sediments underground b) Compression of rock in mountain building c) Cooling o magma underground d) Cooling of lave above ground

11. a) Intrusive and extrusive b) Erosion and compaction c) Cementation and compaction d) Clastic and chemical

12. a) Characteristics of living organisms on the seafloor b) Patterns of magnetic fields on the seafloor c) The relatively young age of the seafloor d) Topographical features on the seafloor

13. a) Convergent boundary b) Transform boundary c) Divergent boundary d) Major plate

14. a) Flexible rebound hypothesis b) Regressing recoil hypothesis c) Recovering rock hypothesis d) Elastic rebound hypothesis

15. a) Epicenter b) Fault c) Fracture d) Focus

16. a) The lowering of aquifer levels b) The interaction of tides with the coast c) Mining activity in the nineteenth century d) Plates moving past each other along active faults

17. a) Lava type and height b) Lava type and shape c) Eruption frequency and height d) Eruption frequency and shape

18. a) Northern and western b) Northern and eastern c) Central and western d) Eastern and southern

19. a) Sea floor spreading b) Underwater volcanoes c) Erosion of ocean ridges d) Deep sea thermal venting