Across
- 1. energy type that uses naturally heated water or steam to heat buildings or drive turbogenerators
- 3. soils that contain a buildup of undecayed vegetation
- 5. soils found in wetlands
- 7. this soil horizon consists of dead organic matter
- 10. reduction in the capacity of soil to support plant life and to perform ecosystem functions
- 11. the relative proportions of each type of particle in a given soil
- 12. soils found in drylands
- 13. parent material soil horizon
- 15. an array of sun-tracking mirrors that focuses the sunlight falling on several acres of land onto a receiver mounted on a tower in the center of the area
- 17. soils of tropical and subtropical rainforests
- 20. this soil horizon is also called topsoil
- 21. accumulation of salts
- 24. diffusion of oxygen into and carbon dioxide out of the spaces in soil
- 27. an interface between the solar PV modules and the electric grid or batteries
- 28. the ease with which a soil can be cultivated
- 29. sediment particles that range from .063-.004mm in size
- 33. water and wind pick up particles of soil and carry them away
- 35. water is constantly absorbed by the roots of plants, passing up through the plant and exiting as water vapor through microscopic pores in the leaves
- 38. soil horizon characterized by the deposition of minerals that have leached from the A & E horizons
- 40. energy that can be used in the form in which they are found in nature
- 41. symbiotic relationship between roots of some plants and certain fungi
- 43. fertile, dark soils found in temperate grasslands
- 45. a solar cell
- 46. erosion of topsoil diminishes a soil’s capacity to retain water and nutrients, drylands become deserts, both ecologically and from the standpoint of agricultural production
Down
- 2. amount of work done by an electric current over a given time
- 4. energy derived from present-day photosynthesis
- 6. large numbers of animals raised in confinement facilities
- 8. widespread, moderately weathered forest soils
- 9. energy that needs to be made from primary sources
- 14. “where there are threats of serious or irreversible damage, lack of full scientific certainty shall not be used as a reason for postponing cost-effective measures to prevent environmental dedgredation”
- 16. gradual physical and chemical breakdown
- 18. sediment particles that range from 2.0-.063mm in size
- 19. soils ability to support plant growth
- 22. sediment particles finer than .004mm
- 23. horizontal gradient of soil layers
- 25. mineral material of soil
- 26. this is the eluviated soil horizon
- 30. lack of essential nutrients
- 31. fine sedimentary rock containing a mixture of solid, waxlike hydrocarbons called kerogen
- 32. transfers energy from a primary energy source to its point of use
- 34. lack of adequate food energy
- 36. packing of soil
- 37. sophisticated paddle-wheel coupled to a generator
- 39. a group of perennial plants of different species grown together that produce food or fuel
- 42. fuels derived from agricultural crops
- 44. device that turns turbine exhaust steam into water