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DSST Environmental Science: Land Use

Subjects : dsst, science
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. There is now more nitrate in the soil and water than ever - sometimes at unsafe levels - Corn harvests have improved






2. Having not enough of something






3. Organic macromolecules hardest to provide during a famine






4. A variation of clear-cutting in which a strip of trees is clear-cut along the contour of the land - with the corridor narrow enough to allow natural regeneration within a few years. After regeneration - another strip is cut above the first - and so o






5. Systematically tests different approaches and aims to improve methods and find ideal over time - Advantages: can be highly effective; works with each specific environment; can protect species; can provide minimum impact - Disadvantages: difficult to






6. Do not naturally occur in the environment - but are synthesized by man. Since all these compounds have carbon and hydrogen atoms as the basis of their molecule (as do living plants and animals) - they are referred to as organic compounds to form pest






7. Completely missing something






8. Not enough of some vitamin/mineral/essential thing in food






9. Locally-based socio-economic model of agriculture and food distribution. also refers to a particular network or association of individuals who have pledged to support one or more local farms - with growers and consumers sharing the risks and benefits






10. When sulfide minerals in newly exposed rock surfaces react with oxygen and rainwater to produce sulfuric acid - causing runoff as it leaches metals from the rocks






11. Made by mixing the remains or wastes of organisms including animal manure (essential) - crop residues - fresh vegetation - and compost






12. Choosing valuable trees only - lots of reseeding - transportation is hard.






13. To reclaim is to make things level - and to get something growing and prevent erosion - If the U.S were to try to reclaim - it would cost tax payers about 2 trillion dollars.






14. way to enhance nutrient-limited soils - Inorganic fertilizers- mined or synthetically manufactured mineral supplements - Organic fertilizers consist of the remains or wastes of organisms that include animal mancure - organic fertilizers can improve






15. A single piece of land gardened collectively by a group of people.






16. More expensive then clear cutting - leaves rows of trees for reseeding/ future harvesting.






17. Maximum Sustainable Yield - Ecosystem-based Management - Adaptive Management






18. Advantages: removes the least amount of unwanted material so less waste - Disadvantages: potential collapse; sinkholes; acid drainage; pollutes groundwater; risk of injury/death from dynamite blasts - natural gas explosions - inhalation of toxic gass






19. Makes money - remove resources from its original location - Firewood - Paper - Lumber - Charocoal - Gem - Hunting - Medicine






20. Heating ore beyond its melting point and combining it with other metals or chemicals ( process of separating).






21. Worthless material that surrounds a wanted mineral in an ore deposit.






22. Cheapest - easiest transportation removal of lumber - Most environmentally harmful - takes all trees - leaves nothing






23. Harvesting only mature trees of certain species and size; usually more expensive then clear-cutting but it is less disruptive for wildlife and often better for forest regeneration






24. Fertilizers - promote plant growth by providing essential nutrients like nitrogen or phosphorus; increases crop yield - Combines/Machinery - allows farmers to work much faster and more efficiently; increases crop yield - Pesticides - kill insects - p






25. A severe shortage of food (as through crop failure) resulting in violent hunger and starvation and death






26. (Insecticides - Herbicides/ Fungicides) - Artificial chemicals used to kill pests/ insects/plants/fungi






27. Nicotine - Alcohol - Cocaine - if it can kill you - it can kill other living things.






28. Completely missing something acquired from food; usually protein or vitamin C






29. One farmer=100 eaters.






30. Food assistance given to an area. Can take away the incentive to produce food in that area. Distribution is an issue.






31. Malachite contains sulfides which become strongly acidic when mixed with water and thus pollutes water






32. Mining method- mining underground coal deposits - in which shafts are dug deeply into the ground and networks of tunnels are dug to follow coal seams.






33. A mineral or grouping of minerals from which we extract metals - most metals are found in ore - Copper - iron - lead gold - and aluminum - Used in electronic components of computers - cell phones - DVD players.






34. Shafts are excavated deep into the ground - and networks of tunnels are dug or blasted out to follow deposits of the mineral. requires removal of the overburden - Used for metals ( zinc - lead - nickel - tin - gold - copper) and coal - Most dangerous






35. Natural fertilizers from decomposing solid organic matter; have lots of nitrogen






36. A fossil fuel composed of organic matter that was compressed under very high pressure to form a dense - solid carbon structure.






37. Clear cutting - Strip cutting - selective cutting






38. Technology that has vastly increased the amount of food production since the agricultural revolution; currently 1 farmer for every 129 eaters






39. Genetically engineered using recombinant DNA






40. -boosts yields by intensifying irrigation and introducing synthetic fertilizers - while the advent of chemical pesticides reduce competition from weeds and herbivory by crop pests - Industrial agriculture works best under the condition of monoculture






41. Cutting the trees down - burning them. Nutrients from the ash go to soil. You have a farmland for ranching cattle or farming soybeans.






42. Controversial logging practice where all trees in an area are uniformly cut down - used by foresters to create certain types of forest ecosystems and to promote select species that requires an abudnace of sunlight or grow in large - even--age stands






43. Corn yield has increased dramatically in the US since the 1920s because it was in the 1920s that GM corn started to be developed






44. The golden molecule for plants because it makes them grow - Leagues have special nitrogen fixing bacteria in their rhizomes (roots) - Three covalent bonds for N2. Stronger the covalent bonds - the harder it is to react. Nitrogen gas is inert.






45. Solid waste from smelts






46. The surface soil that must be moved away to get at coal seams and mineral deposits






47. Uses the idea that 'the enemy of one's enemy is one's friend' - Battles pests and weeds with organisms that eat or infect them - Can be extremely effective and inexpensive






48. Strip mining - open pit mining - mountain top removal






49. Educational - Maintain biodiversity - Aesthetics - Oxygen - Improve quality of life - Co2 to O2 - Shade - Habitat/ biodiversity - Erosion - Clean water - Soil enrichment






50. Technology was not able to profitably remove the copper from the malachite