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DSST Environmental Science: Land Use
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Avg score: 44% • Most missed: “Completely missing something”
DSST Environmental Science: Land Use
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25 Questions

1. There is now more nitrate in the soil and water than ever - sometimes at unsafe levels - Corn harvests have improved

2. In the last 100 years - humans have doubled the amount of organic nitrogen in the biosphere by artificial synthesis of ammonia.

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

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

5. A naturally occurring solid element or inorganic compound with a crystal structure - a specific chemical composition - and distinct physical properties.

6. Genetically engineered using recombinant DNA

7. 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

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

9. 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

10. 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

11. -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

12. 1990 Clean Air Act amendments encouraged clean-burning low-sulfur coal led to more mining in Appalachia -dumping ton of debris sinto valley degrades and destroys areas of habitat -social and health impacts. loose rock tumbles down into homes - overl

13. 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

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

15. Completely missing something

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

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

18. Combination of different pest management techniques combined in a specific way best for the place they are being used.

19. 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.

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

21. Mix the malachite with water and 6M sulfuric acid and heat the mixture - creating a transformation reaction where the only left over matter is the sand - which is then strained out. Iron fillings are then added to the solution - a substitution react

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

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

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

25. 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.

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