Test your basic knowledge |

DSST Environmental Science - 2

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. Deals with biological hazards






2. Species that are carried to a new location by people






3. Illegal killing or removal of wildlife from their habitats






4. A form of decision-making concerned with the allocation and conservation of natural resources






5. The number of different species in an area






6. The disappearance of a particular population from a given area - but not from the entire species globally






7. A consumer that eats only animals






8. The process of changing free nitrogen gas into a usable form






9. Energy from the sun would be reflected back into space






10. Viruses - bacteria and other organisms in the environment that harm human health






11. The most effective way of preserving biodiversity by protecting whole ecosystems






12. Trees - grass - crops - wetlands - water - building and pavements






13. A disease that has appeared in the human population for the first time or that has existed for a while but is increasing rapidly and spreading around the world






14. The highest level of biodiversity






15. The process of cutting down all the trees in an area at once






16. An organism that obtains energy by feeding on the other organisms






17. The reason why tigers living in warmer climates have thinner fur than tigers living in cool climates






18. Using public transportation






19. Plan to establish an 8000 kilometer long strip of land to rejoin fragments of tiger habitat






20. Contamination of land - water - or air






21. Global phenomenon that has caused some organisms to move toward the poles and to higher altitude






22. The series of changes that occur in an area where no soil or organisms exist






23. A group of organisms that are physically similar and can mate with each other and produce offspring that can also mate and reproduce






24. The probability that a hazard will cause a harmful response






25. All the members of one species in a particular area






26. A virus or bacterium (organisms) that cause infectious diseases






27. The pattern of overlapping food chains in an ecosystem






28. Transportation systems - communications systems - water services - power supplies - and schools






29. The largest population that an area can support






30. A carnivore that feeds on the bodies of dead organisms






31. Organism that carries pathogens






32. The study of the natural processes that occur in the environment and how humans can affect them






33. A nonliving part of an organism's habitat






34. This draws people from urban areas to rural areas






35. Increase the stability of an ecosystem






36. The clearing of a forest and replacing it with another land use






37. Taking in carbon dioxide from the atmosphere during photosynthesis






38. The amount of carbon dioxide emissions for which an individual or group is responsible






39. Building up not out






40. Chemicals that cause cancer






41. Amount of land each person uses






42. The amount of replacement is equal to the amount harvested






43. Watering crops


44. Concentrations of toxicants can be greatly multiplied with each step up the food chain






45. Soil - fresh water - wild animals - and timber






46. Can result in a decrease of property damage






47. One way zoos and aquariums help increase wildlife populations






48. The struggle between organisms to survive as they attempt to use the same limited resource






49. Help improve the standard of living for residents






50. An area with a large population of valuable ocean organisms