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






2. Bumps on the roots of certain plants






3. A consumer that eats only plants






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






5. The number of different species in an area






6. When fish are caught faster than they can breed - causing the populatio to decrease






7. Anything in the environment that is used by people is called a natural resource






8. Any substance that poses a chemical hazard






9. The disappearance of all members of a species from Earth






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






11. Illegal killing or removal of wildlife from their habitats






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






13. The breaking of a habitat into smaller - isolated pieces






14. The largest population that an area can support






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






16. Causes a cooling effect

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






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






19. An organism that breaks down wastes and dead organisms






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






21. Deals with biological hazards






22. A relationship in which one organism lives on or in a host and harms it






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






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






25. Land that is sparsely populated and has few buildings or roads






26. Manage - protect and reintroduce threatened and endangered species






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






28. By increasing the need for people to drive






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






30. The form of transportation that uses the most energy per passenger mile






31. The most direct way in which biodiverstiy can provide a source of income






32. Has the highest amount of species diversity






33. An example of a method for managing whole ecosystems and habitats






34. A natural pattern in which species diversity generally increases toward the equator






35. Increase the stability of an ecosystem






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






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






38. The pattern of overlapping food chains in an ecosystem






39. The loss of a natural habitat






40. Sex - weight - and health issues






41. The organism that does the killing in a predation interaction






42. Building up not out






43. An organism that can make its own food






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






45. Moving into a population






46. Chemical hazard that was once found in paint - young children are frequently tested for this






47. A resource that is either always available or is naturally replaced in a relatively short time






48. A behavior or physical characteristic that allows an organism to live successfully in its environment






49. Amount of land each person uses






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