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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 series of changes that occur in an area where the ecosystem has been disturbed - but where soil and organisms still exist






2. The practice of protecting the environment






3. An organism that can make its own food






4. Are carefully controlled






5. A consumer that eats only animals






6. Chemicals that cause cancer






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






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






9. The loss of a natural habitat






10. Businesses are arranged in a long row along a roadway - with no main community






11. Chemicals that causes harm to embryos and fetuses






12. Causes a cooling effect

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13. A group of land ecosystems with similar climates and organisms






14. A consumer that eats only plants






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






16. The number of different species in an area






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






18. A relationship between two species in which both species benefit






19. Contamination of land - water - or air






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






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






22. A nonliving part of an organism's habitat






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






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






25. The role of an organism in its habitat - or how it makes its living






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






27. A series of events in which one organism eats another and obtains energy






28. Loud noises in the air like jack hammers - loud car stereos - etc...






29. Any substance that poses a chemical hazard






30. Sikhote-Alin mountains and the Siberian tigers living there are separated from other mountains by this






31. An organism that is killed and eaten by another organism






32. A natural resource that is not replaced in a useful time frame






33. The pattern of overlapping food chains in an ecosystem






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






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






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






37. Building up not out






38. Help improve the standard of living for residents






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






40. Making direct measurements






41. Organism that carries pathogens






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






43. A species that could become endangered in the near future






44. Watering crops

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45. Habitat change and fragmentation






46. An organism that breaks down wastes and dead organisms






47. Manage - protect and reintroduce threatened and endangered species






48. A species that influences the survival of many others in an ecosystem






49. A region that has many different types of organism is described as having a high level of this






50. Sex - weight - and health issues