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. A living part of an organism's habitat






2. Resulted in suppression of all forest fires

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






4. Refers to an increase in Earth's average surface temperature






5. A nonliving part of an organism's habitat






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






7. This draws people from urban areas to rural areas






8. A consumer that eats both plants and animals






9. The loss of a natural habitat






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






11. A consumer that eats only animals






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






13. Any substance that poses a chemical hazard






14. Contamination of land - water - or air






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






16. A consumer that eats only plants






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






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






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






20. Burning fossil fuels






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






22. Causes a cooling effect

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23. Chemicals that causes harm to embryos and fetuses






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






25. Chemicals that cause cancer






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






27. An organism that breaks down wastes and dead organisms






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






29. 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






30. One way zoos and aquariums help increase wildlife populations






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






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






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






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






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






36. Watering crops

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






38. Manage - protect and reintroduce threatened and endangered species






39. The study of how living things interact with each other and their environment






40. The number of different species in an area






41. Habitat change and fragmentation






42. Has the highest amount of species diversity






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






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






45. A relationship between two species in which one species benefits and the other is neither helped nor harmed






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






47. The largest population that an area can support






48. Can result in a decrease of property damage






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






50. Illegal killing or removal of wildlife from their habitats