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. The disappearance of all members of a species from Earth






3. Building up not out






4. Increase the stability of an ecosystem






5. A large area heavily populated like Miami - Florida or Toledo - Ohio






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






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






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






9. Illegal killing or removal of wildlife from their habitats






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






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






12. Making direct measurements






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






14. Deals with biological hazards






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






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






17. A living part of an organism's habitat






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






19. A species that is at risk of extinction






20. This draws people from urban areas to rural areas






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






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






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






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






25. A consumer that eats both plants and animals






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






27. Bumps on the roots of certain plants






28. The highest level of biodiversity






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






30. By increasing the need for people to drive






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






32. Any substance that poses a chemical hazard






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






34. A species in danger of becoming extinct in the near future






35. Chemicals that causes harm to embryos and fetuses






36. Has the highest amount of species diversity






37. Cooking oil - fuel - and medicines






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






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






40. A nonliving part of an organism's habitat






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






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






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






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






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






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






47. The process of cutting down only some trees in an area






48. Water vapor and carbon dioxide that trap heat near the earth






49. The loss of a natural habitat






50. An organism that breaks down wastes and dead organisms