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






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






3. Fires that are set by humans






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






5. Burning fossil fuels






6. 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






7. The pattern of overlapping food chains in an ecosystem






8. Cooking oil - fuel - and medicines






9. The highest level of biodiversity






10. Building up not out






11. Chemicals that causes harm to embryos and fetuses






12. Chemicals that cause cancer






13. An organism that breaks down wastes and dead organisms






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






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






16. Are carefully controlled






17. A nonliving part of an organism's habitat






18. Bumps on the roots of certain plants






19. Provide wood






20. Manage - protect and reintroduce threatened and endangered species






21. The practice of protecting the environment






22. Amount of land each person uses






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






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






25. By increasing the need for people to drive






26. A consumer that eats both plants and animals






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






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






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






30. A species that is at risk of extinction






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






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






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






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






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






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






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






38. Help improve the standard of living for residents






39. Using public transportation






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






41. Has the highest amount of species diversity






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






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






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






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






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






47. An organism that can make its own food






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






49. A consumer that eats only animals






50. This draws people from urban areas to rural areas