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






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






3. The practice of protecting the environment






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






5. An organism that can make its own food






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






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






8. Contamination of land - water - or air






9. An environment that provides the things an organism needs to live - grow - and reproduce






10. Provide wood






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






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






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






14. One way zoos and aquariums help increase wildlife populations






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






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






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






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






19. Chemicals that causes harm to embryos and fetuses






20. Causes a cooling effect


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






22. Help improve the standard of living for residents






23. 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






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






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






26. Watering crops


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






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






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






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






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






32. The loss of a natural habitat






33. Manage - protect and reintroduce threatened and endangered species






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






35. A close relationship between two species that benefits at least one of the species






36. Process of measuring the chance that an environmental hazard will cause harm






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






38. Has the highest amount of species diversity






39. Are carefully controlled






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






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






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






43. Any substance that poses a chemical hazard






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






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






46. A species that is at risk of extinction






47. The pattern of overlapping food chains in an ecosystem






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






49. Pollution from a factory near your school






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