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 both species benefit






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






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






4. Can result in a decrease of property damage






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






6. Sex - weight - and health issues






7. A consumer that eats only animals






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






9. Moving into a population






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






11. An organism that breaks down wastes and dead organisms






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






13. The pattern of overlapping food chains in an ecosystem






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






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






16. Watering crops

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






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






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






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






21. Any substance that poses a chemical hazard






22. A nonliving part of an organism's habitat






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






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






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






26. Taking in carbon dioxide from the atmosphere during photosynthesis






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






28. One way zoos and aquariums help increase wildlife populations






29. Fires that are set by humans






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






31. Cooking oil - fuel - and medicines






32. Land that is sparsely populated and has few buildings or roads






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






34. Contamination of land - water - or air






35. The mating of animals in zoos or wildlife preserves






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






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






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






39. 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






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






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






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






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






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






45. Causes a cooling effect

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






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






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






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






50. Building up not out