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






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






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






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






5. A consumer that eats only plants






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






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






8. The pattern of overlapping food chains in an ecosystem






9. A nonliving part of an organism's habitat






10. Provide wood






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






12. Amount of land each person uses






13. 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






14. The mating of animals in zoos or wildlife preserves






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






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






17. Are carefully controlled






18. Making direct measurements






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






20. Burning fossil fuels






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






22. Causes a cooling effect

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






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






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






26. A natural resource that is not replaced in a useful time frame






27. Increase the stability of an ecosystem






28. An amount of a renewable resource that can be harvested regularly without reducing the future supply






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






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






31. Help improve the standard of living for residents






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






33. Manage - protect and reintroduce threatened and endangered species






34. Chemicals that cause cancer






35. Shift of population from countryside to cities






36. A living part of an organism's habitat






37. By increasing the need for people to drive






38. Moving into a population






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






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






41. Have a greater sensitivity to environmental hazards than any other group






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






43. Can result in a decrease of property damage






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






45. The largest population that an area can support






46. The highest level of biodiversity






47. Watering crops

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






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






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