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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 virus or bacterium (organisms) that cause infectious diseases






2. Chemicals that cause cancer






3. Taking in carbon dioxide from the atmosphere during photosynthesis






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






5. Cooking oil - fuel - and medicines






6. Making direct measurements






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






8. This draws people from urban areas to rural areas






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






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






11. A consumer that eats only animals






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






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






14. A form of decision-making concerned with the allocation and conservation of natural resources






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






16. An organism that is killed and eaten by another organism






17. Global phenomenon that has caused some organisms to move toward the poles and to higher altitude






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






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






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






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






22. The loss of a natural habitat






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






24. Increase the stability of an ecosystem






25. A resource that is either always available or is naturally replaced in a relatively short time






26. A consumer that eats only plants






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






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






29. Are carefully controlled






30. Organism that carries pathogens






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






32. Watering crops

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






34. Building up not out






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






36. Chemicals that causes harm to embryos and fetuses






37. A species that is at risk of extinction






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






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






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






41. An organism that breaks down wastes and dead organisms






42. Any substance that poses a chemical hazard






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






44. Amount of land each person uses






45. Habitat change and fragmentation






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






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






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






49. By increasing the need for people to drive






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






Can you answer 50 questions in 15 minutes?



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