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 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






2. A living part of an organism's habitat






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






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






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






6. Watering crops

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7. Chemicals that cause cancer






8. Manage - protect and reintroduce threatened and endangered species






9. Building up not out






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






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






12. Moving into a population






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






14. The mating of animals in zoos or wildlife preserves






15. The highest level of biodiversity






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






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






18. A consumer that eats only plants






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






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






21. Are carefully controlled






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






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






24. The loss of a natural habitat






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






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






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






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






29. An organism that breaks down wastes and dead organisms






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






31. Shift of population from countryside to cities






32. The study of how living things interact with each other and their environment






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






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






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






36. Rising sea level






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






38. Illegal killing or removal of wildlife from their habitats






39. Causes a cooling effect

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40. Leaving a population






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






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






43. Bumps on the roots of certain plants






44. Chemicals that causes harm to embryos and fetuses






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






46. A species that is at risk of extinction






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






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






49. The largest population that an area can support






50. Organism that carries pathogens