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. Species that are carried to a new location by people






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






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






4. Are carefully controlled






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






6. A living part of an organism's habitat






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






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






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






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






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






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






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






14. Contamination of land - water - or air






15. Sex - weight - and health issues






16. The pattern of overlapping food chains in an ecosystem






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






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






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






20. One way zoos and aquariums help increase wildlife populations






21. 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






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






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






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






25. Cooking oil - fuel - and medicines






26. Organism that carries pathogens






27. The number of different species in an area






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






29. Burning fossil fuels






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






31. Increase the stability of an ecosystem






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






33. Taking in carbon dioxide from the atmosphere during photosynthesis






34. Habitat change and fragmentation






35. By increasing the need for people to drive






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






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






38. An organism that can make its own food






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






40. A consumer that eats only animals






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






42. A consumer that eats both plants and animals






43. A relationship between two species in which both species benefit






44. The mating of animals in zoos or wildlife preserves






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






46. Has the highest amount of species diversity






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






48. The highest level of biodiversity






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






50. An organism that breaks down wastes and dead organisms