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 no soil or organisms exist






2. Taking in carbon dioxide from the atmosphere during photosynthesis






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






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






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






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






7. A species that is at risk of extinction






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






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






10. Increase the stability of an ecosystem






11. Any substance that poses a chemical hazard






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






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






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






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






16. Are carefully controlled






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






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






19. An organism that obtains energy by feeding on the other organisms






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






21. Rising sea level






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






23. A consumer that eats only plants






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






25. By increasing the need for people to drive






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






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






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






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






30. The mating of animals in zoos or wildlife preserves






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






32. One way zoos and aquariums help increase wildlife populations






33. Help improve the standard of living for residents






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






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






36. The highest level of biodiversity






37. Making direct measurements






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






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






40. Businesses are arranged in a long row along a roadway - with no main community






41. Burning fossil fuels






42. Shift of population from countryside to cities






43. Illegal killing or removal of wildlife from their habitats






44. Relieving a nation from repaying some of the money it owes other nations in exchange for protecting its biodiversity






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






46. The number of different species in an area






47. 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






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






49. Cooking oil - fuel - and medicines






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