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 virus or bacterium (organisms) that cause infectious diseases






2. Energy from the sun would be reflected back into space






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






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






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






6. Causes a cooling effect

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7. The number of different species in an area






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






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






10. Bumps on the roots of certain plants






11. Increase the stability of an ecosystem






12. Pollution from a factory near your school






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






14. An organism that can make its own food






15. A consumer that eats both plants and animals






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






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






18. Sex - weight - and health issues






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






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






21. The largest population that an area can support






22. A nonliving part of an organism's habitat






23. The practice of protecting the environment






24. Taking in carbon dioxide from the atmosphere during photosynthesis






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






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






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






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






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






30. Contamination of land - water - or air






31. A consumer that eats only plants






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






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






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






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






36. Help improve the standard of living for residents






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






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






39. Leaving a population






40. This draws people from urban areas to rural areas






41. Manage - protect and reintroduce threatened and endangered species






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






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






44. Watering crops

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45. Chemicals that cause cancer






46. Are carefully controlled






47. Making direct measurements






48. Any substance that poses a chemical hazard






49. Cooking oil - fuel - and medicines






50. The mating of animals in zoos or wildlife preserves