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 nonliving part of an organism's habitat






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






3. Pollution from a factory near your school






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






5. Burning fossil fuels






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






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






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






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






10. The largest population that an area can support






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






12. Taking in carbon dioxide from the atmosphere during photosynthesis






13. A species that is at risk of extinction






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






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






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






17. A close relationship between two species that benefits at least one of the species






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






19. Chemicals that causes harm to embryos and fetuses






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






21. Increase the stability of an ecosystem






22. Illegal killing or removal of wildlife from their habitats






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






24. Leaving a population






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






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






27. The organism that does the killing in a predation interaction






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






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






30. Organism that carries pathogens






31. Amount of land each person uses






32. A living part of an organism's habitat






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






34. The struggle between organisms to survive as they attempt to use the same limited resource






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






36. Help improve the standard of living for residents






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






38. A consumer that eats both plants and animals






39. Causes a cooling effect


40. A consumer that eats only animals






41. The number of different species in an area






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






43. An organism that breaks down wastes and dead organisms






44. Chemicals that cause cancer






45. Habitat change and fragmentation






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






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






48. The amount of carbon dioxide emissions for which an individual or group is responsible






49. The practice of protecting the environment






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