Test your basic knowledge |

DSST Environment And Humanity

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. Consumers which eat decomposing organic material.






2. Organisms which eat other organisms.






3. A type of symbiosis where one species benefit at the expense of the other.






4. The process of planting different plant species right next to each other to maximize one's yield.






5. The first atmospheric layer. Most weather and pollution occurs here - and the temperature decreases with altitude.






6. Biomes with less than 10 inches of rain a year. Foliage is scarce in these areas - and remaining plants and animals work hard to conserve the little water they receive.






7. A form of management which attempts to satisfy both the needs of humans and those of wildlife in the best way possible for both parties.






8. Consumers which eat only other animals.






9. Animals which eat grass and roots.






10. The spraying of pesticides to prevent a pest problem before it happens.






11. The amount of variation among organisms living in a particular ecosystem. The loss of this key characteristic leads to a reduction in ecosystem efficiency and the ability of species to adapt to new situations.






12. A transitional area between two different ecosystems.






13. A type of farming where the farmer will fell and burn down trees to grow crops. After a few years - he will move on and continue the process.






14. Organisms with a nucleus.






15. Grasslands with short - widely spaced trees and no canopy - allowing for an unbroken layer of grasses beneath.






16. Political organizations not affiliated with the government which try to bring about social change.






17. A rainforest in the temperate zone which receives heavy rainfall.






18. An act which set standards for the amount of pollution in water.






19. An American environmentalist who is famous for promoting the ideas of environmental ethics and wildlife management.






20. A bloom of phytoplankton in a body of water caused by an abnormal increase in nutrients. This process depletes the water's oxygen level - killing off other aquatic organisms.






21. An extinct hominid species believed to have long - ape-like arms; have a brain capacity half that of modern men; and use primitive tools.






22. An act which established and enforced acceptable levels of air pollution.






23. A type of symbiosis where one species will benefit while the other will be neither benefit or be harmed.






24. Modern man.






25. The process by which a new species is created. This process generally requires geographic isolation to prevent interbreeding between the newly emerging species and the parent species.






26. The oxification of ammonia by certain bacterium into nitrite and later into nitrates - which can then be used by plants.






27. Average expected birth rate for 1 -000 women.






28. The second atmospheric layer. The ozone layer is found here - increasing the temperature with altitude.






29. Organisms which produce their own food.






30. The area between the troposphere and the stratosphere. Here the temperature reverses from decreasing to increasing with altitude.






31. All members of a species which live in the same area.






32. The process by which pollutants are carried by flowing water - such as a river.






33. Species which react quickly to an environmental change and therefore can be used to diagnose a particular ecosystem.






34. A forest characterized by clearly differentiated seasons - such as the trees loosing leaves in the fall and heavy snowfall in the winter.






35. An unstable form of oxygen which protects the earth from UV radiation. Although naturally occurring in the stratosphere (upper atmosphere) - in the lower atmosphere this gas acts as a pollutant.






36. An extinct hominid species with near the same brain capacity as modern man believed to use fire and stone tools - live a hunter/gatherer lifestyle - and speak a language.






37. A partially enclosed part of the ocean with rivers or streams flowing into it.






38. Evolution in one organism due to change in a related organism.






39. The biggest atmospheric layer. Without ozone - UV radiation causes ionization and the auroras in this layer.






40. A greenhouse gas which also plays a key role in regulating ozone levels.






41. An agency created to establish regulations concerning pollutants to protect humans and the environment.






42. Populations characterized by large size - long lifespan - and few offspring.






43. The loss of water vapor from leaves.






44. An international protocol designed to protect the ozone layer by phasing out the production of CFCs and other harmful chemicals.






45. A type of farming where the farmer will grow just enough crops to satisfy his family's needs for the next year.






46. The spraying of pesticides to keep produce from any injuries or damage.






47. A shubland found primarily in the South-Western United States and Mexico. Fire plays a predominant role in the life-cycle of the plants in this area - the seeds of which will sprout only after a fire.






48. The cycling and reusing of elements and molecules (such as water - nitrogen - and phosphorus) that are essential to life.






49. An act created to protect endangered and threatened species.






50. Consumers which eat both plants and animals.