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DSST Environment And Humanity

Subjects : dsst, science
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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 greenhouse gas which also plays a key role in regulating ozone levels.

2. A greenhouse gas. Although it is a natural part of the carbon cycle - the atmospheric concentration of this gas has increased due to the burning of fossil fuels.

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

4. The process of a gas transforming into a liquid.

5. 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.

6. Areas with only enough rainfall for grasses to grow. As a result - most animals are grazers - such as buffalo.

7. The combination of evaporation from the ocean - lakes - and other bodies of water and transpiration - the loss of water from plants.

8. 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.

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

10. An extinct hominid species believed to be the last common ancestor between man and apes.

11. The rate at which producers create organic material.

12. The infiltration of harmful chemicals - particles - or biological matter into the atmosphere which endanger living organisms. Pollutants include sulfur and nitrogen oxides - ammonia - and chlorofluorocarbons. Although there are natural sources for th

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

14. Also called that water cycle - this process describes the cycling of water throughout the environment. The stages of this cycle are evaporation - condensation - transportation - precipitation - infiltration and percolation - and run off.

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

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

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

18. 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.

19. A UN conference that addressed the growing population problem.

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

21. A community of similar living organisms largely affected by the area's climate.

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

23. Consumers which eat decomposing organic material.

24. The place of an organism in an ecosystem - such as what it eats and how it interacts with other organisms.

25. The middle atmospheric layer. Meteors burn up after entering this layer.

26. A law designed to locate toxic waste sites - gauge their pollution level - and ensure these sites are taken care of properly.

27. 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.

28. A group of similar organisms capable of interbreeding.

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

30. Growing more than one crop at a time.

31. Integrating rows of trees alongside crops to provide mulch and shade - retain water in the soil - and promote sustainable land use.

32. Precipitation which does not reach the soil but is instead collected by plants.

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

34. A type of symbiosis where each species will benefit from interacting with the other.

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

36. Biomes far north in North America - Europe - and Asia which - due to very low temperatures - cannot support tree growth.

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

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

39. The uppermost atmospheric layer. Here satellites orbit the earth.

40. Organisms which thrive in high nutrient environments - especially those with plenty of carbon.

41. 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.

42. Species which serve key roles in an ecosystem. The absence of these important organisms is detrimental to the surrounding area.

43. An influential book by Rachel Carson which helped begin the environmental movement.

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

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

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

47. Organisms which produce their own food.

48. An especially potent greenhouse gas emitted during production and transportation of fossil fuels - decomposition of organic matter - and herds of livestock.

49. The decomposition of organic nitrogen into inorganic ammonium. This process is also called mineralization.

50. A situation where a layer of warmer air traps lower - cooler air - causing pollution to collect near the ground.