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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. Consumers which eat decomposing organic material.

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

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

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

5. The rate at which producers create organic material.

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

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

8. Excess water which cannot be infiltrated into the soil and instead flows along the ground.

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

10. Animals which eat grass and roots.

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

12. Organisms with a nucleus.

13. 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.

14. An act which called for the careful examination of new chemicals to ensure they are safe for their intended uses.

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

16. A forest found in temperate regions with warm summers - cool winters - and plenty of rainfall. These kinds of forests are characterized by evergreens and deciduous trees.

17. Exceptionally acidic (low pH) rain. This phenomenon is caused mainly by emissions of carbon dioxide - sulfur dioxide - and nitrogen oxide which react with water particles in the air.

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

19. Any living thing on earth.

20. The coexistence of two species using the same resource where the two will use the resource in different ways.

21. An international organization designed to promote free trade between countries.

22. All of the water found on earth.

23. An international convention which created the framework for protecting the ozone layer.

24. A forest near the equator with heavy rainfall and a great diversity of plant and animal life. Although a mere 2% of the earth is covered with these forests - they contain 50-80% of earth's land species.

25. A layer of gasses surrounding the earth.

26. 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.

27. A variety of species living together.

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

29. The amount of pests needed before spraying pesticides is economical.

30. An act requiring federal agencies to detail the impact of proposed environmental policies.

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

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

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

34. The UN's first major conference on environmental issues.

35. Forests found in the northern regions of North America - Europe - and Asia characterized by freezing winters and warmer summers. These forests lie just below the tree line.

36. The conversion of nitrates into nitrogen gas.

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

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

39. 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.

40. An international protocol designed to stabilize global warming.

41. Different species living in close contact with each other.

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

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

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

45. 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.

46. Organisms which thrive in low nutrient environments and usually have slow growth rates.

47. An extinct hominid species believed to exhibit the first example of full-time bipedalism.

48. A group of similar organisms capable of interbreeding.

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

50. The flow of water in the water table.