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

2. 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.

3. Surface run-off caused by melted snow.

4. The cloudiness of a liquid due to small suspended particles.

5. Any living thing on earth.

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

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

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

9. 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.

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

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

12. An international protocol designed to stabilize global warming.

13. Growing more than one crop at a time.

14. 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.

15. The process of planting trees in between other crops.

16. Growing only one crop at a time.

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

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

19. Water found in estuaries. This water is a mixture of saltine ocean water and fresh water - usually from a river or stream.

20. A type of farming where the farmer will grow crops both to fulfill his family's needs for the next year and to sell on the market.

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

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

23. All of the ecosystems on earth.

24. An act which required the EPA to set standards for drinking water.

25. The process by which certain kinds of bacteria convert atmospheric nitrogen gas into ammonia - a form accessible to living creatures.

26. Populations characterized by small size - short lifespan - and lots of offspring.

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

28. A group of similar organisms capable of interbreeding.

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

30. Consumers which eat both plants and animals.

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

32. The crust and upper mantle of the earth.

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

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

35. Animals which eat grass and roots.

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

37. The position of an organism on the food chain.

38. Organisms which consume autotrophs for food.

39. 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.

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

41. The process of surface water entering the soil. This ensures that plants have adequate access to water.

42. 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

43. 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.

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

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

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

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

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

49. Animals which eat leaves and shoots.

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