ABS 270 Final Exam 100% Correct Answers

1. Question : Which of these statements is most accurate about the amount of rangelands

2. Question : What is the most important single environmental factor in determining the productivity of rangelands?

3. Question : If you were traveling from west to east across the Great Plains in the United States what would be the correct sequence of grassland types that you would encounter?

4. Question : Rangelands can be described as

5. Question : In the rangeland succession model what are some of the factors that keep rangelands from progressing toward climax?

6. Question : What happens to roots after grazing of the above ground vegetation?

7. Question : Most (over 50%) of the commercial timberland in the United States is owned by which of these groups?

8. Question : The U.S. Forest Service was established in 1905, to sustain the forests for future use. Who was the president of the US who was responsible for the establishment of the National Forests.

9. Question : Who was the first Chief of the Forest Service

10. Question : The largest contiguous ponderosa Pine Forest is located in:

11. Question : Typically Ponderosa Pine trees live to be about:

12. Question : In their natural (pre European Settlement) conditions Ponderosa pine forests were generally:

13. Question : What factor is most responsible for increasing mortality of trees by catastrophic fire?

14. Question : A colorless gas produced by motor vehicles and some industrial processes is most likely:

15. Question : While walking down a mountain pass, you see a factory town at a distance in the valley below. You can see that most of the pollution from the smokestacks appears capped as if by an invisible lid, so that it cannot spread out of the valley to the air above. What is the name of such a phenomenon?

16. Question : Which of the following are major atmospheric pollutants?

17. Question : Which of the following is a gaseous pollutant and a mojor conponent of photochemical smog–the brownish haze that shrouds many urban areas during the hot, sunny days of summer

18. Question : What is not a form of natural air pollution?

19. Question : A pollutant that is produced by chemical reactions between hydrocarbons and nitrogen oxides and its reactions are powered by sunlight is usually:

20. Question : The following condition(s) exacerbate air pollution problems:

21. Question : Scientists estimate that ___________people die each year at least partially due to air pollution.

22. Question : Which of the following are major human caused atmospheric pollutants:

23. Question : Which of the following pollutants refers to small solid particles and liquid droplets suspended n the air?

24. Question : Gaseous pollutants that form whenever sulfur-containing fuels, such as coal and oil, are burned are called:

25. Question : Hydrocarbons are organic compouds that are composed of hydrogen and carbon. Which of the following are hydrocarbon pollutants?

26. Question : Which of the following is a major pollutant that caused death by asphyxiation because it combines with hemoglobin in the red blood cells, blocking their ability to transport oxygen?

27. Question : A __________is formed when a warm, high-pressure air mass stalls over an area and sinks toward the ground, at times as low as 600 meters above the ground, forming a huge warm air lid.

28. Question : Today foresters in many countries use _________ to improve the quality of timber, livestock forage and wildlife habitat. This is a management strategy that is being adopted to sustain Forest Ecosystems.

29. Question : Areas of the world that are a source of forage such as grasses and shrubs for free-ranging native domestic animals and referred to as:

30. Question : Which of the following would you consider not to be a rangland?

31. Question : Which of the following is best defined as a community of plants, animals, and microorgaisms that are linked by energy and nutrient flows and that interact with each other and with physical environment

32. Question : Which of the following is not a terrestrial biome?

33. Question : Which of the following best describes the harmonious use of the range for more than one purpose: livestock, wildlife, water, recreation, etc?

34. Question : The focal point of range managment has been, and continues to be__________.

35. Question : What is the biggest threat to southwestern Ponderosa Pine Forests in Arizona?

36. Question : What kind of tree is ole Grizzly?

37. Question : A tree harvest method which leaves enough trees as a temporary shelter wood over story to provide 40% crown cover is called a:

38. Question : In the US about _____________% of the land area is classified as Forest Land?

39. Question : A method of harvesting timber which helped timber companies to efficiently harvest and create even aged (monoculture) stands was: