2/12/14

Tonight's homework is to complete Assignment 40. Below are the TED Talks that I was mentioning.

Michael Green: Why we should build wooden skyscrapers
Richard Preston: The mysterious lives of giant lives

Assignment 40 Forest Management Practice Questions

Multiple Choice

Refer to the following terms as answer choices for questions 1-4:

A. Clear-cutting

B. Shelterwood cutting

C. Whole-tree harvesting

D. Seed-tree Cutting

E. Strip-cutting

1. Nearly all of a stand’s trees are harvested in one cutting, leaving a few uniformly distributed fertile trees to regenerate the stand.

2. Removal of all trees from a given area in a single cutting.

3. Removal of all mature trees in two or three cuttings over a period of about ten years.

4. A corridor of trees is cut completely along the contour of the land, with the corridor narrow enough to allow natural regeneration within a few years

5. Which of the following is NOT affected by deforestation?

A. Soil erosion                                                             D. Biodiversity

B. Water cycle                                                             E. Ozone layer hole

C. Global temperature

6. Which tree harvesting method is the worst ecologically?

A. Selective cutting                                                     D. Seed-tree cutting

B. Shelterwood cutting                                               E. Slash and burn

C. Clear-cutting

Math Practice

7. For tree farmers who harvest wood for lumber or paper production the greatest profit can be realized by growing the maximum number of trees on an acre of land. The table below shows three different tree species and how many trees can be grown per acre.

Type of tree	Trees per acre
Loblolly Pine	350
Red Oak	200
Tulip Poplar	180

a. How many more pine trees than oak trees can be grown on 1000 acres of land?

b. How many more pine trees than poplar trees can be grown on 1000 acres of land?

Free Response

8. Answer each of the following questions to the best of your ability in complete sentences.

a. Describe two environmental effects of decreasing the rotation time in forests from an average of 60 years to 10 years.

b. Explain how these effects would be different for a woodland in a dry climate with sandy soil compared to a rain forest.

c. Describe what would happen in the aftermath of a fire. Identify which types of organisms would be present soonest after the fire.

d. Describe two reasons why fires can be beneficial for forests.

Discussion Questions

Read Henry David Thoreau’s “Death of a Pine” and answer the following questions.

9. What does the tree represent for Thoreau?

10. What does Thoreau mean when he says, “It is lumber. He has laid waste to the air?”