Instructions: Choose the phrase that best answers each question.
1. Examine Figure 1. Which statement best describes the path of the 15022 buoy (colored red). [Directions are typical map coordinates: north is toward the upper part of the map, south is toward the lower part, west is to the left, and east is to the right.]
A) It moved to the west along the equator, then to the northeast along the coast of Asia.
B) It moved to the southwest along the coast of Asia, then to the east along the equator.
C) It moved to the south along the coast of North America, then to the west along the equator.
D) It moved to the east along the equator, then to the north along the coast of North America.
2. Examine Figure 2 and the diagram of major oceanic currents (on the computer or Figure 8.8 in the textbook). Which statement best describes the Gulf Stream?
A) It is a cold water current that flows from north to south.
B) It is a cold water current that flows from south to north.
C) It is a warm water current that flows from north to south.
D) It is a warm water current that flows from south to north.
3. Examine Figure 3, the image of worldwide sea-surface temperatures. The warmest water (colored red) is found along the equator. Which statement best describes the shape of this warm water?
A) It gets wider (extends further north and south) toward the eastern sides of the oceans.
B) It gets wider (extends further north and south) toward the western sides of the oceans.
C) It has the same width along the length of the equator.
4. Examine Figure 4. In this image, the areas of the world ocean that have the highest chlorophyll pigment values (the red, yellow and green colors that indicate lots of primary productivity) are
A) In the centers of the oceans
B) In the Southern Hemisphere
C) Along continental edges
D) Along the equator
5. Read article 1 in Part II of the voyage ("solid evidence 'greenhouse gas' heating up earth"). Which of following best describes the evidence presented in this article?
A) Scientists who study climate have found no evidence that earth is warming.
B) Scientists who study climate have found no evidence that human factors have caused warming.
C) Scientists who study climate agree that earth is warming but disagree on the causes.
D) Scientists who study climate all agree that the earth is warming because of human causes.
Instructions: Write short answers for the following questions. Answers will be graded credit / no credit. Results will be available several days after the exercise due date.
1. Examine Figure 1 and the diagram of major oceanic currents (on the computer or Figure 8.8 in the textbook). What are the names of the surface currents that moved these buoys? [You must name all three to obtain credit.]
Buoy 12410 (green color):
Buoy 15022 (red color):
Buoy 22217 (blue color):
2. Examine the diagram of major oceanic currents (on the computer or Figure 8.8 in the textbook). What is the name of the current that moves water past the coast of California? Do you think it carries warm or cold water past our coast?
3. Examine Figure 2 and, if needed to locate currents, the diagram of major oceanic currents. Describe the shape of the Gulf Stream and the nature of its boundary with the Labrador Current (cold-water current in blue colors).
4. Examine Figure 4. Which areas in the ocean have the lowest chlorophyll values (lowest amount of plant growth---colored blue to magenta)?
5. Read article 2 in Part II of the voyage ("Greenland ice cap melting, raising sea level"). Briefly explain in your own words one way in which humans could be effected by an earth that is warming.