Refer to the accompanying map showing the Eastern Seaboard

Refer to Figure 13.2 to answer the following questions: a. Water dominates Earths surface, but not everywhere. In what Northern Hemisphere latitude belt is there more land than water? b. In what latitude belt is there no land at all?

Assuming the average speed of sound waves in water is 1,500 meters per second, determine the water depth if a signal sent out by an echo sounder on a research vessel requires 6 seconds to strike bottom and return to the recorder aboard the ship.

Refer to the accompanying map showing the Eastern Seaboard of the United States to complete the following: a. Which letter is associated with each of the following? Continental shelf; continental slope; and shelf-break. b. How does the size of the continental shelf surrounding Florida compare to the size of the Florida peninsula? c. Why are there no deep-ocean trenches on this map?

Are the continental margins surrounding the Atlantic Ocean primarily active or passive? How about the margins surrounding the Pacific Ocean? Based on your response to the foregoing questions, indicate whether each ocean basin is getting larger, shrinking, or staying the same size. Explain your answer

Examine the accompanying sketch showing three sediment layers on the ocean floor. What term is applied to such layers? What process was responsible for creating these layers? Are these layers more likely part of a deep-sea fan or an accretionary wedge?

Imagine that while you and a passenger are in a deep-diving submersible in the North Pacific near Alaskas Aleutian Islands you encounter a long, narrow depression on the ocean floor. Your passenger asks whether you think it is a submarine canyon, a rift valley, or a deep-ocean trench. How would you respond? Explain your choice.

Reef-building corals are responsible for creating atollsring-shaped structures that extend from the surface of the ocean to depths of thousands of meters. These corals, however, can only live in warm, sunlit water no more than about 45 meters deep. This presents a paradox: How can corals, which require warm, sunlit water, create structures that extend to great depths? Explain the apparent contradiction.