Mapping the Ocean Floor Background Information: sound navigation and R
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- Mid Atlantic Ridge Mariana Trench
- Distance from S. Guam (km) Depth to sea floor (m)
- Mid Atlantic Ridge Latitude 39 o N
Materials: Graph paper, pencil, blue, brown map pencils Data sheets for Mariana Trench and Mid-Atlantic Ridge
Using the graphs provided, label the x-axis with distance and the y-axis with depth. Don’t forget the units! The heavy line across the graph represents sea level (0 meters). Plot the depth of each recorded sounding at each distance on the graph paper. Connect the plotted graph points to create a profile of the sea floor along the Mid-Atlantic Ridge. Repeat the procedures for the Mariana Trench.
Analysis: Shade in the sea floor with a brown map pencil on both graphs. Shade in the ocean water with a blue map pencil on both graphs. Using your knowledge of plate tectonics, reference maps and your textbook, label the following on your graph:
Conclusions: Write two paragraphs. The first paragraph should explain the plate tectonics along the Mid-Atlantic Ridge. The second paragraph should explain plate tectonics along the Mariana Trench. Application: How are the two maps alike? How are they different? How does the process taking place on each map determine the topography?
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