1-name and describe the feature of the ocean floor shown at A. 2- describe the process shown occurring at B, and explain what results from this.
3-what happens to the old oceanic crust as new molten material rises from the mantle?
4-the arrows on the figure show the ocean floor spreading from the ridge. What are 3 kinds of evidence scientists have found to support this idea?
5- what process is shown at C, and why does it occur?
6- A device that scientists use to map the ocean floor is called...
7-The feature on the ocean floor at C is called a(n)...
8-The process that continually adds new material to the ocean floor is called...
9- The process by which the ocean floor sinks into the mantle is called...
10- a chain of underwater mountains along which sea-floor spreading occurs is a...