Seafloor Spreading

Name and describe the feature of the ocean floor shown at A.

Describe the process shown occurring at B, and explain what results from this.

What happens to old oceanic crust as new molten material rises from the mantle?

The arrows on the figure show the ocean floor spreading from the ridge. What are three kinds of evidence scientists have found to support this idea?

What process is shown occurring at C, and why does it occur?

A device that scientists use to map the ocean floor is

The feature on the ocean floor at C is called a(n)

The process that continually adds new material to the ocean floor is called

The process by which the ocean floor sinks into the mantle is called

A chain of underwater mountains along which sea-floor spreading occurs is a