seafloor spreading

mid-ocean ridge

• " scientists found that the seams formed mountain ranges that ran along the middle of some ocean floors scientists called these mountain ranges mid-ocean ridges." ( p.98)

mid-ocean ridge

• " scientists found that the seams formed mountain ranges that ran along the middle of some ocean floors scientists called these mountain ranges mid-ocean ridges." ( p.98)

sea-floor spreading affects earth's crust

• " Sea-floor spreading adds more crust to the ocean floor. At the same time, older strips of rock move outward from either side of the ridge. "

Deep-ocean Trenches

• " No, eventually the ocean floor plunges into deep underwater canyons. These canyons are called deep-ocean trenches"

References

• Thornton, K., Buckly, D., Miller, Z., Padilla, M.J., Wysession, M.E. (2013) Interactive Earth Science. Glenview, Illinois: Pearson Education, Inc.