seafloor spreading

Mid-Ocean Ridge

• ''Mid-ocean ridges form long chains of mountains that rise up from the ocean floor''

Explain how sea-floor spreading affects earth's crust

• ''Sea-floor spreading adds more crust to the ocean floor.''(p.100)
• ''At the same time,older strips of rock move outward from either side of the ridge"(p.100)

Explain deep-ocean trenches and the process of subduction

• ''In a process taking tens of millions of years part of the ocean floor sinks back into the mantle at deep-ocean trenches.'' (p.102)

refrences

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