Seafloor spreading

MID-OCEAN RIDGE

• "MID-OCEAN ridges form long chains of mountains that rise up from the ocean floor."(p.98)

how seafloor spreading affects Earth's crust

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

deep-ocean trenches and the process of subduction

• "at deep-ocean trench,the oceanic crust bends downward."
• "the process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle again is called subduction"
• (p.102)

REFERENCES

• Thorton.,k.
• buckeley,d.
• wysession,m.e.
• padilla
• m.j
• interactive earth science. glenveiw,illinos:pearson education,inc{