3 Written Questions
3 Multiple Choice Questions
- a process that continually adds new material to the ocean floor
- Several types of evidence supported the theory of sea floor spreading: eruptions of molten material, magnetic stripes in the rock of the ocean floor, and the ages of the rocks themselves.
- In sea-floor spreading, the sea floor spreads apart along both sides of a mid-ocean ridge as new crust is added. As a result, the ocean floors move like conveyor belts, carrying the continents along with them.
2 True/False Questions
deep-ocean trenches → deep underwater canyons
What happens at deep-ocean trenches? → In a process taking tens of millions of years, part of the ocean floor sinks back into the mantle at deep-ocean trenches.