How do observations of earthquake and volacanic activity support the theory of plate tectoincs?

Question

2. What evidence in support of plate tectonics is provided by studies of the ocean floor?

3. Identify the weaknesses in Wegner's continental drift hypothesis. Explain how the theory of plate tectonics differs from the continental drift hypothesis.

4. What would you expect to find if you measured the temps. of rocks on the ocean floorat various distances from a mid-ocean range?

Answer 1

1. EQs and volcanoes occur in the same places over and over which happen to be along certain boundaries between plates.

2. Spread ocean ridges.

3. Look up both hypothesis and then describe the difference. Wegner didn't mention anything about mantle convection.

4. Mid ocean ridge = magma
Magma = hot
So as you move away from the hot ridge what happens to the temps?