Geo 101 ch.2 video quiz: plate tectonics explained

3. Diverging mantle currents push plates apart. a. True b. False

- False convective forces in the mantle pull plates apart

2. Slab pull in addition to mantle flow is responsible for the motion of tectonic plates. a. True b. False

- True The mass of pulling slabs as they subduct moves plates.

4. Multiple lines of independent evidence, such as the geometric fit of the continents and correlation of rock type, structures, and fossils, helped geologists to develop the hypothesis of continental drift and ultimately the theory of plate tectonics. a. True b. False

- True These are many of the observations that convinced geologists that plate tectonics was a valid process model for Earth.

1. Flowing mantle alone is responsible for the motion of tectonic plates. a. True b. False

- false Slab pull and ridge push are also important.

5. When two plates converge, the one that subducts is always made of dense, oceanic crust. a. True b. False

-True Less dense continential crust does not subduct