1. geologic time
2. stratum
You could have just googled these...
The basic theory of plate tectonics is that along seafloor spreading zones, the continents are separating from one another. As they spread apart, magma comes to the surface and becomes new continental crust. As the tectonic plates move away from spreading zones, they collide with one another.
Answer:
8. B. we see comets when they approach the sun.
9. A. the sun's surface.
There is no active fault on the east coast. While the pacific and north American plate are active
