1. What do you call two tectonic plates that are moving away from each other? 2. Two tectonic plates moving toward each other?
3. Two plates that are moving toward each other and one plate slides under neath the other?
4. Two plates that are moving in opposite directions and their boundaries are scraping past each other?

1. Divergent
The plates that move apart are called diverging plates. As the diverging plates move apart, a crack is created that causes magma to rush up and form a new bedrock. Most are found on the seabed.

2. Convergent
The plates that move towards each other, ie the plates that eventually collide

3. Subduction zone
It is a boundary area in the lithosphere. Two plates in the lithosphere collide with each other, as one plate is pressed down under the other and sinks into the mantle.

4. Spreading zone
Is a plate tectonic boundary where two tectonic plates move apart. The material contained in the mantle rises towards the lithosphere and this occurs at the same time as the crust cracks. When the crust cracks, magmatic mantle material rushes out between the plates.

All of this is from my own personal documents so be free to use it and dont think about plagiarism:)