Question

You also saw how plates interact with each other. The interactions between plates form plate
of which there are three main types.

Answer 1

You mean plate boundaries. The interactions between plates form plate boundaries, of which there are three main types:

- Divergent boundaries: plates move apart. Features: mid-ocean ridges, rift valleys, new crust formation, volcanic activity (e.g., Mid-Atlantic Ridge, East African Rift).

- Convergent boundaries: plates move toward each other. Features depend on plate types:
- Oceanic-continental convergence → subduction, volcanic mountain chains (e.g., Andes).
- Oceanic-oceanic convergence → island arcs and trenches (e.g., Mariana Islands/Trench).
- Continental-continental convergence → crustal collision and mountain ranges (e.g., Himalayas).
Common hazards: strong earthquakes, volcanism, deep ocean trenches.

- Transform boundaries: plates slide past each other horizontally. Features: strike-slip faults and earthquakes (e.g., San Andreas Fault).

These three boundary types explain most major tectonic landforms and seismic/volcanic activity.