Question

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Answer 1

Destructive Plate Boundary

A destructive plate boundary is sometimes called a convergent or tensional plate margin. This occurs when oceanic and continental plates move together. The oceanic plate is forced under the lighter continental plate. Friction causes melting of the oceanic plate and may trigger earthquakes.

Constructive Plate Boundary

A constructive plate boundary, sometimes called a divergent plate margin, occurs when plates move apart. Volcanoes are formed as magma wells up to fill the gap, and eventually new crust is formed. An example of a constructive plate boundary is the mid-Atlantic Ridge.

Uncertain Plate Boundary

1. Divergent boundaries: where new crust is generated as the plates pull away from each other.
2. Convergent boundaries: where crust is destroyed as one plate dives under another.
3. Transform boundaries: where crust is neither produced nor destroyed as the plates slide horizontally past each other.
4. Plate boundary zones: broad belts in which boundaries are not well defined and the effects of plate interaction are unclear.

Direction of Plate Boundary

Direction of tectonic plates

Answer 2

Answer:

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