Question

explain each plate boundary associated geological activity? divergent where plates move apart causing new crust to form through volcanic and earthquake. convergent: continental/continental continental/oceanic oceanic/oceanic transform

Explanation:

• Divergent Boundary: Plates move apart. Magma rises, forming new crust. Associated with volcanic activity (e.g., mid - ocean ridges) and earthquakes as plates adjust.
• Convergent Boundary - Continental/Continental: Two continental plates collide. No subduction (similar density). Results in mountain building (e.g., Himalayas) from crustal compression.
• Convergent Boundary - Continental/Oceanic: Oceanic plate (denser) subducts under continental plate. Subduction zone forms. Volcanic arcs (e.g., Andes) develop as magma rises from subducted plate melting. Earthquakes common due to plate interaction.
• Convergent Boundary - Oceanic/Oceanic: One oceanic plate subducts under another. Forms island arcs (e.g., Japan) from volcanic activity. Deep - sea trenches (e.g., Mariana Trench) at subduction site. Earthquakes occur as plates grind.
• Transform Boundary: Plates slide past each other. No crust creation/destruction. High earthquake risk (e.g., San Andreas Fault) from frictional stick - slip motion.

Answer:

• Divergent: Plates move apart, new crust via magma (volcanic, seismic).
• Convergent - Continental/Continental: Crust collision → mountain building.
• Convergent - Continental/Oceanic: Subduction (oceanic under continental) → volcanic arcs, trenches, earthquakes.
• Convergent - Oceanic/Oceanic: Subduction (oceanic under oceanic) → island arcs, trenches, earthquakes.
• Transform: Plates slide → earthquakes (no crust change).