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Science Presentation

1. WELCOME

2. ACTIVE VOLCANOES Location and Distribution : Active volcanoes are commonly found along plate boundaries, where oceanic and continental crust interact. -Divergent boundaries: Found at mid-ocean (the Mid-Atlantic Ridge.), where new oceanic crust is formed as magma rises from below. - Convergent boundaries: Found where oceanic crust subducts beneath continental or other oceanic crust, such as the pacific ring of fire. - Hotspots: These are exceptions and occur within oceanic or continental crust away from plate boundaries, such as the Hawaiian island.

3. a This Photo by Unknown Author is licensed under CC BY-SA EARTHQUAKE EPICENTERS Location and Distribution: earthquake epicenters are concentrated along plate boundaries due to the movement and interaction of tectonic plate Convergent boundaries: Produce deep and powerful earthquakes often near subduction zones (the Japan trench or andes mountains.) Divergent Boundaries: Generate shallow and less intense earthquakes, commonly along mid-ocean ridges. Transform Boundaries: Produce shallow but often sever earthquakes, such as along the San Andreas Fault.

4. MAJOR MOUNTAIN BELTS Location and Distribution: Mountain belts are typically found along convergent plate boundaries where oceanic crust collides or where oceanic crust subducts beneath continental crust. Collision Zones: The Himalayas formed where the Indian plate collided with the erusian plate Subduction Zones: The Andes Mountains formed along the western edge of South America due to the subduction of the Nazca plate beneath the south American plate

5. OCEANIC CRUST: -MOSTLY BASALTIC, THIN, AND DENSE. -Found at mid-ocean ridges 9new crust formation) and subduction zones (crust destruction) -Associated with underwater volcanoes, mid-ocean ridges, and deep sea trenches CONTINENTAL CRUST: -Mostly granitic, thick, and less dense -Associated with mountain belts, volcanoes arcs, and large earthquakes. RELATION TO CRUST TYPE:

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