Question

Japan, the Aleutian Islands (part of Alaska), and the islands of the south seas were all formed by witch of the following?

A) Transform faulting of mountain ranges

B) subduction of the pacific plate at trenches

C) riffs along the edge of the pacific plate

D) collision of two plates at mid-ocean ridges

Answer 1

Japan, the Aleutian Islands, and the islands of the south seas were formed by the subduction of the Pacific plate at trenches, which is a part of the cycle of plate tectonics characterized by volcanic eruptions and earthquakes within the Ring of Fire.

Step-by-step explanation:

Japan, the Aleutian Islands, and the islands of the south seas were all formed by subduction of the Pacific plate at trenches. This geological process occurs in regions known as subduction zones, where one tectonic plate moves under another and is forced to sink into the mantle. The Ring of Fire, a zone of frequent earthquake and volcanic activity around the rim of the Pacific Ocean, has played a critical role in the formation of these islands.

The interaction between tectonic plates in these areas often leads to volcanic eruptions and earthquakes, contributing to the creation of island chains like Japan and the Aleutian Islands. The subducted oceanic crust is pushed down into high pressure and temperature regions, eventually melting and being recycled in the mantle's convection currents, thereby balancing the formation and destruction of crust in the cycle of plate tectonics.

Answer 2

Option(d)

Japan, the Aleutian Islands (part of Alaska), and the islands of the south seas were all formed by collision of two plates at mid-ocean ridges.

Explanation:

An island is formed when two oceanic plates collide and due to the difference in density one plate goes below the other, resulting in the coming upwards of some material. SiMa ( iron and magnesium) and mafic rocks forms the oceanic crust.

The earth's inner heat mobilize the inner mantle thus causing a movement of plates.