Question

5 why is the big island of hawaii still volcanically active, while the older hawaiian islands are not? cr

Explanation:

The Hawaiian Islands are formed by a hot spot (a stationary plume of magma in the Earth's mantle) and the Pacific tectonic plate moving over it. The Big Island is currently over the hot spot, so magma rises to form active volcanoes. Older islands have moved away from the hot spot, so volcanic activity ceased as the plate carried them to areas without the hot - spot's magma supply. This explanation is based on the theory of plate tectonics and hot - spot volcanism, which are concepts in the subfield of Geology (under Natural Science).

Answer:

The Big Island of Hawai'i is still volcanically active because it is currently positioned over the Hawaiian hot spot (a stationary mantle plume that supplies magma). The older Hawaiian Islands are no longer volcanically active as the Pacific tectonic plate has moved them away from the hot spot, so they no longer receive the magma supply needed for volcanic activity.