place near plate boundaries. There are some places deep inside the Earth that are much hotter than others. As a result, there is constant volcanic activity above these spots, known as hot spots. This activity leads to the formation of underwater volcanoes. The constant movement of tectonic plates eventually shifts the volcano away from the hot spot. Soon, another volcano is created in the area near the hot spot. This often leads to the formation of a chain of islands, such as the Hawaiian Islands.