An extinct volcano is one that has not erupted in at least 10,000 years and is not expected to erupt in the future, according to Oregon State University. There can be confusion between dormant and extinct volcanoes, but the difference between the two is that a dormant volcano may erupt even if it is in the distant future.Know More
Volcanoes are often classified according to their activity. While extinct and dormant are two types of volcanoes, a third type is an active volcano. This volcano type is one that erupted in the past and is capable of erupting at a future time.
An example of an active volcano is Kilauea in Hawaii, and a dormant volcano is Mauna Kea, which erupted nearly 4,000 years ago. Kohala in Hawaii is an example of an extinct volcano; its last eruption was nearly 60,000 years ago. Although a volcano may be classified as extinct, it could possibly resume activity in the future if it goes through a process called rejuvenation.Learn More
It is hard to put an exact figure on the number of extinct volcanoes in the world; according to Oregon State University, the expectation that a volcano will never erupt again is no guarantee that this is actually the case. When it comes to predicting volcanic behavior, there is a lot of potential room for human error.Full Answer >
An inactive volcano is one that could erupt but has not erupted for more than 10,000 years. Inactive volcanoes are also called dormant or sleeping volcanoes.Full Answer >
Safe and educational volcano information designed for kids can be found in content from Weather Wiz Kids, Science Kids, National Geographic Kids, Volcano World from the Department of Geosciences at Oregon State University and Scholastic. These resources teach kids by using interactive graphics, basic scientific terminology, fun facts lists and answers to frequently asked questions. Some, like Volcano World, offer suggestions for curricula for all ages of kids.Full Answer >
A volcano erupts through the build-up and release of pressure, whether that pressure is of its underlying magma, water or both. This release can be explosive, as it was in the famous eruption of Mt. Vesuvius that destroyed Pompeii, or it can be slow and effusive, as it is in the ongoing formation of the Hawaiian islands.Full Answer >