How they work- The process of eruption begins when pressure builds on the magma chamber. The pressure causes magma to be forced up the conduit. When it reaches the surface the magma thrust through it causing an eruption.
The largest volcano-The largest volcano on Earth is Hawaii's Mauna Loa. It is six miles tall from the sea floor.
The most active volcano in the continental U.S.- The most active volcano is Mount St. Helens in Washington State.
The largest volcano in our solar system- The largest volcano in our solar system is Olymic Mons on planet Mars. It is 17 miles tall and 320 miles across.
Where does the word volcano originate-The name volcano is from the Romans. The Romans believed in Vulcan, the god of fire. The place where they believed he lived was inside the earth beneath the island Hiera. It is now called Vulcano and the word is used when referring to any of the active volcanoes around the world.
How is magma formed-Magma forms because the rocks are at high temperature and pressure deep inside the earth.
An active volcano today-Kilauea is an active volcano on the Big Island of Hawaii. Kilauea is also the youngest volcano in Hawaii. There have been 34 eruptions since 1952 and 61 eruptions total.