Volcanoes Shirley Duke Rourke educational media rourkeeducationalmedia com Scan for Related Titles and Teacher Resources
What is a Volcano Volcanoes begin deep within the Earth Hot molten rock called magma collects far underground Forces below it crack the underground rock Pressure pushes melted rock upward through these openings The molten rock explodes from the opening or flows out The molten rock is now lava Once cooled the lava solidifies and becomes igneous rock Over time a cone shape builds up Hot Fact Igneous rock is one of three main types of rocks The other types are sedimentary and metamorphic 4
ash and gas cloud rock fragments lava crater cone vent magma chamber Magma chambers underground hold different amounts of magma Cracks and vents allow the hot magma to move Did You Know The word volcano came from the name of the Roman god Vulcan People once thought the lava and gas clouds erupting from the island of Vulcano was Vulcan forging thunderbolts for Jupiter king of their gods and for Mars their god of war upward and collect in chambers in volcanoes Certain conditions force the magma above ground where it cools as lava 5
