Volcano

• Volcano - an opening in the earth's crust through which molten rock and gases can escape
• Crater - bowl shaped opening at the top of the volcano
• Lava - molten rocks that flows from a volcano during an eruption
• Magma - extremely hot liquid and semi-liquid rock located under earth's surface
• Magma Chamber - The upper part of the mantle where magma is stored and erupts
• Ash cloud - tiny volcanic rock fragments, dust and gases released from the volcano
• conduit - pipe-like structure that connects magma chamber to surface
• sill - flat rock formation from molten magma solidified