NLC

• Magma is molten rock that forms from the partial melting of the earth's mantle or crust.
• What force pull the magma through earth surface? Buoyancy forces
• Where do volcanoes tend toform? In the earth's weakness such as fault, fractures, along tectonic plate boundaries of rift zone
• How do conduit influence the volcano intensity? Size and shape
• What are the driven pressure of magma through surface? The difference between magma chamber and surface, the density of magma and the surround rock
• Lava- when magma reaches the surface
• What are the factor in considering the erupt of magma? Composition of source magma, gas content and eruption style
• What characteristics feature do lava dodo around volcano?


  Cones

  Crater

  Caldera
• The form of volcano may influece by geological time: magma supply, eruption frequency, tectonic activity