2nd SEM-FINAL DRRR

• Volcano


  fascinating geological features that

  are formed when molten rock, ash, and gas escape

  from the Earth's surface.
• Volcanic

  HAZARDS


  observable

  facts that are arising due to

  volcanic activity such as eruption, one of the

  dangerous event that may happen

  because it results to different

  hazards.
• 1. crater
  2. magma chamber
  3. conduit
  4. fumarole


  parts of volcano
• CLASSIFICATIONS OF

  VOLCANOES

  Active, dormant and

  extinct
• SHIELD VOLCANOES


  LARGE BROAD slopes, fluid lava flow, (up-sideways)
• composite volcanoes


  steep and symmetrical, explosive eruption, (parang puno yung pagsabog, scatter)
• lava domes


  small with steep sides, ouzes viscous lava ( wide one direction of lava flow)
• cinder cones 


  smallest, single vent, erupt cinders, ash, and rocks ( thin-downward flow of lava)
• The

  Crater


  This is a bowl-shaped

  depression at the top

  of the volcano that

  forms when the

  summit collapses

  after an eruption.
• Magma

  Chamber


  This is a large

  underground cavity

  or reservoir where

  molten rock (magma)

  is stored before it

  erupts.
• Conduit


  This is a long, narrow channel that connects the

  magma chamber to the surface of the volcano.

  Magma rises through the conduit and erupts.
• Fumarole


  This is a vent on the surface of the volcano that

  emits steam, gas, and other materials.

  Fumaroles are found near the summit.
• magma


  molten rock that is inside the volcano
• lava


  molten rock that is released outside of the volcano