Volcanic Eruption

• Involves an energetic blast that forcefully ejects material from a volcano

  explosive eruption
• is a fluid's thickness or Resistance to flow.

  viscosity
• It is like a river running down the slope of the volcano towards low-lying areas.

  basaltic lava flow
• Usually begins with fire fountains due to the release of dissolved gases.

  effusive eruption
• Lava with low viscosity (fluid lavas) spills out from the volcano vent.

  effusive eruption
• Occur when gas pressure within the volcano builds up and gas bubbles cannot rise to the surface and escape.

  explosive eruption
• Lava with --- content has low viscosity that it can travel a great distance, forming a thin sheet.

  less silica
• Lava with --- content is too viscous to travel far, and tends to break up as it flows.

  high silica
• The Earth is believed to be extremely hot from within. This heat from the Earth's interior is a source of energy called?

  geothermal energy
• The World's Top 10 biggest Geothermal Energy Plants

  Makban Geothermal Complex, Philippines

  Tiwi Geothermal Complex, Philippines

  Malitbog Geothermal Power Station, Philippines
• Geothermal energy is generated in two ways

  Geothermal Power Plants

  Geothermal Heat Pumps
• An opening on the surface of a planet or moon that allows material warmer than it's surroundings to escape from its interior

  Volcano
• Those that have a record of eruption within the last 600 years or those that erupted 10,000 years ago based on analyses of their material

  Active Volcano
• Those have not erupted for the last 10,000 years and their physical form is being changed by agents of weathering and eroison

  Inactive volcano
• Formed by the accumulation of lava that oozes out from the volcano, since non-viscous lava can flow freely, a broad slightly domed structure that resemble's a warrior's shield

  Shield volcano
• Built from ejected lava fragments. They have a steep slope, wide crater and are the most abundant of the three major volcano types

  Cinder cone
• Are large, nearly perfect sloped structure formed from alternate solidification of both lava and pyroclastic deposit

  Composite cones / stratovolcano
• It is a stream driven eruption as the hot rocks come in contact with water. It is short-lived, characterized by ash columns but may be an onset of a larger eruption.

  Hydrothermal
• Is a violent eruption due to the contact between water and magma. As a result, a large column of very fine ash and high-speed and sideway emission of pyroclastic called base surges are observed

  Phreatomagmatic