science

• Earthquake


  Happens when tectonic plates move and cause the ground to shake
• Seismograph


  Instrument that measures the motion of the ground during an earthquake
• Types of earthquakes


  • Tectonic earthquakes
  • Volcanic earthquakes
• Tectonic earthquake


  Caused by the movement of the earth's crust or crustal plates
• Magnitude


  Measure of the amount of energy released by an earthquake
• Intensity


  Measure of the shaking and damage caused by an earthquake
• Focus


  The break in the ground where the earthquake originates
• Epicenter


  The point on the earth's surface directly above the focus of an earthquake
• The Philippine Institute of Volcanology and Seismology is the government agency responsible for monitoring earthquakes and volcanic eruptions in the Philippines
• Volcano


  An opening in the earth's crust where lava, molten rocks and volcanic materials are forced out
• Parts of a volcano


  • Crater
  • Vent
• Types of volcanic eruptions


  • Explosive
  • Non-explosive
• Stages of volcanoes


  • Active
  • Dormant
  • Extinct
• Volcanic eruption


  Can make the soil fertile
• Volcanic eruption


  Can cause landslides, flooding and damage to buildings and farms
• Volcanic ash


  Can irritate lungs and cause health problems
• Heat from volcano


  Can generate geothermal steam to produce electricity
• Volcanic eruption


  Can trigger earthquakes
• Volcanic rocks


  Can provide industrial materials and help scientists study the earth's interior