Science 6

• The crust surface belongs to the first layer
• A part of a rocky rigid layer called Lithosphere
• Asthenosphere is made up of several large and small plates that move above a viscous layer
• Earthquakes happen when crustal plates move
• There are 2 types of earthquakes. These are Volcanic and Tectonic earthquakes
• Volcanic Earthquakes happens with a strong volcanic eruption
• Tectonic Earthquakes is caused by the movement of the earth's crust
• Magnitude refers to the amount of energy released by an earthquake from its focus
• Focus is the break in the ground caused by the pressure of the moving rocks
• The ground above the focus is called the epicenter
• Pacific Ring of Fire is an area where crustal plates are weak
• PHIVOLCS refers to Philippine Institute of Volcanology and Seismology