science mid

• Core - the deepest layer of the earth. Its as hot as the surface of the burning sun
• Secondary waves -it only moves through solids.
• Moment magnitude scale (MMS) also called Richter Scale -this is use by scientist to measure the magnitude of an earthquake
• Jeffrey Perez -is the supervising science research specialist at PHIVOLCS, who is hailed as the "Faultfinder".
• He is hailed as one of the Outstanding Young Scientists by the National Academy of Science and Technology (NAST), the highest recognition and advisory body for matters related to science and technology.
• Volcanoes - are one of the tallest landforms.
• Volcano -is an opening in earth s crust that erupts when pressure builds up. it can be a hill or a mountain where hot, molten rocks with gaseous materials ejected.
• The Philippines is situated on the boundaries of two tectonic plates. This are the Philippine Sea Plate and Eurasian Plate.
• due to the Philippines Sea Plate and Eurasian Plate, many earthquakes and volcanic activities are observed in our country.
• types of volcanoes

  • Cinder cone volcanoes
  • Composite volcanoes
  • Shield volcanoes
  • Lava dome volcanoes
• active volcano -is one that recently erupted or has had at least one eruption for the last 10 000 years.
• the most active volcano in the Philippines is the Mt. Mayon in Albay, Bicol that has erupted for 48 times. Its first record of eruption was in year 1616.
• Some active volcanoes in the Philippines are:

  • Mt. Kanlaon in Negros Islands
  • Mt. Pinatubo in Zambales
  • Taal Volcano in Batangas
  • Mt. Mayon in Albay, Bicol
• Dormant or inactive volcano -is once an active volcano that has not erupted for the last 10 000 years but still has a potential to erupt again.
• Extinct volcano - is a volcano that is no longer expected to erupt again.
• Pacific Ring of Fire -the area where earthquakes and volcanic activities frequently happens.
• the Pacific Ring of Fire has 452 volcanoes, making up 50% of the worlds active and dormant volcanoes.
• Volcanologists -are scientists who study volcanoes and their activity.
• Volcanology -the study of volcanoes.
• Lava - this is called when the hot magma goes out of the volcano.
• Magma -this is a melted rocks that forms a hot molten material called ______.
• the Earth has more than 1 500 active volcanoes.
• Plate tectonic theory -this theory stated that the earth is made up of plates that glides over the mantle.
• Lahar - a type of mudflow or debris from a volcanp that burried alot of towns, villages and rice paddies.
• Lahar is like a cement.
• Cinder cone volcanoes _ these volcanoes have circular or oval cone. They do not generally get more than 300 meters tall.
• Composite volcanoes -these are the volcanoes that have steep sides, although they are also shaped like cones. they can be tall as 2.4 kilometers.
• Shield volcanoes -they look like a shape of a bowl or shield, with long and gentle slopes made from basalt lava flows. the lava that flows form these volcanoes is called flood basalts.
• Lava dome volcanoes -are formed by thick lava, which makes a steep side mound as the lava piles up near the vent of the volcano.