science

• Strato-volcano or Composite Volcano is the type of volcano many people think of when they imagine volcanoes.
• These volcanoes have broad bases and sides that get steeper and steeper as you get closer to the top.
• Composite volcanoes are also called stratovolcanoes because of the alternating layers, or strata, of which they are made.
• The magma that creates stratovolcanoes tends to be more viscous, or thick.
• Viscous lava creates greater pressure which, in turn, tends to create explosive eruptions.
• In addition, the viscous lava cannot travel far down the sides of the volcano before it solidifies.
• This viscous lava thus creates steep sides on stratovolcanoes.
• Shield Volcanoes get their name from their shape—a huge shield laid on its side.
• Shield volcanoes do not have the steep mountainous sides of composite volcanoes.
• Shield volcanoes have a very wide base and are much flatter on the top than composite volcano.
• Shield volcanoes are more common at spreading centers or volcanic hot spots in the middle of tectonic plates.
• The magma that creates shield volcanoes is less viscous, so it flows much more easily.
• For this reason, the eruptions of shield volcanoes are non-explosive and also, the less viscous lava spreads out more, which makes shield volcanoes much larger and flatter than stratovolcanoes.
• Cinder cones are both the most common type of volcano and also the smallest.
• The cinder cone resembles a composite volcano but on a much smaller scale.
• Cinder cones rarely reach even 300 meters in height but have even steeper sides than a composite volcano.
• Cinder cones usually have a crater at the summit.
• Cinder cones are composed of small fragments of rock piled on top of one another.
• These volcanoes usually do not produce streams of lava.
• Phreatic is a steam-blast small eruption as hot rocks heat the ground water.
• Phreatic eruption tears down surrounding rocks and can produce ash columns, but do not include new magma.
• Phreatomagmatic is a violent and explosive eruption resulting from the interaction of new magma or lava with water.
• Phreatomagmatic eruption results to a large column of very fine ash, high-speed and sideway emission of pyroclastic.
• Strombolian is the least violent type of explosive eruption characterized by a fountain of lava fragments.
• Strombolian eruptions are weak to a little more violent which has thicker lava flows and small explosions.
• Vulcanian are moderate explosive eruptions characterized by tall columns that reach up to 20 km high with pyroclastic flow and ashfall.
• Vulcanian eruptions have larger explosions of rocks and ashes which rise in dark clouds lasting for minutes.
• Plinian are excessively explosive type of eruption of gas and pyroclastic.
• Plinian eruptions, lasting for seconds to minutes, have 20 to 35 km tall gas, rock particles and ash columns.
• A volcano is a vent that connects magma form within the Earth’s crust.
• Warming is problematic because it causes severe weather, increasing sea levels, and biodiversity loss, all of which have negative effects on our health, economy, and environment.
• Strato-volcano or Composite Volcano is the type of volcano many people think of when they imagine volcanoes.
• These volcanoes have broad bases and sides that get steeper and steeper as you get closer to the top.
• Composite volcanoes are also called stratovolcanoes because of the alternating layers, or strata, of which they are made.
• The magma that creates stratovolcanoes tends to be more viscous, or thick.
• Viscous lava creates greater pressure which, in turn, tends to create explosive eruptions.
• In addition, the viscous lava cannot travel far down the sides of the volcano before it solidifies.
• This viscous lava thus creates steep sides on stratovolcanoes.
• Geothermal Energy refers to the heat from the earth.
• Shield Volcanoes get their name from their shape—a huge shield laid on its side.