Science

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miller

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  • I am Alfred Wegener, I am the one who develop the Theory of Continental Drift. This theory stated that the world was once together in one piece of land called Pangea but, that continents drifted apart creating 7 continents. 
  • Pangea
  • Transform
  • The figure above shows transforms boundary.  The tension at this boundary is called shearing, this boundary is also called strike slip fault.
  • Convergent
  • Oceanic Crust
  • This figure shows convergent boundary.  Oceanic crust goes under the continental crust this is called subduction. This happens because the oceanic crust is denser and made up of compacted basalt and continental crust is made up of less denser granite.
  • Continental Crust
  • This shows how the divergent boundary moves due to magma heating the water causing convection currents to pull/ spread the sea floor apart.
  • Divergent
  • 
  • Magma
  • mid ocean ridge
  • There are 2 types of waves; p and s waves. P waves are the primary wave that can go through all types of matter. S waves are the secondary and slowest wave of the 2 and can only travel through solids.
  • Earthquakes  
  • Earthquakes are found by by using triangulation. Which means 3 are drawn and where all three met is the epicenter or where the hurricane is happening. 
  • Earthquakes happen everyday and are measured by seismographs. These graphs measure seismic waves
  • There are three types of volcanoes cinder, shield, and composite. Shield volcanoes are built from layers of lava from non explosive eruptions. Cinder volcanoes are cones made of pyroclastic material from moderate eruptions. Composite volcanoes are formed by explosive eruptions followed by pouring lava. Lastly, 75% of all active volcanoes lie on the pacific plate. There are sso many volcanoes if is called the "Ring of Fire".
  • Volcanoes
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