Sociales en ingles

an earthquake: is an earth movement caused by a released of preassure, it is messured with the richter scale from 0 to 12, there is an instrument to messure how strong is the earthquake  is called seismometer.  a volvano: is a pressure under the earth crust where the rock is in a semi-solid state , if pressure is released lava comes out.   - destructive margin:oceanic crust moves towards continental crust. collision margins: when two plates moving together are both continental crust. constructive margins: conwhen two plates moves apart. conservative margins: when two plates try to slide slowly past each other. the warm front which passes first is where the advancing warm air is forced to rise over the cold air and the cold front : is where the advancing cold air undercuts the warm air in front of it.