Volcanos

Volcanos

Types of volcano
1. Active volcano
  1. Erupts regularly for example Mount Etna in Italy
2. Dormant volcano
  1. Has not erupten for some time but could erupt again for example mount st helens wich erupted in 1980 after 120 years
3. Extinct volcano
  1. Has not erupted in historic times for example Slemish mountain, Co. Antrim
Volcanic mountain
1. Forms when mama moves up to the surface of the earth through a vent
  1. Vent is a small opening in the earths surface from which magma explodes onto the surface
2. magma is stored underground in a magma reservoir
  1. magma erupts out of the vent through the crater
    1. when magma reaches the earths surface it is lava, it cools down and hardens around the vent
      1. ash and other marerials are also ejected from the volcano
        After repeated eruptions ash and lava build up around the vent to form a cone shaped mountain
Positive effects
1. Volcanos can attract tourists
2. Fertile soil
3. Geothermal energy
4. Precious stones and minerals form
Negative effects
1. People get killed
2. Form mudflows
3. Roads and buildings destroyed

Resumo de Recurso

	Criado por maria zilbere quase 5 anos atrás