Презентация на тему "Volcanoes"

Содержание

• 
  Слайд 1

  Volcanoes 

• 
  Слайд 2
  

  A volcano is an opening, or rupture, in the surface or crust of the Earth or a planetary mass object, which allows hot lava, volcanic ash and gases to escape from the magma chamber below the surface.

• 
  Слайд 3
  

  On Earth, volcanoes are generally found where tectonic plates are diverging or converging.

• 
  Слайд 4
  

  There are three common types of volcano: composite volcanoes, often the most deadly;  shield volcanoes, which are large but generally less violent; cinder cones.

• 
  Слайд 5
  

  Erupting volcanoes can pose many hazards, not only in the immediate vicinity of the eruption.

• 
  Слайд 6
  

  Lava has a temperature of more than 1200 °C, the rate of 2 to 40 kilometers

• 
  Слайд 7
  

  The largest volcanoon Earth is Hawaii's  Mauna Loa. It is about 10 km tall from the sea floor to its summit (it rises about 4 km above sea level).

• 
  Слайд 8
  

  The most active volcano in the continental USA isMt. St. Helens (located inwestern Washington state).

• 
  Слайд 9
  

  Volcanic eruptions continue posing ever-greater threats to life and property.

• 
  Слайд 10
  

  South of Mexico City, Popocatpetl has begun tocome to life again.

• 
  Слайд 11
  

  Another million people living in the Naples area are threatened by Mt. Vesuvius' continued unrest.

• 
  Слайд 12

  THE END