* Can we get some benefit from volcanoes? Yes, with the material ejected by volcanoes can get grinding stones, industrial abrasives, toilet articles, linings, etc ... You can also take advantage of the hot springs for medicinal purposes and for electricity and heating.
* Why is lava hot? Because it comes from inside the Earth and the more we get into it, the temperature rises.
* How long can you live volcano? Hundreds of thousands of years. Etna has an approximate age of 300,000 years.
* How do we know that a volcano will erupt? You can see several signs that allow to know: there are variations in temperature, ground deformation, earthquakes increase, emit more gas, the animals show signs of nervousness and water sources disappear or change in composition.
* Caused the volcanoes the demise of the dinosaurs? No one knows for sure. 65 million years ago there were two disasters on Earth at the same time: the impact of a large meteorite in the Gulf of Mexico and a series of violent volcanic eruptions in India. Scientists are studying to what extent this fact influenced each of these two events.
* Who was the first volcanologist? In 79 AD, Pliny the Younger watched the eruption of Vesuvius 30 km away and wrote several letters telling their observations.
* What have been the eruptions have claimed more victims? "Tambora. 1815. 92,000 dead, Montaña Pelada (Martinique). 1902. 28,000 dead-Santa Maria (Guatemala). 1902 6.000 dead .. -El Chichon (Mexico). 1982. 3,500 killed. "Nevado del Ruiz (Colombia). 1985. 24,000 deaths. -Pinatubo (Philippines). 1991. 600 dead.
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