Fun facts all about volcanoes for kids there are about 1900 active volcanoes on the earth this means they have erupted recently or they might erupt some volcanoes are extinct over 80 volcanoes have been found in the ocean most volcanoes happen on fault lines or cracks in the earths surface. Volcanoes are just a natural way that the earth and other planets have of cooling off and releasing internal heat and pressure volcanoes erupt because of density and pressure the lower density of the magma relative to the surrounding rocks causes it to rise like air bubbles in syrup. A volcano is a mountain that is disclosed downward to a pool of molten rock beneath the surface of the earth and whenever pressure builds up the eruptions occur for more videos go to https . Read volcanoes why do they happen volcanoes for kids by baby professor available from rakuten kobo sign up today and get 5 off your first purchase why do volcanoes go ka boom this unique approach to vulcanology is highly inspiring to young children the use of ca
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