How do volcanoes erupt?

Answer 1

they erupt just like they do above water

Answer 2

every 50,000 years

Answer 3

the extremely high temperatures underground melts rock, wich turns to magma, hot air rises so since there is so much pressure on it, it shoots to the surface and explodes. just think of it as a lava pimple.

Answer 4

Stratovolcanoes vary in how they erupt over time. At some times they will produce effusive eruptions that produce lava flows of varying compositions. Other times they will erupt explosively, sending out ash and cinders. Sometimes these explosive eruptions are absolutely massive, and can remove a significant amount of the mountain.

Answer 5

The eruptive history of most stratovolcanoes is delineated by highly explosive Plinian eruptions.They can send cubic miles of rock and ash into the atmosphere in an extremely violent series of eruptions.
The build up of extreme - really extreme - pressure beneath the surface from gases trapped in the magma trying to escape eventually breaks loose in a violent paroxysm, liberating enormous volumes of overlying rock, steam and ash into the atmosphere.
These dangerous eruptions are often associated with deadly pyroclastic flows composed of hot volcanic fragments and toxic gases that advance down slopes at hurricane-force speeds.
With some historically famous and cataclysmic volcanoes, the build up of pressure beneath the crust of the volcano was so extremely intense that the entire volcanic mountain blew up, leaving just the root of the original mountain remaining.

Here are 2 classic examples of these terrible explosions:
Krakatoa
In 1883 this volcanic island in the Sunda Strait experienced a series of extremely violent eruptions that sent ash over 50 miles up into the atmosphere and whose explosions could be heard 2,200 miles away. 36,000 people lost their lives on the nearby islands of Java and Sumatra when enormous tsunamis generated by the tremendous release of energy from the eruptions swept over the island. The eruptions ejected so much material from the interior of the volcano that when the eruptions were over, there was just a crescent-shaped fragment of the original island remaining. It completely blew itself up.
Tambora
In 1815 this Indonesian volcano erupted in a series of extremely violent explosions that are said to be the largest in recorded history. Ash was thrown 50 km into the atmosphere and global temperatures around the world fell an average of 3°C. Although it doesn't sound like much of a drop, in the higher latitudes the effect of the ash in the atmosphere cooled summer temperatures so much 1815 became known as the year without a summer.
source:http://www.extremescience.com/stratovolcanoes.htm

Answer 6

Froms from explosive eruptions of pyroclastic material followed by quieter flows of lava

Answer 7

ask someone else not the website plz

Answer 8

eruption big, big eruption