Why do volcanoes errupt? by Miss.Morris

In a volcanic eruption, hot lava spews out from beneath the Earth's crust up to the Earth's surface. This lava is actually hot melted rock called magma. Just underneath the Earth's crust is a layer called the mantle, which is made of up plates that are always moving and shifting. Sometimes the plates separate. That creates heat and causes the mantle to melt into magma. The magma comes up through the crack between the plates. It spreads out, cools down, and becomes rock again. The solid magma stays beneath the Earth's surface. Sometimes the plates collide. When that happens, one plate can slide under the other. This also causes the mantle underneath to melt. The magma pushes upward, melting more rock. The hot magma collects under the surface of the Earth. If the pressure is high enough or a crack opens in the crust, the magma spews out. Now it is called lava.

2013-09-10 02:10:06 UTC

by:Ziyad

2013-09-10 02:10:57 UTC

valcanoes may blow up (errupt) as they are active

2013-09-10 02:17:24 UTC

Words we need in our explanation:

Errupt

Heat

Magma

Erruption

Melts

Volcano

Lava

Chambers

2013-09-10 02:30:28 UTC

volconoes errupt because

morris_amanda_l — 2013-09-10 02:35:43 UTC

The main reason for the eruptions from volcanoes is the heat deep within the Earth's mantle.

This heat slowly melts rocks to create a slow moving substance called magma.

Magma is lighter than the solid rock around it so magma rises and collects in magma chambers.

After a while the magma pushes through vents and fissures in the earth's surface.

Then a volcanic eruption occurs! The magma comes out of the volcano and is now called lava.

2013-09-10 02:42:17 UTC

cant get my facts copy caters