there once used to be a big volcano called vinny the valcano. Vinny used to be filled with magma, magma is molten rocks. But now vinny on the bridge of extinction .     -master wu 

A volcano is an opening in the Earth's crust that allows magma to escape.

Yes that's true!

Vinny used to be very powerful she was along the ring of fire. The ring of fire had many volcanos that were along tetconic plates including the volcanos lover, master wu

Master wu on the other hand had much lava, lava is molten rock ( like magma) broken through the surface and master wu is still active to this day.

I still have much magma, and there is much more in my magma chamber.

A magma chamber is a big chamber in the volcano storing magma

Volcanoes also have vents!
A vent is where the magma escapes and erupts into the air!
Eruption is when magma escapes out the vents!