Is that mountain shooting out lava?

Ever wonder why some mountains shoot out smoke? These mountains are called volcanoes, and we know that they can cause a lot of disasters. Volcanoes can form from islands.  But how are they created?

If we want to find out, then we need to figure out what's inside the middle of the Earth, because charts say that volcanoes get their lava from underground.

The Earth has an inner core, that is surrounded with an outer core, with a protecting mantle and lastly, the crust. Since the Earth's core is very hot, it melts the mantle into lava. Some of the mantle's lava goes up through the small cracks in the crust that reaches up to the surface, releasing lots of heat. From that, smoke sometimes comes up through the holes in the ground.

The lava starts to create volcanic rock layers on top of each other, eventually forming a cone-like shape. There are different types of volcanoes that have a faster flow of lava and some releases more lava, rocks and gas when it erupts.

Volcanoes are thought to be disastrous mountains, but if there were no volcanoes, we would not have islands that are divided.

Learning intention: We are learning to follow the structure of an explanation.

Success criteria: I know I can do this when I write about how volcanoes are formed.