Duplicate of VOLCANOES

A volcano is a mounting opening in the Earth's crust through which ash and lava erupt

There are more 500 active volcanoes on Earth.

Volcanoes can be active , dormant , or extinct.

Dormant Volcanoes are not active but might be in the future

Volcanoes get smaller when they erupt.

About 75% of the world's active volcanoes are under water

When a volcano erupts, magma comes up and out through the vents. Magma is called lava when it’s outside the volcano.

When the top of an underwater volcano reaches abovded the water it becomes an island

Lava can also flow away from the volcano causing changes to the land

Many volcanoes are mountains, made up of layers of lava and ash.