VOLCANOES

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

The largest active volcano in the world is Mauna Loa, on the Hawaiian islands.

There are volcanoes on other planets in the Solar System.

There are more 500 active volcanoes on Earth.

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

Volcanoes get smaller when they erupt.

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

Volcanoes can be active , dormant , or extinct.

Ash from volcanoes isn't very good for growing things. It doesn't adds nutrients to the soil.

There are some volcanoes in Brazil.