VOLCANOES

There are more 500 active volcanoes on Earth.

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

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

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

Volcanoes can be active , dormant , or extinct.

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

Volcanoes get smaller when they erupt.

There are volcanoes on other planets in the Solar System.

There are some volcanoes in Brazil.

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