Volcanoes

What is a volcano? It is a vent or opening, on our planet’s surface where melted rock, called magma, can escape from inside the earth. The term volcano is also used the hills that forms when the escaping rock material piles up around the vent. Most vents are found inside craters and bowls shaped depressions often located at the top of a volcano.
When you see pictures of volcanoes they are usually erupting, theses are called active volcanoes but when a volcano is not erupting they are called dormant. In Lake Caldera, they are not erupting at the present time, but they have erupted in the last 100,000 years and may erupt again in the future. Volcanoes have not erupted for even longer then 10,000 years and are finished erupting are call extinct volcanoes.
We have six different types of volcanoes. The first one is called a shield volcano the largest of all volcanoes on earth. These volcanoes are mostly made up of basalt; a type of lava that is very watery once they are erup...