volcanoes
How are volcanoes formed
Volcanoes are formed when magma from within the Earth's upper mantle works its way to the surface
What are the 4 types of volcanoes
cinder cones, composite volcanoes, shield volcanoes, and lava domes.
What is the difference between a volcano and a caldera?
A caldera is a massive crater-like bowl that forms after a volcanic eruption and/or the collapse of a volcano. A volcano is a vent or fissure which contains a magma chamber and can erupt with lava or volcanic gasses through the surface of the earth.
how long does a volcano eruption last
Most eruptions last hours but some continue for weeks and months.
what is crater and calderas
a volcanic crater i an opeing or depression at the top of a volcano