Volcanoes

The video discusses the most active volcanoes and highlights that they are indicators of Earth's constant change. It defines a volcano as a site where molten rock, gases, and materials reach the surface, and explains the role of vents and the formation of lava. The video also notes that not all volcanoes behave the same way, as they vary in function and formation.

What does the presence of lava indicate about a volcano's activity?

How do volcanoes vary in their function and formation?