Volcanoes aren't just cone shaped, they can also be wide plateaus, fissure vents or even dome shaped.
Volcanic eruptions can send ash up to 30km (17 miles) above the Earth's surface.
A volcano is an opening on the surface of a planet that allows material warmer than its surroundings to escape.
About 1,500 active volcanoes can be found around the world. Learn about the major types of volcanoes in this video.
Video credit: Thinking Captain
Video credit National Geographic
Watch these scientists trying to determine the potential effects of introducing water into a pocket of magma.
What Happens when Magma Meets Water?
Video credit:National Geographic
The tallest volcano in the solar system is on Mars.
You can find volcanoes on the ocean floor.