Supervolcano

A supervolcano is a very big volcano. It is so big that when it erupts, it can cause a lot of destruction. It can shoot out really hot lava, rocks, mud, and ash into the sky. That can cover a lot of land and kill lots of people or animals. It can also block out the sunlight and make the climate colder. That can lead to a cooling of the world and crops not growing as well.