The Magic School Bus - Blows Its Top - Ep. 14

According to Ms. Frizzle, there is an island so new it has yet to be discovered. Carlos wants to name it "Carlos Island", but Dorothy Ann has decided to get a name by looking in a book. However when they arrive, there is no island. Ms. Frizzle says it has not arrived yet. In the end, it is revealed that it was created by an underwater volcano.