Lava Flow types: Aa and Pahoehoe
I show this video during my unit on volcanoes when discussing the two Hawaiian volcano flow types, Pahoehoe and aa lavas. It shows both very well and I have the students shout out what type as the video plays. There is also a great view as to what a shield volcano looks like so I pause it at that point to discuss why a shield volcano takes on the shape that it does. I also talk about the cooling of the lava and how it hardens and turns into solid basalt.