Ice Balloons

We had a lot of fun finding out more about the properties of ice today. We investigated ice balloons. First we made observations about them, noticing things like the cracks and bubbles in them, how cold and hard they were and how icicle like shapes fan out from the centre. We also tried different methods of getting Lego men that were frozen into them, out. This let us see things like the fact that heat from a hair dryer or salt will melt a block of ice but there is a lot of energy in the ice so it is a slower process than we had expected. We also watched an information video about why ice floats.

The salt water that drips down from where the salt was put at the top, creates melted channels down the sides.