Activity 2 - learning about buoyancy.
In order to create an artificial habitats under the water, the materials have to get to the bottom of the ocean. So that they don't break up they have to be sunk slowly. In addition to this submarines carrying humans have to sink into the sea slowly so that the air in our bodies does not compress to fast from the pressure.
The children learned about how different ocean machines need to be positively, neutrally and negatively buoyant.
They created slowly sinking submarines.
Finally, the day was finished by watching the diver's clean the main tank. The children also learned about communicating under the water. Archie tried to call to him, but the glass was too thick!