Kea News Week 4

Buoyant or Negative Buoyancy?

Buoyant or Negative Buoyant? Yesterday we made hypotheses about what items might sink or float. If an item floats it is buoyant. We found that items with heavy weights were negatively buoyant. However, we tested Coca-cola and diet Coca-cola. They had the same amount of liquid and weight. The Coca-cola sank but the diet coca cola was buoyant. This is because the Coca-cola was more dense (contains more sugar and chemical materials). What we noticed about the maths block was it was buoyant because it is made of wood. Different types of wood can be more dense than other types of wood. We concluded that the surface area of an object can affect how well it stays buoyant.

Kea News Week 3

Raft Building Experiment

Did you know Kea attempted to design and create a raft that could float on water? First, we had to brainstorm what material we had to use, and design what we wanted to build. Next, we had to prototype our raft to see if it would float or sink. Finally, we tested it with strong and weak water by shaking the water tub to make it rough. Most of our rafts survived the rough turbulent waves that we created from shaking the tub, while some sucumbed to the elements of water and wind.

Kea News Week 1 & 2