Year 4 RNLI - Buoyancy

In Year 4 we have explored different aspects of buoyancy including:
– Shape
– Weight
– Displacement
– Ballast
– Pressure
– Stability
– Self righting boats


The RNLI are a charity which helps people when they need help on our coastlines. We had a member of the RNLI visit us to demonstrate that some things float and some things sink by dropping various articles and material of different shapes and weight into the water tank.

He showed us life jackets from 1900 - 2015. Here are some pictures

 

This was the very first type of life jacket

 

 We then designed our own life jackets using our new knowledge about buoyancy. Thinking about the right material and shape of the jacket was vital!

 

Here is a picture of our final life jacket design.