Prediction about The Cay

From what I can see from the front of the book It looks like the older man is teaching the young boy how to put bait on a hook on the fishing rod. the young boy's shirt is ripped so he might have been in a shipwreck and it even says at the back that him and his mother's ship sunk. So I think it's gonna be about how he and the old man at stranded and help keep each other alive.  

Convection & Conduction

 Hurumanu 3- Chemicals and Chaos 

Convection and Conduction are both types of heat transfer, it is when energy is passed from cold to hot. It is about passing on heat.

When something heats up the particles move faster and faster so when they bump into each other they transfer heat because they are being in contact.

Conduction- it passes the heat energy through contact.  Good thermal conductor- can pass on heat. eg. stovetops and kettles 

Thermal insulator- does not pass on heat. (bad conductor for when you want heat) eg. house insolation and thermals. Thermal insulator traps heat in because they don't conduct heat. 

A good thermal conductor can be a good and bad thing as well as a bad conductor. 

Convection- It is when heat energy is transferred without needing to be touched, it is usually in liquid. eg heaters and hot air balloons  

The process continues eventually the whole liquid would get heated up. the process is called Convection Currents 

- Hot stuff rises, cold stuff sinks 

Teabag rocket 

When we lit the teabag on fire the particles spread out and were less dense making the teabag go up because it is light. When the ashes reach the top it becomes cold and the particles become compacted, denser and heavy, making them come back down.