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.
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