Heat · Chapter 2: Conduction and convection
Year 11 Science · About 15 minutes with activities · Turn your sound on
Chapter 2 recap
- Conduction: kinetic energy passes from vibrating particles to neighbouring particles, without the material moving. It needs contact and usually happens in solids.
- Conductors (metals) have a sea of delocalised electrons, so they conduct heat readily. Insulators have no free flowing electrons, so they resist conduction.
- Convection: heated fluid expands, becomes less dense and rises; cooler fluid sinks, forming a convection current (kettles, sea breezes by day, land breezes by night).
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