- Heat can be transferred from place to place by conduction, convection and radiation.
- dark matt sufaces are better at absorbing heat enegry than light shiny surfaces.
- energy can be lost from homes in many different ways but there are ways to solve this.
Heat transfer by conduction and convention
- Heat is a thermal energy.
- it can be transferred from one place to another by conduction, convention and radiation.
- conduation and convention involve particles, but radiation involves electromagnetic waves.
- Heat energy can move through a substance by conduction.
- Metals are good conductors of heat, but non-metals and gases are poor conductors.
- Poor conductors of heat are called insulators.
- The electrons in a piece of metal can leave their atoms and move about in the metal as free electrons.
- Liquids and gases are fluids.
- convention accours when particles with alot of heat energy in a lquid or gas move and take the place of particles with less energy.
- Liquids and gases expand when they are heated.
- All objects give out and take in thermal radiation, which is also called infrared radiation.
- the hotter the object is the more infrared radiation it emits.
- some surfaces are better than others at reflecting and absorbing…