Light - a form of energy that can travel through space, Insulators - materials that do not allow electric charges to move through them easily, Parallel circuit - has more than one path for an electric current to flow, Series circuit - has only one path for electricity to flow through, Conduction - heat transfer through touch, Thermometer - a device used to measure temperature, Radiation - heat can be transmitted though empty space, does not rely on touch, Conductors - materials that let electric charges flow through them easily, Heat - the transfer of thermal energy from warmer to cooler objects,

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