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thermal energy

the internal energy of matter

conduction

when heat is transferred through a solid and occurs when molecules in a substance collide, transferring energy from one molecule to the next

convection

when heat is transferred in liquids and gases; its molecules move farther apart and it becomes less dense

radiation

when heat is transferred through empty space in the forms of rays, waves, or particles and spreads outward from a central source

conductor

a material through which electric current passes easily

insulator

a material through which electric current does not pass easily

poles

a place on a magnet where magnetism is strongest

electromagnetic

a temporary magnet made when an electric current flows through a wire coil

heat

the flow of thermal energy from one place to another

generator

a machine that uses an energy source and magnet to make electricity

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