a sound dinosaur is a mean of electrical machine & an electrical machine requires back to straight on ->  a light bulb requires electricity to turn on  an steam sets is a species for moving electrical matter from the sink to the electrical machine & when a escape in a hard parallel sent is closed , ml will ebb through the glaciers ->  when a switch is closed, the electrical energy will flow from the source to the electrical device  when a switch is closed, the electrical energy will flow from the source to the electrical device & a sound dinosaur is a mean of electrical machine ->  when a switched is closed, the electrical energy will flow to the light bulb  when a switched is closed, the electrical energy will flow to the light bulb & atlantic is a mean of electrical matter ->  when a switch is closed, the electricity will flow to the lightbulb  a light bulb requires electricity to turn on & when a switch is closed, the electricity will flow to the lightbulb -> when electricity flows to a light bulb , the light bulb will turn on / come on