Where does electricity in your house come from (the type that comes on when you flip a switch)?
A. Coal and oil are burned to heat up wires, which makes energy flow through wires. B. Humans mine rocks that are naturally magnetic and electric. These are made into large batteries. C. Humans heat up water and create steam in order to spin magnets near wires. D. Earth s magnetic field is used to create electricity. E. No one knows for sure where electricity comes from.