True: When static attraction is strong enough, negative charges can jump to positive charges., A scrubber can be used to clean air using static electricity in a factory., Thunder is the sound we hear when lightning discharges., It is easier for static charges to build in drier weather than humid weather., We can charge objects even if they do not physically touch each other., A fuse works by opening a circuit when it melts., A transformer will increase voltage to send it long distances., Speakers, computer, hard drives and electric motors have electromagnets in them., Solar cells change light into electrical energy., A generator changes moving energy into electricity., In an electric circuit, only the negative charges can move through the wires., In a parallel circuit with 3 bulbs, if 1 blows, the other 2 can still work., Most kinds of metals are good conductors., When an electric discharge happens in nature, it is the object tyring to become neutral again., We call the build-up of electric charge on an object static electricity., False: Only the positive charges in an atom can move., Two negative charges will attract to each other., An example of a conductor would be an eraser., An atom with no total charges will have two negative charges and three positive charges., We can measure voltage in (kg)., Electronmagnets can only be turned on, but not off., If one bulb blows in a series circuit that has 5 bulbs, the other 4 will still work., Batteries are useful because they can make their own electricity., If a circuit is open, it means electricity can flow., Plastic, wood, water and metal are good insulators., Most kinds of metals are good insulators., We call an electric path that has more than one path for electrons to move through parallel current.,

Science: Static Electricity, Electricity (Grade 4)

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