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_______ are very small particles that make up allmatter in the universe. Elements Cells Atoms Charges Label the parts of an atom: Electron ? Neutron ? Proton ? Nucleus Protons They are negatively charged particles: Electrons Neutrons They are positively charged particles: Protons Electrons Neutrons Nucleus This particles are neutral, they do not have a charge: Nucleus Protons Electrons Neutrons The positive and negative charges are the reason why electricity exists. True False Normally, an atom will have less protons than electrons, so the atom has a negative charge. Normally, an atom will have the same number of protonsand electrons, so altogether, the atom has a charge ofzero, it is neutral. Normally, an atom will have more protons than electrons,so the atom has a positive charge. What is true about atoms? _________ can move easily and pass from one atom to another. Protons Electrons Neutrons When an atom does not have the same number of protons and neutrons, the atom has what we call... an electric charge a generator a nucleus an electric circuit If an object has more protons than electrons, it has a... negative charge neutral charge positive charge Label: repel ? attract ? It is the flow of electric current through a conductor. Static electricity Static current Electric current An insulator When two objects come into contact with each other (for example, your hair and a balloon, pen with paper...), electrons pass from one object to another.Later they jump back to the positively charged object.We call this... Electric current Static electricity Circuit They are materials that transmit electric current easily. Conductors Insulators Resistors They are materials which only let a specific amountof electric current pass. Insulators Resistors Conductors They are materials that do not trasmit electric current easily. Conductors Insulators Resistors Conducting wire ? Receiver ? Label the drawing: Generator ? Switch ? True or false? A generator can be a light bulb or a motor. True False True or false? When the switch is in the position ON the circuit is closed and the electricity can pass. True False |