Charging by contact - charging process in which electrons transfer to a neutral object that it touches, conduction - movement of charges through a substance, conductivity - ability of materials to allow electrons to move freely, conductor - material that allows electrons to change positions, electric charge - charged particles that exert an electric force on each other, electrical discharge - rapid transfer of electric charge, electron - negatively charged particle located outside nucleus of an atom, electron affinity - tendency of a substance to hold onto electrons, electroscope - instrument that can detect electric charges , electrostatics - study of electric charges, friction - force resisting relative motion of two surfaces in contact, grounding - process of connecting a charged object to Earth's surface, coulomb - metric unit of electric charge, induction - movement of electrons within a substance without direct contact, insulator - resists or blocks the movement of electrons, law of attraction - opposite charges attract, law of repulsion - like charges repel, lightning rod - metal pole with a wire attached to it that runs down to the ground, neutron - particle with no electric charge, nucleus - centre of the atom, contains with protons and neutrons, proton - positively charged particle in nucleus of atom, static charge - charges that are at rest and build up on the surface of an object, static electicity - imbalance of electric charges on the surface of a material,

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