Science Unit 2- Chapter 1

  1. Electricity
    A form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current
  2. Static charge 
    Static electricity refers to the build up of electric charge on the surface of objects
  3. Charging by friction
    When two objects rubbed together become charged due to electrons being transferred from one object to another.
  4. Electrostatic series
    A list that ranks the objects ability to take negative charges
  5. Insulator
    A substance that does not readily allow the passage of electrons
  6. Conductor
    Any of various substances that allow the flow of electric current or thermal energy
  7. Semiconductor
    A solid substance that has a conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects. Devices made ofsemiconductors, notably silicon, are essential components of most electronic circuits.
  8. Ground
    Electrical connection of a circuit or conductor to the earth
  9. Electroscope
    An instrument for detecting and measuring electricity, esp. as an indication of the ionization of air by radioactivity
  10. Charging by contact
    When a charged object touches another object. Electrons can be transferred through friction.
  11. Laws of electric charges
    The law that like charges repel, and unlike charges attract. Read more
  12. Electric field
    A region around a charged particle or object within which a force would be exerted on other charged particles or objects.
  13. Induced charge separation
    The movement of electrons in a substance, caused by the electric field of a nearby charged object, without direct contact between the substance and the object.
  14. Ion
    An atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
  15. Lightning rod
    A metal rod or wire fixed to an exposed part of a building or other tall structure to divert lightning harmlessly into the ground.
  16. Electrostatic precipitator
    • A device that removes suspended dust particles from a gas or exhaust by applying a high-voltage electrostatic charge and collecting the particles on charged plates
  17. Van de Graaff generator
    A Van de Graaff generator is an electrostatic generator which uses a moving belt to accumulate very high voltages on a hollow metal globe on the top of the stand.
  18. Radiation dosimeter
    Radiation dosimetry is the measurement and calculation of the absorbed dose in matter and tissue resulting from the exposure to indirect and direct ionizing radiation
Card Set
Science Unit 2- Chapter 1
Science Unit 2- Chapter 1