Name______
Worksheet
Terms. The following terms are presented in this lesson (shown in bold italics):
Alternating current
Atoms
Battery
Conductors
Conventional theory
Cycle
Direct current
Electricity
Electrodes
Electrolyte
Electromagnet
Electron theory
Electrons
Elements
Free electrons
Friction
Fuel cell
Hertz
Insulators
Magnetic induction
Neutrons
Photovoltaic effect
Polarity
Primary batteries
Protons
Secondary batteries
Semiconductors
Solar (photo) cell
Synchronous alternator
Thermocouple
Thermopile
Valence
Lesson C7–2: Exploring the Science of Electricity
Part One: Matching
Instructions. Match the term with the correct response. Write the letter of the term by the definition.
a. Electrons e. Electricity
b. Solar cell f. Electrode
c. Elements g. Electrolyte
d. Semiconductors h. Thermocouple
______1. Used for converting light into electricity through a process known as photovoltaic
effect.
______2. The flow of electrons from atom to atom in a conductor.
______3. The joining of two dissimilar metals, such as iron and nickel, to generate electricity.
______4. The name given for two dissimilar metal plates within a cell of a battery used in
generating electricity.
______5. Substances that cannot be broken down into simpler substances using ordinary
chemical methods.
______6. A chemical solution that contains positively and negatively charged atoms called
ions.
______7. Contain a negative electrical charge and orbit the nucleus of an atom in rings or
shells.
______8. Materials that are neither good conductors nor good insulators.
Part Two: Completion
Instructions. Provide the word or words to complete the following statements.
1. ______batteries are made of lead-acid or nickel-cadmium and can be recharged,
while ______batteries are made of carbon-zinc or alkaline and
cannot be recharged.
2. An ______is created using electricity. It is the result of electricity
flowing through an insulated conductor that is wound around a metal object.
Kentucky Agricultural Education Lesson Plan Library — AgriScience
Unit C. Problem Area 7. Lesson 2. Page 10.
3. The term ______is used to represent one cycle of electricity per second.
4. The nucleus of an atom contains ______which have a positive electrical
charge and ______which have no electrical charge.
Part Three: Short Answer
Instructions. Provide information to answer the following questions.
1. Contrast the conventional theory vs. the electron theory of electricity.
2. Explain the difference between direct current and alternating current.