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.