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Chapter Two
Review Questions 1. The general name given every substance in the physical universe is which of the following: a. Mass b. Matter c. Compound d. Nucleus 2. The smallest part of an element that retains all of its characteristics is which of the following: a. Atom b. Proton c. Compound d. Neutron 3. The particles that orbit around the center of an atom are called which of the following: a. Electrons b. Molecules c. Nucleus d. Protons 4. An atom that loses or gains one electron is called which of the following: a. Balanced b. An element c. A molecule d. An ion 5. Technician A says the battery provides electricity by releasing free electrons. Technician B says the battery stores energy in a chemical form. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B 6. Static electricity is being discussed. Technician A says that static electricity is electricity in motion. Technician B says an electrostatic charge can build up on the surface of your body. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B 7. What people discovered electricity? a. The Italians b. The Germans c. The Greeks d. The Irish
8. Technician A says batteries produce direct current from a chemical reaction. Technician B says that an electrolyte is a chemical solution of water and hydrochloric acid that will conduct electricity. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B 9. Two technicians are discussing thermoelectricity. Technician A says applying heat to the connection point of two dissimilar metals can create electron flow (electricity). Technician B says a thermocouple is a small device made of two dissimilar metals that gives off a low voltage when heated. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B 10. Technician A says when sunlight contacts certain materials, electron flow is stimulated. Technician B says solar energy is light energy from the moon that is gathered in a photovoltaic solar cell. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B 11. Two technicians are discussing how piezoelectricity works. Technician A says it is electricity produced when barium titanate is placed under pressure. Technician B says when no change in the potential of electrons between positive and negative terminal occurs, the barium titanate creates electricity. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B 12. James Watt’s term horsepower is being discussed. Technician A says one horsepower equals 33,000 foot-pounds of work per hour. Technician B says one horsepower would be produced when a horse walked 165 feet in one minute pulling
