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S-6-6-2_Vocab Practice and KEY Name ____________________________________ Date ________________ Vocabulary Practice Directions: Fill in the blanks in the paragraph below with words from the box. cell current electrodes electrolyte electrical Ohm’s law potential difference voltage voltmeter resistance A ____________________ is a device that produces an electric current by changing chemical energy into ____________________ energy. Electric charges enter and exit it through the ____________________ at the ends. Inside, a substance that is a liquid or paste, called a(n) ____________________, conducts electricity. As long as there is a(n) ____________________ between the electrodes of a cell and there is a wire connecting them, charges will flow through the cell and the wire, creating an electric current. We can use a(n) ____________________ to measure the ____________________ in a cell. ____________________ shows the relationship between ____________________, voltage, and ____________________. The equation for this relationship is I = V/R. S-6-6-2_Vocab Practice and KEY Name ____________________________________ Date ________________ Vocabulary Practice--VERSION 2 (with vocabulary definitions) Directions: Fill in the blanks in the paragraph below with words from the box. cell current electrodes electrolyte electrical Ohm’s law potential difference voltage voltmeter resistance A ____________________ is a device that produces an electric current by changing chemical energy into ____________________ energy. Electric charges enter and exit it through the ____________________ at the ends. Inside, a substance that is a liquid or paste, called a(n) ____________________, conducts electricity. As long as there is a(n) ____________________ between the electrodes of a cell and there is a wire connecting them, charges will flow through the cell and the wire, creating an electric current. We can use a(n) ____________________ to measure the ____________________ in a cell. ____________________ shows the relationship between ____________________, voltage, and ____________________. The equation for this relationship is I = V/R. Vocabulary Definitions Cell: Device that produces an electric current by changing chemical energy into electrical energy. Current: The rate at which electric charge passes through a specific point; units are amperes, or “amps” (A), with the symbol “I” in the Ohm’s law equation. Electrode: Part of a cell through which electric charges enter and exit; all batteries have two electrodes, labeled “+” and “–”. Electrolyte: A liquid or paste that conducts electricity; found in batteries. Ohm’s Law: Describes the relationship between current, voltage, and resistance; I = V/R. Potential Difference: The energy per unit of charge; units are volts (V). Voltage: The difference in electric energy per unit of charge as a charge moves between two points; units are volts (V). Voltmeter: Device for measuring voltage. Resistance: The opposition to the flow of electric charge; units are ohms (Ω), with the symbol “R” in the Ohm’s law equation. S-6-6-2_Vocab Practice and KEY Name ____________________________________ Date ________________ Answer KEY Vocabulary Practice Directions: Fill in the blanks in the paragraph below with words from the box. cell current electrodes electrolyte electrical Ohm’s law potential difference voltage voltmeter resistance A cell is a device that produces an electric current by changing chemical energy into electrical energy. Electric charges enter and exit it through the electrodes at the ends. Inside, a substance that is a liquid or paste, called an electrolyte, conducts electricity. As long as there is a potential difference (or voltage) between the electrodes of a cell and there is a wire connecting them, charges will flow through the cell and the wire, creating an electric current. We can use a voltmeter to measure the voltage (or potential difference) in a cell. Ohm’s law shows the relationship between current, voltage, and resistance. The equation for it is I = V/R.
