1. Electrochemical Reactions

2. Anode: Electrons are lost due to oxidation. (negative electrode) Cathode: Electrons are gained due to reduction. (positive electrode) Electrolyte: The medium that carries the ions or electric charges. Separator: Keeps electrodes from touching. (cloth or paper) Collectors/electrodes: collects current to be used in the outside circuit.

3. Cu Zn SO 4 -2 Cu +2 Zn +2 Cu +2 Zn +2 e- e- Zn +2 e- e- Loss of electrons OXIDATION Gain of electrons REDUCTION

4.  http://www.youtube.com/watch?v=0oSqPDD2r MA http://www.youtube.com/watch?v=0oSqPDD2r MA

5.  http://www.magnet.fsu.edu/education/tutorial s/java/daniellcell/index.html http://www.magnet.fsu.edu/education/tutorial s/java/daniellcell/index.html

6.  http://www.youtube.com/watch?v=edMN7P5o CaY http://www.youtube.com/watch?v=edMN7P5o CaY

7. All of the “batteries” pictured are really just single POWER CELLS. They have only one cathode and one anode. All of these power cells have a voltage of 1.5 regardless of size!

8. A true BATTERY is actually several power cells connected together. A 9-volt battery is six 1.5V power cells connected to each other. A car battery is a combination of enough power cells to equal 12 volts.

9.  http://www.youtube.com/watch?v=4IgHj2Uim_ 0&feature=related http://www.youtube.com/watch?v=4IgHj2Uim_ 0&feature=related

10. Most electronic devices run on a combination of power cells. This combination can increase the life of the battery or increase the voltage supplied to the circuit.

13.  http://www.youtube.com/watch?NR=1&feature=e ndscreen&v=iRnZNq_6ijI http://www.youtube.com/watch?NR=1&feature=e ndscreen&v=iRnZNq_6ijI  http://www.youtube.com/watch?NR=1&v=sDTUEB NJhv8&feature=endscreen http://www.youtube.com/watch?NR=1&v=sDTUEB NJhv8&feature=endscreen  http://www.youtube.com/watch?v=aaAHq1yh1vk &NR=1&feature=endscreen http://www.youtube.com/watch?v=aaAHq1yh1vk &NR=1&feature=endscreen  http://www.youtube.com/watch?v=iubyEuNbyjw& NR=1&feature=endscreen http://www.youtube.com/watch?v=iubyEuNbyjw& NR=1&feature=endscreen  http://www.youtube.com/watch?NR=1&v=y2RQtt pahqk&feature=endscreen http://www.youtube.com/watch?NR=1&v=y2RQtt pahqk&feature=endscreen

14.  http://www.youtube.com/watch?v=IpaEGhjpZg c&feature=related http://www.youtube.com/watch?v=IpaEGhjpZg c&feature=related  http://www.youtube.com/watch?v=nZjMARe6A Ps&feature=relmfu http://www.youtube.com/watch?v=nZjMARe6A Ps&feature=relmfu

15.  Electrical current that flows only in one direction (D.C.)  Electrical current that flows in one direction then the opposite direction (A.C.)

16. II  Quantity of electrons that pass a given point in a given time  Ampere  1 ampere is 6,250,000,000,000,000,000 electrons passing a point in 1 second  1 amp = 1,000 mA

17. VV  The electrical pressure or force  Sometimes referred to as electric potential  The difference in electrical potential energy between two points  Measured in volts

18.  The work performed by an electrical current  Units: Watts  The power of a Direct Current is its voltage times its current  Power is also equivalent to energy per unit time and also work per unit time P=Vx I or P= energy/time or P =work/time *energy would = P * t and units are Watthr or kWhr

19. RR  The degree to which a conductor hinders the charge flow  Ohm  A potential difference of 1 V will force a current of 1 amp through a resistance of 1 ohm

20.  V = I x R