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Why do I need a battery?

Why do I need a battery?. Chapter 7 Section 2. What does a battery do?. Static discharge is the moving of electrons from one atom to another.

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Why do I need a battery?

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  1. Why do I need a battery? Chapter 7 Section 2

  2. What does a battery do? • Static discharge is the moving of electrons from one atom to another. • In order to keep the electrons moving through the circuit, there has to be something that causes a push, or a voltage difference- a battery does just that…

  3. How do batteries work? • Batteries create an uneven level of electrons which causes the electrons to move from a high concentration to a low concentration… • This is also known as the voltage difference..

  4. Dry-Cell Batteries • Where do you find these? • Name at least three places you use these…

  5. Dry Cell Batteries • There are two main parts on a battery that creates the voltage difference… • The positive and negative ends… • Do you know which is which ?

  6. Parts of the Dry Cell • Positive End • Plastic Insulator • Moist Paste • Carbon Rod • Zinc Container • Negative Terminal

  7. How does a Dry Cell Work? • When the circuit is closed, and the battery is connected, a chemical reaction starts the process. • The chemical reaction with zinc and several other chemicals occurs in the moist paste.

  8. How does a Dry Cell Work? • The carbon rod acts as a conductor and transfers electrons. • The carbon rod is not part of the reaction happening in the moist paste. • But…the chemical reaction in the moist paste does cause the carbon rod to become charged. • This charge on the carbon rod creates a positive end. • The negative end is made by the Zinc.

  9. How does a Dry Cell Work? • The voltage difference between the positive and negative ends causes the current to flow. • By connecting more batteries you increase the voltage difference. • List three things that needs more than one battery to work…

  10. Wet Cell Batteries… • What is a wet cell battery? • A battery that contains two connected plates made of different metals or metallic compounds in a conducting solution. • Can you list three places you have seen or used a wet cell battery?

  11. Parts of a Wet Cell Battery • Positive end • Negative end • Lead Plate • Battery Solution • Partition • Lead dioxide plate

  12. THE BATTERY WEBSITE • http://www.energizer.com/learning/howbatterieswork.asp

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