8th grade-ch. 2 sec. 3 batteries
DESCRIPTION
TRANSCRIPT
Ch. 2 Sec. 3 Batteries
Luigi Galvani
• made frog leg move
• thought it was b/c of “animal electricity”
Luigi Galvani
Though Luigi Galvani
erroneously concluded that
the frog's nervous system
generated an electrical charge,
his work stimulated much research into the electrical nature of the nervous
impulse.
Alessandro Volta•Italian scientist who built 1st electric battery out of silver, zinc & paper soaked in salt H20
Alessandro Volta• Said that Galvani made frog leg move b/c of chemical reaction= process in which substances change into new substances w/ diff. properties
electrochemical cell
• Device that converts chemical energy electrical energy
• Made of 2 different metals (electrodes)–Partially immersed in an
electrolyte= device that conducts electric current
terminal• Part of an electrode above
surface of the electrolyte
battery•combination of 2 or more electrochemical cells in a series
•store chemical energy
2 kinds of electrochemical
cells:
1. wet cell•electrolyte = liquid
2. dry cell (alkaline)
•electrolyte = paste
Object Voltage 1 D battery
2 D batteries3 D batteries
Activity-Find the voltage