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Science 9 – Unit D – Electricity Section 1.3 – Electrical Safety Name: ____________________________________ Pg. 284-285 Dangers of Electricity Define Short Circuit - ________________________________________________________________________ _________________________________________________________________________________________ Dangers of Electrical Shock Which is more likely to kill you? (Circle one) Voltage or Current Describe what might happen if you grab a wire that has a current 0.015 A to 0.020 A running through it? _________________________________________________________________________________________ _________________________________________________________________________________________ What current is enough to kill you? ___________________ Protecting yourself from Electrical Shock Define Insulators - __________________________________________________________________________ Examples of insulators - _____________________________________________________________________ List 5 Electrical Pointers 1) ____________________________________________________________________________________ 2) ____________________________________________________________________________________ 3) ____________________________________________________________________________________ 4) ____________________________________________________________________________________ 5) ____________________________________________________________________________________ Pg. 285 – 286 Plugs, Fuses and Breakers What does the ground on a plug do? ___________________________________________________________ How is a fuse and circuit breaker similar? ______________________________________________________________________________________ How is a fuse and circuit breaker different? ______________________________________________________________________________________ Pg. 287 Dangers of Lightning Lightning is a form of static or current electricity? __________________________ Practice Question Set 1: Pg. 287 Questions 5, 6, 7, 8, 9, 10 Pg. 288 Section 1.4 Cells and Batteries Define Electrochemical Cells - ________________________________________________________________ _________________________________________________________________________________________ They transform Chemical Energy to Electrical Energy All Cells are made up of 3 Parts (2 Electrodes and an Electrolyte) The Zinc and Copper act as Electrodes: Define Electrode: _____________________________________________ _____________________________________________ Copper is the Cathode, which means it is a metal that accepts electrons Zinc is the Anode, which means it is a metal that releases electrons The acid (in this case vinegar acts as the Electrolyte) Simple Wet Cell Define Electrolyte: __________________________________________________________________________ _________________________________________________________________________________________ Two main types: (Primary Cells) 1) Dry Cells (AAA, AA, C, D) What makes a Dry Cell “Dry”? __________________________________________________________ Label the parts: A) ________________________________________________________________ B) ________________________________________________________________ C) ________________________________________________________________ D) ________________________________________________________________ E) ________________________________________________________________ F) ________________________________________________________________ Pg. 289 2) Wet Cells (Car Batteries) What makes a Wet Cell “Wet”? _________________________________________________________ Pg. 290 Rechargeable Cells (Secondary Cells) Define Rechargeable Cell - __________________________________________________________________ Define Secondary Cells - ____________________________________________________________________ Practice Question Set 2 – Pg. 294 Questions 4, 5, 7, 9, 10