Download Science 9 - Unit D - Lesson 2 - Blank Notes

Science 9 – Unit D – Electricity
Section 1.3 – Electrical Safety
Name: ____________________________________
Pg. 284-285
Dangers of Electricity
Define Short Circuit - ________________________________________________________________________
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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?
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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