1. Section 1.2 – Current Electricity

2. Focusing Questions What exactly is electricity?
What is needed for electricity to move?
What scientific principles are at work when a balloon is charged against someone’s head and held against a wall?

3. Current Electricity **Measured in amperes (amps)
**Current is how fast the electrons
are flowing

4. NEEDED: (1) Complete Path (2) Energy Source
Electric Circuits
NEEDED: (1) Complete Path (2) Energy Source

5. Conductor
material that electrical charge can move through easily

6. LOAD
device in a circuit that converts electrical energy to another form of energy

7. VOLTAGE
measure of how much electrically charged particles carry. Measured in volts.

8. Voltmeter
*Meter to measure voltage

9. Difference between amperes and voltage
Let’s say you have a garden hose turned on,
but the nozzle is closed. You have pressure
in the hose (voltage) but not flow (amperes).
The flow or current is the amperes.

10. Section 1.1 – Static Electricity

11. Focusing Questions What exactly is electricity?
What is needed for electricity to move?
What scientific principles are at work when a balloon is charged against someone’s head and held against a wall?

12. Charge Separation
Concentration of like charges in specific areas of a neutral object, caused by the approach of a charged object

13. Static Electricity

14. Laws of Electric Charge
Opposite charged attract each other
Like charges repel each other

15. Section 1.3 - Electrical Safety

16. Short Circuit

17. INSULATORS
A substance that does not readily allow the passage of electricity

18. 3 Prong Plug

19. Electrical Fuse Box

20. Section 1.4 – Types of Cells

21. Focusing Questions:
What are the properties of electrochemical wet cells?
What type of energy is changed into electrical energy in dry cells?

22. DRY CELLS APPLICATION - Batteries

23. Electrochemical Wet Cell

24. Wet Cell Application
Car Battery

25. ELECTROLYTE
liquid or paste that conducts electricity because it contains ions

26. What is happening in the wet cell to produce electricity?
Ionic Compound (ex: NaCl) When placed in water it separates into Na+ and Cl- The “charged” solution allows electricity to flow through it and the electrons get attracted to the negative electrode (-) (this is compared to a molecular compound like sugar [C6H12O6] that does not break in solution)
Electrode means metals
**They have to be different

27. what energy transformation occurs in a dry cell?
Why do the anode and cathode electrodes
need to be made of different metals?

28. Lab Series Blow a Fuse – Page 286
Need to have 3 circuit diagrams + the answers the following 3 questions:
(1) What happens to the steel wool with 1.5V, 3V, 4.5V?
(2) How does this compare to a fuse?
(3) If the resistance of the steel wool is 2ohms, how much current did it take to blow the fuse?
Fruit Cells – Page 289(290) – Demonstration Only
BONUS QUESTION
What is it about some fruits that allows them to conduct electricity? (Use scientific language; use the internet if necessary; write it in your own words)
Choosing Electrolytes Lab – Page 291
Need Variables, 6 Circuit Diagrams, answers to questions 9-11 on page 291 (Use scientific language; use the internet if necessary; write it in your own words)