1. Agenda for Wednesday Jan 4 th 1.Battery reading page C-34 – C-36 2.Battery Notes 3.Battery Lab (as demo)

2. Batteries A battery has two ends – positive terminal and a negative Connect the terminals to create a circuit – Creates flow of electrons to produce electricity Batteries can be stored because the chemical process won’t start until the electrons flow

3. How batteries work When zinc is inserted into an acid, the acid begins to eat away at the zinc – The process releases electrons If a rod of carbon is inserted into the acid, the acid does nothing to it. If you connect the carbon rod to the zinc rod (wire), creating a circuit, electrons will begin to flow through the wire When the zinc rod is completely dissolved the battery can no longer be used.

4. Types of Batteries Alkaline battery – Duracell® and Energizer® Lead-acid battery – These are used in cars Lithium battery –cameras for the flash bulb Lithium-ion battery – These batteries are found in laptop computers, cell phones Nickel-cadmium or NiCad battery Zinc-carbon battery or standard carbon battery – regular or standard AA, C and D dry-cell batteries.

5. Agenda for Thursday Jan 5 th 1.Battery readings 2.Electrical Appliance Survey

6. Readings Read pages C-42 – C43 and answer challenge question Read C-44 – C46 and answer questions on page C-46

7. Energy Use YearEnergy Used Per Capita 19505.3 19555.7 19605.9 19656.5 19707.8 19757.9 19807.5 19857.0 19908.2 20008.9

10. Electrical Appliance Survey Read page C-47 and C-48 and answer the following questions What kind of energy was required in 1902? What was the main source of energy in 1902?

11. Electrical Appliance Survey Read page C-49 and Page C-50 Answer the following questions What is the message in the old ad? Give two examples of this message. What is the message in the new ad? Give one example. How have the ideas of energy changed over time?

12. Appliance Survey Page C-51