Periods 1, 2, 4, 6 & 7: 
ON the back of your worksheet "Three-Level Reading Guide", Answer Analysis Questions  from p. B-59 of the text:  
1. Describe the changes that occurred during the etching process in: 
a. your circuit board;
b. the copper chloride etching solution. 

2. What do you think should be done with the used copper chloride
etching solution?

3. Etching circuit boards creates large amounts of copper-containing toxic waste. What ways can you think of to reduce the amount of copper-containing toxic waste produced in the U.S.?
 
Notes that you missed if you weren't here on 3/15 (make sure that you have all of these notes in your science notebook, and have all of the vocab terms in your vocab section):

Date: March 15, 2017

Topic: Producing Circuit Boards

Obj: TSW:

• demonstrate the simulated etching of a computer circuit board, and
• read about the manufacture of a computer circuit board and the resulting waste.
Key words (write each of these words in notes, and define each in your vocab section):
• Monomer - "one part" - molecules that repeat and are linked together to form polymer.
• Polymer - "many parts" are made of repeating molecules (monomers) linked together. Ex: plastics, rubber, starch.
• chemical change - change that produces "new" or different substances.
• chemical reactions - take place when one or more substances change chemically into another substance or substances. Signs: material gives off smoke, heat, light, or a new odor, or forms a precipitate. (Reactants go into a chemical reaction and then form products, which are substances different than the reactants).
• Circuit board - essential part of a computer that works like a wiring system to transfer electrictiy to operating parts of the computer.
• Etching - a chemical process used to create the copper paths on the circuit board that allows electricity to travel.