January 2009 Archives

The concepts of weight and gravity were discussed, and the lack of relationship between horizontal speeds and the vertical speeds of falling objects were introduced.

Students were introduced to the required publications concerning Performance Assessment 3 for Chemistry. It will be due in its final form on February 9th.
Here is the PA
PA3Spring2009.doc
Here is the blank Lab Report
LRCHEM2009.doc
Here is the Iron-Copper Stoichiometry lab for Thursday, Jan. 29th:
Stoichiometry Lab with iron and copper sulfate Spring 2009 (3).doc

Newton's Laws of motion were reviewed, and Newton's Third Law was explained. Students were asked to classify the forms of friction as a force that opposes all motion.

We completed the following acceleration worksheets:

PSif0017.bmp

We will complete the Serious Stoich Lab tomorrow. Students were given a copy of the laboratory to look over before we begin.

Today, they completed a series of stoichiometry problems:
p. 393 -
# 62, 66, 69, 79, 90, 97

We spent the last couple of days working on Stoichiometry reactions.
Essentially, four possible outcomes were determined:

Converting mass to moles
Determine the limiting reactant
Finding a specific amount of a product
Determining amounts of excess reactants available after a reaction

Students were instructed on how to determine mole ratios from a balanced equation.

Students were asked to complete either #11 or #12 on page 375 as an exercise out of class time.

Instruction was differentiated today, with the students attempting three distinct activities:

• Students went into the hallway to gather data for their "Gravity Racers" laboratory;
• Students were asked to complete a "Distance Time Graphing" activity
• Graphing Distance 1.bmp
  
• Graphing Distance 2.bmp
  
• Students were asked to list and define the chapter vocabulary on page 62. There will be a quiz on Friday for the Chapter vocabulary.

Solutions to the homework were presented.
Students read, and I covered the components, procedures, and expectations of the lab we will begin tomorrow.
Gravity Racers Lab.docx

The solutions to the Composition of Hydrates WS were demonstrated.
Students were asked to read the first two sections of Chapter 11 concerning stoichiometry.

We completed the following speed/graphing exercise:
Calculating Average Speed.xlsx

I had the students construct a foldable with the three kinds of speed: Average speed, Instantaneous speed, and Constant speed.

We then compared the slope of a line on a distance-time graph as a fast speed (large positive slope), a slow speed (small positive slope), or no speed (no slope - a straight line).

I asked the students to complete the questions (#1-6) on page 46 for a homework grade.

We practiced the skills in determining empirical and molecular formulas by completing these worksheets:
CHif55.bmp
CHif56.bmp

I then asked them to attempt the following worksheet based on their knowledge of masses and the section from chapter 10 of the book:
CHif57.bmp
chap10.pdf

We reviewed the Factor-Label method of unit conversions (also called "Dimensional Analysis") and performed many practice examples including a few from the Speed WS 2.

We determined empirical and molecular formulas. Hints were dropped that they should be able to do this with only a calculator and a periodic table.

Yesterday's Speed WS 1 was checked for correctness and the problems were worked on the board.
Students were presented with more speed formula exercises:
Speed Problems WS 2.pdf
WS Answer Form.xlsx

The steps for successfully converting from metric to imperial measures and vice versa were covered, as well.

The work from the day before was observ'ed for the attempt, and percent composition and empirical formula examples were presented.

Spring Semester Syllabi were distributed:P S Syllabus - Spring 2009.doc

The concepts of motion and frame of reference were introduced, as well as the speed formula.

Students were asked to complete the nine questions on Speed WS 1 (Speed WS 1.bmp), and put their answers on the Speed WS 1 Answer Sheet (Speed WS 1 Answer Form.xlsx ).
For blog hunters, here are the solutions: Speed WS 1 Solutions.xlsx

Syllabi for Spring 2009 were distributed.
Chemistry Syllabus Spring 2009.doc
Students were asked to read sections 10.4 and 10.5 in their book (chap10.pdf - 10 MB), covering Empirical Formulas, Molecular Formulas, and Hydrates.
Students were asked to attempt the following tasks to show their commitment to self-discovery of content through reading:
1) p. 344, # 55
2) p. 344 Reading Check at the bottom of the page
3) p. 346 #58
4) p. 350 #62
5) p. 352 Reading Check
6) p. 354 #76, 80