September 13, 2013
Happy Friday the 13th!!!!!
Today we went over the test answers and started our new unit: unit conversions, scientific notation, and significant figures. Students received a half sheet of practice problems for significant figures. due Monday, September 16.
We also played take-a-break Friday trivia. For you students who need to read to understand directions...please look below. For you students who need pictures to better understand....look at the top of this web page. Good luck!
We also played take-a-break Friday trivia. For you students who need to read to understand directions...please look below. For you students who need pictures to better understand....look at the top of this web page. Good luck!
chapter_2_note_outline.docx | |
File Size: | 259 kb |
File Type: | docx |
gchem_chap_2_notes_2013.notebook | |
File Size: | 3040 kb |
File Type: | notebook |
sig_fig_inclass_no_math_12.doc | |
File Size: | 29 kb |
File Type: | doc |
September 16, 2013
Today we are talking about WHY are significant figures important, giving examples on what they tell us as far as data. We will also be diving into accuracy and precision as well as relative error.
Make sure to uncover those portions of the notes as well as practice the Sig.Fig. Worksheet (we did this as a speed worksheet) but make sure you understand why the answers are what they are. We also received the absolute and relative error worksheet due Wednesday, September 18.
Make sure to uncover those portions of the notes as well as practice the Sig.Fig. Worksheet (we did this as a speed worksheet) but make sure you understand why the answers are what they are. We also received the absolute and relative error worksheet due Wednesday, September 18.
sig_fig_ws_12_no_math.doc | |
File Size: | 30 kb |
File Type: | doc |
error_ws_11.docx | |
File Size: | 14 kb |
File Type: | docx |
September 17, 2013
Today we reviewed parts of the percent error worksheet and the rest is due by tomorrow. We also started the accuracy measurement lab where students are learning to be more accurate and record observations in a proper manner.
For example, we talked about if you are taking down datum that includes 1 measurement of length...for example 30.0 cm. IF the equipment you are using only measures cm WITHOUT mm markings, your answer must contain two observational values that you know for sure and one ESTIMATED value. In this case, you tenth place (zero after decimal place) would be my estimated value because my ruler DOES NOT have millimeter markings on it. Note the picture below, we are talking about the top half of the ruler...NO MILLIMETER MARKS.
For example, we talked about if you are taking down datum that includes 1 measurement of length...for example 30.0 cm. IF the equipment you are using only measures cm WITHOUT mm markings, your answer must contain two observational values that you know for sure and one ESTIMATED value. In this case, you tenth place (zero after decimal place) would be my estimated value because my ruler DOES NOT have millimeter markings on it. Note the picture below, we are talking about the top half of the ruler...NO MILLIMETER MARKS.
Now, as for the bottom portion of the ruler...my measurements are in millimeters. However, if I asked you to measure the value in centimeters....if I had a dot by 20.21 mm....that in centimeters would have to be 2.021 cm (due to conversion of metric units to metric units). My 20.2 millimeters I can SEE o the ruler...but I MUST HAVE ONE ESTIMATED VALUE in my observation. If you are confused on this...please come see me for further help.
The lab packet that was given for this lab is due in class tomorrow where we will review it. The error worksheet can be found on the date above (yesterday).
The lab packet that was given for this lab is due in class tomorrow where we will review it. The error worksheet can be found on the date above (yesterday).
accuracy_lab.doc | |
File Size: | 40 kb |
File Type: | doc |
September 18, 2013
Due to classes being somewhat confused on a due date...the lab packet from yesterday is due COMPLETED by tomorrow. Also, the relative error worksheet will be graded on complete-ness. This will be checked first thing in the morning. Those gone will be exempt. Today we took the significant figures/calculations quiz. We then talked about the lab a bit. It was a catch up days to make sure both chemistry classes were on the same page for tomorrow to start unit conversions. Students NEED to keep up with unit conversions so they don't get behind. From here on out, we will be using unit conversions...A LOT (especially in stoichiometry and gas laws)!
September 19, 2013
Today we are talking about unit conversion and dimensional analysis. This is a very useful piece of information and we will be using it for the majority of the rest of the year. Make sure that you are quizzing yourself and keeping up with these practice problems, you will make your life that much easier. Today we went over what IS dimensional analysis and unit conversion with notes and we did practice problems on the white boards. We then received a unit conversion worksheet that will be due Monday, September 23.
gchem_chap_2_notes_2013.notebook | |
File Size: | 3040 kb |
File Type: | notebook |
use_of_unit_analysis.doc | |
File Size: | 29 kb |
File Type: | doc |
Tentative test date is Wednesday, September 25.
There will be a quiz on unit conversion Monday, September 23.
September 20, 2013
Happy Homecoming! Hope you all are planning a fun filled, community involved weekend!
Today we are covering more unit conversions using dimension analysis. Students are to complete their unit conversion worksheet for Monday, September 23. We are covering problems that are starting with derived units and units that are squared/cubed. If you have any questions, don't hesitate to ask. There will be a unit conversion quiz MONDAY as well.
September 23, 2013
We did not take the unit conversion quiz today due to students still having a harder time understanding unit conversions using dimensional analysis. Today students were able to ask me questions on the homework and have me work some problems on the board. We covered data analysis today. We talked about direct and inversely proportional relationships and how the data would look on the graph. We also talked about the formulas that give us out constants. Students should work on the half sheet tonight and we can talk about it more tomorrow. The Unit Conversion worksheet is DUE TOMORROW. The Unit Conversion Quiz is ALSO TOMORROW. So study hard! If needed, please come see me with questions before or after school.
ch_2_inverse_and_direct.doc | |
File Size: | 29 kb |
File Type: | doc |
September 24, 2013
Today we took a unit conversion quiz. Only first hour had their quiz today. Fifth hour received their quiz yesterday (9/24) due to a disruptive environment. Students who were not being disruptive received leniency. First hour's quizzes will hopefully be graded by tomorrow. We also went over the answers to the inverse and direct proportional relationships worksheet. The unit conversion sheet is due tomorrow, I let them keep it as a study guide. TEST IS TOMORROW SO STUDY HARD! ALL late work is due tomorrow or it is a ZERO unless you were absent or other accommodations were made.
September 25, 2013
TEST DAY! I also collected the Unit Conversions worksheet.