Monthly Archives: September 2019

SI Units and Unit Conversions

Chemistry 11H
  1.  Hand in Al Foil Lab.
  2. I will be able to identify SI Unit and do metric conversions using dimensional analysis (conversion factor method)
  3. Read section 1.6 and do #43 and 45 (show your work!)
  4. Test on sections 1.5 and 1.6 (Sig Figs and Unit Conversions) – Tues. Oct. 8

Video from “Rent” about Units/Conversions called “Seasons of Love”

Thermal Expansion and Contraction

Science 8
  1.  Go over Science Celebration handout –do you have any questions about the project?
  2. Hand out Journals to students to use (If you didn’t get one, come see me for one)
  3. Demo:  Ball in ring.  At room temperature, the ball fits through the ring.  When we heat up the ball, it no longer fits through the ring.  Why?  How does this relate to the Kinetic Molecular Theory?
  4. Do:  Worksheet for section 7.1 (pages 100-101).  See copy here:  Sec.7.1 Workbook

Lab: Find the Thickness of a Sheet of Al Foil

Chemistry 11H
  1.  Quiz on sig figs.
  2. Do/Finish lab: find the thickness of a sheet of regular and heavy duty aluminum foil.
  3. Prepare a lab report.  See format/instructions here:  how to write a lab report b.  Complete the lab report for next class (for the Q’s and Calculations, you should show how you calculated the thickness of each sheet of aluminum foil.  No Follow Up Questions.  Discussion – see guiding questions to help you.  Possible Sources of Error – give at least one!  Conclusion – should address the objectives of your lab)
  4. If you have questions, come see me!

Designing Experiments

Science 8
  1.  Review of the Smarter Science handout and how to design a controlled science experiment.
  2. Do:  Testing the Durability of Toilet Paper Lab Activity.  Remember that for it to be a controlled experiment, you can only change one variable at a time.  All other variables must remain identical for each test trial you do.  Gather your data and you will share your results with the class next day.
  3. For homework:  Read at least pages 1, 2, and 5 of the Science Celebration handout for next class.  If you have time, read the whole handout!  See copy here:  Science Fair Outline for 2019-20 ver1

Mg in HCl

Chemistry 12
  1.  Did you hand in your lab safety worksheet?  (if not, you will not be allowed to participate in the lab activities)
  2. Warm Up!  Question #1 on the worksheet.  See copy here:  rates
  3. Do:  Mg in HCl activity.  What factor did your group decide to change last class?  You will test how changing that factor affects the reaction rate.  You will share your group results with the class next day.

Designing Science Experiments

Science 8
  1.  Go over lab safety test (block 3 and 4).
  2.  I will be able to explain what happens when energy (heat) is added to matter.
  3. Demo:  Put hot water in Erlenmeyer flask with balloon over the opening of the flask.  When the flask is put into an ice bath, the balloon gets sucked into the flask.  Why?
  4. I will be able to design a controlled experiment.  See Smarter Science handouts here:  Smarter Science Steps to Inquiry 1
  5. Demo:  durability of toilet paper.  We made observations, wrote questions we had about the demonstration, brainstormed what we could have measured and what we could have changed.
  6. In groups of 3, students chose one thing that could be changed (i.e. the type of toilet paper, the number of drops of water added to the toilet paper, etc….) and we will measure how many pennies the paper can hold before it breaks.
  7. Fill out page 3-4 in the Smarter Science booklet for the experiment your group has chosen to do.
  8. Next class, you will be testing it out!

Lab: Find the Thickness of a Sheet of Aluminum Foil

Chemistry 11H
  1.  Fizz Quiz on Sig Figs
  2. Finish Density Lab class results and discussion.  Did you measure precisely?  Did you round your calculations to the correct number of sig figs?
  3. Lab:  Find the Thickness of a Sheet of Aluminum Foil.  See instructions here:  What is the Thickness of a Sheet of Aluminum Foil
  4. Next class:  I will show you how to write up your lab reports and you will have time to finish collecting data.
  5. Next class:  Quiz on Sig Figs
  6. In the meantime, continue reading chapter 1 and taking study notes.

Unit Conversions

Chemistry 11H
  1.  Lab Safety Test
  2. Go over sig figs worksheet – any Q’s?  See answer key here:  Sig Figs Worksheet with Answers
  3. I will be able to measure and calculate the density of water (applying what I have learned about precision and sig figs).  We will share results of the class next period. (Block 7 will do this next class–in the meantime, start memorizing the metric prefixes!)
  4. Begin reading chapter 1 and taking notes.  These will be study notes for yourself, and useful next year when you want to review for the AP Exam and can study from your notes rather than re-reading the textbook!