General Discussion
There is a general discussion forum for Mr. Young's students. You can use this forum to post questions for your fellow classmates and also look at historical discussion of similar topics.
Chemistry I Forum
Chemistry II HAIKU Page Discussion Forum
Instructional Materials
The learning resources for this unit are organized in one place on this page. Here you can find guidelines to make up missed work (or to work ahead), a description of upcoming assessments, powerpoints used in class, etc.
Quick Links
Unit 1 Resource Folder  Rubrics and Answers to Assignments
Mr. Young's Scientific Skill Toolbox
Chemistry II Haiku Page
Assessment Summary
Item 
How to be prepared and successful 
Quiz 1  Powers of 10

Complete packet worksheets, check your answers online, discuss issues with classmates
or your teacher. Review Learning Check 1 and Numeracy Assessment pretest.

Quiz 2  Significant Figures and Math Skills

Complete packet worksheets, check your answers online, discuss issues with classmates
or your teacher. Review Learning Check 2 and Numeracy Assessment pretest.

Lab  Density of Ethanol 

Quiz 3  Measurement, Accuracy and Precision 

Learning Tasks
Task 1  Numeracy Pretest
This is a 40 question multiple choice test designed to survey the class's understanding of numeracy and measurement concepts. This test DOES NOT count toward your grade but will be used by Mr. Young to inform teaching practice. A paper copy of the test will be given to you but we will use HAIKU to enter answers. Follow the link below to access the electronic version of the assessment.
Practice: U1  Numeracy Assessment (Pretest)
Task 2  Orders of Magnitude and Powers of 10
Task 1 looks at the topics of scientific notation and metric prefixes. As numbers in science can be both very small and very large, scientists need ways to represent these quantities efficiently. Scientific notation and the SI system of measurement both utilize powers of 10 to simplify working with large and small quantities.
 work through the numeracy packet sections covering these topics
 additional information, video tutorials and examples can be found on the following pages
Practice: U1  Learning Check 1  Powers of 10
Task 3  Significant Figures
No measurement in science is exact. When we make measurements, the last recorded digit is an estimate.
Since measurements are at best, very good estimates, we are limited when measurements are used in calculations. Final answers are rounded to show how estimates in measurement limit our confidence in the calculated value. This concept is described as significant figures (or digits).
The figure below shows how the measuring instrument you choose can affect the detail of a measurement and in turn the number of significant figures.
 work through the numeracy packet section on significant figures
 additional information, video tutorials and examples can be found on the following page
Practice: U1  Learning Check 2  Significant Figures
Task 4  Math Skills
Math skills  rearranging equations, correct substitution, performing the necessary unit conversions, being able to use your calculator, and checking your results  are crucial to success in any science subject.
Task 5  Measurement, Accuracy and Precision
How long is the pencil?
What is the temperature reading on the thermometer?
ABSOLUTE UNCERTAINTIES  KEY CONCEPTS
Takes into account both limitations of instrument scale, AND how it is being used.
An absolute uncertainty value has only ONE significant figure.
The place value of the uncertainty matches the place value of the estimated digit in the measurement.
PERCENTAGE or RELATIVE UNCERTAINTIES  KEY CONCEPTS
Expressed as a % of the measurement value and can be more than one significant figure.
Both of these graduated cylinders are being used to measure the same volume of liquid.
Record a measurement for each cylinder with absolute uncertainty.
Calculate the % uncertainty for each measurement.
Comment on
a) which is the better instrument to use and why
b) why percent uncertainty is a useful value
Sometimes it is not so obvious . . . compare these two measurements
945 ± 5 m and 8.7 ± 0.3 cm
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