Welcome to Chemistry I – Day III
Portland Evening Scholars
Mr. Treothe Bullock - Instructor
 Debrief Candle Lab
 Turn in...
Mass Balance Lab Discussion
 What was the largest difference between added
individual masses and the mass of both items
t...
Homework
 Complete Chapter 2 Review
 Study for Chapter 1 & 2 Test
 Have Lab Safety agreement turned in
 give reports
Element Notes
 Set up section in your binder to take notes
during Element reports. Take notes on the
following.
 Name & ...
Chapter 2 Review
 SI Base Units
 Density Calculations
Density = mass/volume
 Conversion factors
 Percent Error
percent...
Homework for Week IV
 Complete Chapter 2 Review sections 1 & 2
 Complete Metric Conversions
 Complete Accuracy and Prec...
Scientific Inquiry
 Hypothesis /
Background
 State the proposed
phenomena or results
expected in the research
 State ba...
Scientific Inquiry
 Data Collection and
Interpretation
 Data is relevant to Design – in
quantity and quality
 Data tabl...
Scientific Inquiry
 Sharing investigative work
 Peer Review – have your work reviewed –
edited by another student.
If yo...
The Law of Conservation of Mass
 Matter cannot be created or destroyed in
chemical or physical changes.
 Matter is conse...
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Chem I Week III

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Chem I Week III

  1. 1. Welcome to Chemistry I – Day III Portland Evening Scholars Mr. Treothe Bullock - Instructor  Debrief Candle Lab  Turn in completed labs next week  Chapter 1 Review  This is your personal pre test  We will go over  Element Reports –notes  Volunteers for sharing with class  Pair shares?  Write up in lab next week  Unit 2 – Overview & PreAssessment  Accuracy vs. Precision Lab  SI metric conversions Practice & Lab  Science Math Marathon  Exponents  Scientific Notation  Significant Figures  Dimensional Analysis  Unit 1 Exam will be next week  All Unit 1 Work should be completed & turned in with your exam
  2. 2. Mass Balance Lab Discussion  What was the largest difference between added individual masses and the mass of both items together?  How many times was there a difference?  What explanation do you have for the difference?  What could reduce differences?  How accurate is the scale?  With what precision does the scale measure?
  3. 3. Homework  Complete Chapter 2 Review  Study for Chapter 1 & 2 Test  Have Lab Safety agreement turned in  give reports
  4. 4. Element Notes  Set up section in your binder to take notes during Element reports. Take notes on the following.  Name & Symbol  Elemental Family  When, where and by whom was it discovered.  Where is it most commonly found.  How it is used.
  5. 5. Chapter 2 Review  SI Base Units  Density Calculations Density = mass/volume  Conversion factors  Percent Error percent error = Value(accepted) – Value (experimental)/Value (accepted) x 100  Significant figures  Scientific Notation  Direct proportions  Inverse proportions
  6. 6. Homework for Week IV  Complete Chapter 2 Review sections 1 & 2  Complete Metric Conversions  Complete Accuracy and Precision Lab Write Up  Prepare for Unit 1 Exam
  7. 7. Scientific Inquiry  Hypothesis / Background  State the proposed phenomena or results expected in the research  State background information that supports thesis or is needed to justify proposed investigation.  Connect background info with thesis – explain why it connects.  Investigation Design  Step by step procedure for research  Include detailed materials list  Include drawings of unique procedures or equipment.  Address any safety issues/risks associated with the design
  8. 8. Scientific Inquiry  Data Collection and Interpretation  Data is relevant to Design – in quantity and quality  Data tables and graphs clearly labeled  Observations are made and noted.  Data graphed to make interpretation of Data quick and easy  Conclusion / Analysis  Hypothesis restated  Results stated quantitatively and qualitatively to evaluate hypothesis and or research design  Background information and observations/data used to explain results  Modifications or next steps in research proposed based on evaluation of research.
  9. 9. Scientific Inquiry  Sharing investigative work  Peer Review – have your work reviewed – edited by another student. If your research is original the next step is:  Public Peer Review in Scientific Journals.
  10. 10. The Law of Conservation of Mass  Matter cannot be created or destroyed in chemical or physical changes.  Matter is conserved.

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