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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
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?
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 & Symbol
 Elemental Family
 When, where and by whom was it
discovered.
 Where is it most commonly found.
 How it is used.
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
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
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
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.
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.
The Law of Conservation of Mass
 Matter cannot be created or destroyed in
chemical or physical changes.
 Matter is conserved.

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Chem I Week III

  • 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. 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. Homework  Complete Chapter 2 Review  Study for Chapter 1 & 2 Test  Have Lab Safety agreement turned in  give reports
  • 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. 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. 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. 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. 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. 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. The Law of Conservation of Mass  Matter cannot be created or destroyed in chemical or physical changes.  Matter is conserved.