Warm Up8-13-15

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Warm Up 8-13-15

• Direction Copy the questions and answer
• Based on the syllabus how many percent is
  classwork and homework worth?
• What format do you use to take notes in class?
• Can you turn in late work?
• If youre tardy, how many minutes do you have to
  stay after the bell?

Agenda Syllabus walkthrough Emergency contact
info Lab safety walkthrough Online homework
walkthrough Notes Scientific Method
Homework Aug 17 Glassware Poster due Aug 17
Signed syllabus due Aug 19 Safety Quiz
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Class Syllabus

• Please follow along
• Advices
• Grading scale
• Quizzes and Tests
• Classwork
• Homework Online Course D205
• Late assignment policy
• -Extra credit
• Academic dishonesty
• Rules Consequences
• Class website

- Pet peeve
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LABORATORY SAFETYRULES

• Chemical Hazard Label
• SDS
• Safety Quiz

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NFPA CHEMICAL HAZARD LABEL
FLAMMABILITY
HEALTH
REACTIVITY (STABILITY)
SPECIAL
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NFPA CHEMICAL HAZARD LABEL
Flammable vapor which burns readily
Substance is stable
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NFPA CHEMICAL HAZARD LABEL
Diborane
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NFPA CHEMICAL HAZARD LABEL
Complete Label for Phosphine
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Write down What each symbol stands for
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SDS Safety Data Sheet
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Notebook Format

• You may write
• on the back
• Start with a
• new page each
• day

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Unit 1Steps of the Scientific Method

• Identify the problem
• Form a hypothesis
• Test hypothesis by performing experiments
• Analyze data
• Draw conclusions

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The Experiment

• Independent variable the item being tested in
  the experiment (What YOU change/manipulate)
• Dependent variable the item being measured in an
  experiment (DEPENDS on the independent variable)
• Control group The part of the experiment that is
  left unchanged (not required in some experiments)

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After the experiment.

• Law generalizes a body of observations. Explain
  things, but they do not describe them. Always
  true.
• Law of Gravity
• Theory summarizes a group of hypotheses. It is
  valid as long as there is no evidence to dispute
  it (theories can be disproven)

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Homework Assignment

• Make a poster of lab glassware due on Monday, Aug
  17th
• Google lab glassware, select 6 objects, hand
  drawn, colored and label on print paper
• Some example laboratory objects
• -Test tube rack -Beakers
• -Test tube holder -Bunsen burner
• -Test tubes -Hot plate
• -Pipette -Well plate
• -Graduated cylinder -Thermometer
• -Erlenmeyer flask -Ring stand

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Online HW

• Everyone must sign up for an account
• Record your login name and password for the
  Utexas website then turn it in
• Sign in and request to be in my class Course
  D205
• 1st Extra credit assignment is up, due next
  Friday (8-21-15) before 9PM

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Table 1. Data Collection
Subject Index finger length Hand span (pinky to thumb) Forearm (Wrist to elbow) Arm length (shoulder to fingers Arms span Height Foot length
Self
Partner 1 name
Partner 2 name
Partner 3 name
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Table 2. Data Analysis
Subject Ratio height to forearm Ratio height to arms span Ratio hand span to index finger Ratio arm length to index finger Ratio arms span to forearm Ratio of your hypothesis
Self
Partner 1 name
Partner 2 name
Partner 3 name
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Conclusions (only answers)

• What is the ratio of your height to your arms
  span?
• Is your arm span the same as your height? How
  about your group members?
• What is the ratio of your height to your forearm?
• What is the ratio of your hand span to your index
  finger?
• If the ratio is 21 what does it mean?
• Compare yourself with your partners, does
  everyone have the same ratio? Who does and who
  doesnt?
• Does your data support your hypothesis?