Warm Up Copy the questions and answer 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 you’re 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

Class Syllabus Please follow along: Advices Advices Grading scale Grading scale Quizzes and Tests Quizzes and Tests Classwork Classwork Homework – Online Course #D205 Homework – Online Course #D205 Late assignment policy Late assignment policy -Extra credit Academic dishonesty Academic dishonesty Rules & Consequences Rules & Consequences Class website Class website - Pet peeve

Safety rap Video LABORATORY SAFETY RULES Chemical Hazard Label Chemical Hazard Label SDS SDS Safety Quiz Safety Quiz THIS IS CHEMISTRY!

NFPA CHEMICAL HAZARD LABEL HEALTH SPECIAL REACTIVITY (STABILITY) FLAMMABILITY

NFPA CHEMICAL HAZARD LABEL 0 Least Serious 4 Most Serious 40 Flammable vapor which burns readily Substance is stable

Avoid water. NFPA CHEMICAL HAZARD LABEL May detonate with heat or ignition. Severe health risk. Burns readily. Diborane

NFPA CHEMICAL HAZARD LABEL Complete Label for Phosphine

Write down What each symbol stands for

C. Johannesson SDS = Safety Data Sheet

Notebook Format Date Warm up questions and answers Main Topics: 1 summary per day. 3 sentences summarizing main ideas from today’s notes and explain what they are - Main ideas - Questions related to the notes - Notes from lecture - Explanations - Diagrams - Pictures  You may write on the back  Start with a new page each day

Identify the problem Identify the problem Form a hypothesis Form a hypothesis Test hypothesis by performing experiments Test hypothesis by performing experiments Analyze data Analyze data Draw conclusions Draw conclusions Unit 1 Steps of the Scientific Method

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)

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

Homework Assignment Make a poster of lab glassware due on Monday, Aug 17 th Make a poster of lab glassware due on Monday, Aug 17 th Google lab glassware, select 6 objects, hand drawn, colored and label on print paper Google lab glassware, select 6 objects, hand drawn, colored and label on print paper Some example laboratory objects: 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

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

Table 1. Data Collection SubjectIndex finger length Hand span (pinky to thumb) Forearm (Wrist to elbow) Arm length (shoulder to fingers Arms span HeightFoot length Self Partner #1 name Partner #2 name Partner #3 name

Table 2. Data Analysis SubjectRatio 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

Conclusions (only answers) 1. What is the ratio of your height to your arms span? 2. Is your arm span the same as your height? How about your group members? 3. What is the ratio of your height to your forearm? 4. What is the ratio of your hand span to your index finger? 5. If the ratio is 2:1 what does it mean? 6. Compare yourself with your partners, does everyone have the same ratio? Who does and who doesn’t? 7. Does your data support your hypothesis?