Catalyst – Last Day of January ‘12 PLEASE TAKE YOUR QUIZ 1.1 OUT IF YOU HAVE IT! GRAB A CALCULATOR! 1. What are the characteristics of a good procedure? 2. What is the difference between accuracy and precision? 3. Convert 15 hectograms to grams.

Today’s Agenda  Catalyst  More Dimensional Analysis  Review for the Unit Test Numero Uno and WORK TIME…GET IT IN!  Test Taker Song! GET IT KRUNK!  Exit Question and Progress Reports

Today’s Objectives  SWBAT master dimensional analysis.  SWBAT get ready to DOMINATE the Unit 1 Test!

Front DoorProjector 2 nd Period Group 3 Jasmine G., Blake, Ly’Janae, William Group 2 Jasmine B., Jonathan, Nila, Jevon Group 1 Kevin, Deanna, Marlonika, Tra Group 6 Luke, Veronica, Jorrance, Sherrell Group 4 Andrew, Russell, Arielle, Tirelle Group 9 Group 8 Chris, Irvondra, Bryana C. Group 7 Jenna, Lindsay, Destin Group 5 Jason, Banika, Antoine, Jenna B.

Front DoorProjector 3 rd Period Group 3 Paul, Nikki, Megan, Ryan Group 2 Raymond, Lashona, Jonathan, Jaymie Group 1 Destiny, Kevin, Terrell, Allie Group 6 Temika, Amber, Joey, Demirr Group 4 Raven, Mecalla, Daniel, Cory Group 9 Terrell, Briana M., Simona Group 8 Josh, Kayla, Layla Group 7 Jasmine, Nick, Ashleigh Group 5 Ronda, Lauren, Randy, Joie

Front DoorProjector 5 th Period Group 3 Torien, Nasheema, Jesus, Sharika Group 2 Champagne, Angel, Jornell, Ovile Group 1 Titus, Antoineka, Myderika, Boris Group 6 Roxy, Chalsey, Brannesha, Katherine Group 4 Keiara, Myjiel (lab table), Kevin, Blake Group 9 Aerial, Ashley, Antione Group 8 LaNell, Chyna, Corteiona Group 7 Alex, Molly, Alesia Group 5 Jerome, Larriane, Taylor, Myra

DON’T FORGET SNOOP’S MESSAGE!

Working on the Railroad  Step 1:  What to what?  Step 2:  Write conversion factor(s)  Step 3:  Train tracks

Length - Meters  Creepy Math Guy found a ruler! SWEEET!SWEEET!

Always remember…  2-Step Key Point: In two step problems, always convert to the unit without a prefix first.  Mass: grams  Distance: meters  Volume: liters

2-Step Practice…  Chris Paul has a mass of 79.4 kg, convert this to mg.  kg  g  mg  1 kg = 1000 g  1 g = 1000 mg

Practice  There are 1135 decaliters (daL) in a pool. Convert to centiliters (cL).  daL  L  cL  10 L = 1 daL  100 cL = 1 L

Practice!  The average human eye blink is 300 milliseconds. Convert this to hectoseconds.  ms  s  hs  1 s = 1 ms  1 hs = 100 s

1 or 2 Steps? How many deciliters are in a liter?

1 or 2 Steps? How many decigrams are in a kilogram?

1 or 2 Steps? How many micrometers are in a megameter?

1 or 2 Steps? How many milligrams are in a gram?

Graphing Review!  What question was the scientist most likely trying to answer with the graph?  What is a conclusion that can be made from the graph?  Describe a flaw in the graph and how you would fix it OR describe a follow-up experiment to learn more about the topic  Write a hypothesis to answer the following question…

Science Skillz  A good experimental question asks why or how something happens.  A good hypothesis is an educated, testable guess that answers a question.  Scientists perform experiments in order to test hypotheses.

Variables  Independent Variable: variable that you change during an experiment; causes the change you are measuring; aka manipulated variable (acts independently)  Dependent Variable: variable that is observed; changes in response to change in IV; aka responding variable (depends on other things)

Constants  Everything but the independent and dependent variable must be kept constant.  Constants: other experimental factors(or variables) that stay the same throughout experiment  If many different things change at once, we don’t know what causes the change!

How to plan a procedure…. Characteristics of a quality procedure… 1. Materials (including safety equipment) 2. Step-by-step instructions 3. Each step is numbered 4. Specific and clear

Lab Equipment and Safety Methods Think about what to do to prevent bad things from happening in the lab! Don’t forget what to do if something goes wrong in the lab! LAB EQUIPMENT!

Accuracy and Precision  Accuracy is how close you are to the correct or accepted value of a measurement.  Precision is how close a series of measurements are to one another.

Scientific Notation YOU WILL BE DOMINANT ON THE TEST!!!

Scientific Notation

Scientific Notation x x 10 -6

Scientific Notation 8.1 x x 10 -2

Scientific Notation 8.1 x x

Temperature Conversions  Celsius to Kelvin:  Add 273 to the ˚C  Kelvin to Celsius:  Subtract 273 from the K 1. 0 ˚C ˚F K  Celsius to Fahrenheit:  Multiply ˚C by 9  Divide answer by 5  Add 32 to answer  Fahrenheit to Celsius:  Subtract 32 from ˚F  Multiple answer by 5  Divide answer by 9

Exit Question 1. What are you going to do to make sure you DOMINATE the Unit 1 Test tomorrow??? HOMEWORK: Study for TEST tomorrow!

Catalyst – 2, 41 0, 2012 Please take out any study materials that you may have. You will get study time after the Catalyst. Please get a calculator as well. 1. What is a conversion factor? What does it look like? Give an example.

Today’s Agenda  Catalyst  Study Time  Unit 1 Test = DOMINATION  No Exit Question Today

Today’s Objectives  SWBAT DOMINATE THE UNIT 1 TEST!