Catalyst January 27-8, 2012Write a hypothesis to answer the following question: How does the amount of sunlight affect the number of oranges grown in the orchard?Identify the independent and dependent variables in the following scenario: Johnny thinks that he is a great poet, but he gets nervous when he shares his work with others. He believes that performing in a slam poetry event with the Spoken Word Club at Higgins will help him overcome his nerves.

Todays AgendaCatalystQuick Variables ReviewLab Safety and CartoonNotes: Writing Quality Procedures/MethodsExit QuestionHW: Write a procedure for something youlike to do or cook OR something you wouldlike to learn how to do

Todays ObjectivesSWBAT dominate variables and experimental design.SWBAT describe basic lab safety procedures.SWBAT plan a QUALITY step-by-step method for making Mystery Goo.

REVIEW OFVARIABLES!

ExperimentationReview: A proper experiment always has an independent variable and dependent variable. Variable: a quantity or condition that can have more than one value; variable means change!Variables are CATEGORIES!

VariablesIndependent 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)

ConstantsReview: Everything but the independent and dependent variable must be kept constant.Constants: other experimental factors (potential variables) that stay the same throughout experimentIf many different things change at once, we dont know what causes the change!

ExampleLets say we want to design an experiment to determine what causes the Hornets to win games.

Number of games that Hornets win

Try this one! Answer in notesTravie McCoy hypothesizes that if he write more songs about being rich, then he will sell more CDs because his listeners also want to be rich.What is the IV?What is the DV?What are the constants?

Remember, variables are CATEGORIES.

If Travie write more songs about being rich, then he will sell more CDs because his listeners also want to be rich.IVNumber of songs about being richHow often Travie sings about being richAmount of times Travie sings about moneyDVNumber of CDs Travie sellsHow many CDs Travie sellsConstantAmount of money CDs costNumber of tracks on each CDHow good each CD is

PracticeYou want to figure out which mosquito repellent is the best. On 3 separate days, you apply a different repellent and then go sit outside. You count the number of bites you get each day.IV =DV =Constants? Type of mosquito repellentNumber of bites

PracticeMaria wants to make the track team. She believes that if she attends pre-season practice every day, then she will be able to run fast enough to make the team.

IV = DV =Constants?Frequency that Maria attends practiceSpeed

PracticeStudents of different genders were given a Mickey Mouse puzzle to assemble. The time it took each group of students to assemble the puzzle was measured.

IV = DV =Constants?GenderTime to assemble puzzle

If the number of Higgins students increases, then more school bus drivers will be hired.IV = DV =Constants?Number of studentsNumber of school bus drivers hired

If the amount of sugar used on beignets decreases, then fewer beignets will be sold. What depends on what?IV =DV =Constants? Amount of sugar usedNumber of beignets sold

IV = Number of games won this seasonDV = Number of players attracted next seasonConstants? If the Saints win more games this season, then they will attract more big name players next season.

Yesterdays Exit QuestionLets say you want to figure out what drink will make you taller: milk, Gatorade, or water. You drink each for a month and record your height at the end of each month.What is the independent variable?What is the dependent variable?What are at least two factors that should be held constant?

HOMEWORK QUESTIONS?

Scenario 1A researcher is studying the effect of sleep on aggression, thinking that less sleep will lead to more aggression. She has some people sleep 6 hours per night, some people sleep 3 hours per night and some people sleep as much as they want. She then monitors aggressive behavior during basketball games among participants. IV?DV?Constants?

Scenario 2A researcher is curious to find out what effect classical music has on peoples level of relaxation (as measured by heart rate). He suspects that listening to classical music will make people feel more calm and relaxed. He lets one group listen to classical music for one hour. He lets another group sit in a quiet room for one hour (i.e they hear no music). After one hour, he monitors the heart rate of each participant to measure their level of relaxation. IV?DV?Constants?

Scenario 3A researcher conducts an experiment to assess the effects of alcohol on people's sense of balance. He divides his subjects into three groups: in one group the participants drink one ounce of alcohol, in another they drink two ounces of alcohol and in a third group the participants drink soda. He then watches as each participant tries to walk on a straight line from one corner of the room to the next and notes how many times they stumble outside the line. IV?DV?Constants?

Unit 0 Domination StatsClass Averages

2nd Period: 83.2%3rd Period: 89.9%5th Period: 91.5%

Unit 0 Domination StatsAs and Bs, 2nd PeriodKenneth Anderson (100!)Casey BavaretDabnis BellGerald BrentNyiah DanielRashad DuplessisSharrita HenryPerla HernandezHolly Jackson (100!)Rudy JohnsonKev-lonn Joseph

Marlon Kelly (100!)Trong LeAmber LeeChristian LukeCarisa PrejeantLorieal SandolphCharles SmithJeronka StarksTiffany TaborLarue Warren (100!)

Unit 0 Domination StatsAs and Bs, 3rd PeriodAnthony AlexisJada Andrews (100!)Polo BarnesTierney BazileRylin CampbellKearston CollinsAngel CouchDaniel Delaney (100!)Taylor EdwardsJessica FalconTodd FieldsKevin FranceMegan Frederick (100!)Eric Gordon

Mone HillKaryan HollinghsedGreg Johnson, Jr.Vy NguyenKierra OverstreetDonshae PayneBrandon RobersonAngelica RomeBraylon SeltzerDevin WalkerJamel WilliamsRhyidh WilsonMikisha Wright

Unit 0 Domination StatsAs and Bs, 5th PeriodCourtney AlexanderJon Ancar (100!)Elisia BartheMax BooneJae BushSheena CarterMaryury CastanedaRaquel CastanedaTuyet Dam (100!)Danielle Holly

Dominqiue SotresLadajah SteeleKristen SturgeonJames Theriot (100!)Que Tieu (100!)Jenny TranJulie Trang (100!)Erin TriggsAnthony Vo (100!)Delana WilliamsKim Kha (100!)Janae JacksonAngelica JenkinsCorey JonesYKeshia JonesKrissy LegginsKristie OxfordMalik PorcheHiep Quach (100!)Gabby Richard

Unit 0 Champs1st Place (100): Kenneth Anderson, Jon Ancar, Jada Andrews, Tuyet Dam, Daniel Delaney, Megan Frederick, Holly Jackson, Marlon Kelly, Kim Kha, Hiep Quach, James Theriot, Que Tieu, Julie Trang, Anthony Vo, Larue Warren2nd Place (99): Krissy Leggins3rd Place (98): Rylin Campbell

LAB SAFETY ISESSENTIAL!!!!!

Safety EquipmentGogglesApronGlovesFume hoodFire extinguisherEye washSafety shower

Safety EquipmentGoggles

Safety EquipmentApron

Safety EquipmentGloves

Safety EquipmentFire extinguisher

Safety EquipmentSafety blanket

Safety EquipmentEye wash

Safety EquipmentSafety shower

What could happen if wedont follow safetyguidelines?

Wear your safety goggles!

Chemical burn.

Frayed cord?Unattended fire?

Safety Contract

Lab Safety Cartoon.and a Surprise!

Lab Safety Work TimeRead the Safety Contract thoroughlyPut one copy of the Safety Contract into the Culture and Goals section of your binderTake the other copy of the Safety Contract home; a parent must read and sign it along with you

NEW NOTES:PROCEDURES

Importance of a Good ProcedureWe must read and follow directions all the timeJUST THINK ABOUT DRIVING!

Importance of a Good ProcedureKey Point #1: Anyone can understand and duplicate a good procedure.Understand: The procedure is easy to read and has simple language Duplicate: The procedure can be repeated

When Things Go Wrong

When Things Go WrongKey Point #2: You must ALWAYS have a plan while performing an experiment.This prevents problemsIt is important to always read ALL directions and think before beginning an experiment ANTICIPATION

How to plan a procedure.Key Point #3: Characteristics of a quality procedureMaterials (including safety equipment)Step-by-step instructionsEach step is numberedSpecific and clear

Is this a quality procedure?

Is this a quality procedure?Materials:-Beaker-Water-Tongs-Red dye-Syringe-Stirrer

Procedure:Place the beaker on the lab bench. Pour 25 mL of water into the beaker. Add 5 drops of red dye to the water and stir with the stirrer. Heat the beaker up using a hot plate.

Is this a quality procedure?Materials:-Funnel-Filter Paper-Glass rod-Erlenmeyer flask-Water/sand mixture Procedure:Place the filter paper in the funnel.Place the funnel in the Erlenmeyer flask.Use the glass rod to help pour the water/sand mixture into the funnel. Collect the filtrate in the Erlenmeyer flask.Clean up.

Exit QuestionSelect the materials and plan the procedure to: (CHOOSE ONE) make Kool-AidORmake a sno-ball

Catalyst January (6+1)2+6, 2012FUN GRAPH FRIDAY! HW OUT!Which slime increased in price the most?Describe how the price of Online Vendor slime has changed over time.

Todays AgendaCatalystQuiz Stats and ReturnLab Report How-ToPlan Mystery Goo LabExecute Mystery Goo Lab and Clean-UpExit Question

Todays ObjectivesSWBAT write a lab report.SWBAT plan and execute an experiment to test the following question: How does the amount of corn starch added to 30 mL of water AFFECT the thickness of the mystery goo?How does the type of corn starch added to 30 mL of water AFFECT the thickness of the mystery goo?

Unit 0 Domination StatsClass Grade Averages2nd Period: 85.5%3rd Period: 86.2%5th Period: 82.7%

Unit 0 Domination StatsAs and Bs, 2nd PeriodJasmine B.LukeNilaJenna B.AntoineJayson (100!)BanikaMarlonikaTra

BrionneJasmine G. (100!)ChrisDeannaJorranceJevonJonathanWilliamKevin (100!)Tirelle

Unit 0 Domination StatsAs and Bs, 3rd PeriodKevinMecallaRyanPaulRyanLaylaDemirrCoryRaymondJoshJoieJaymie (100!)KaylaAmberDestinyAllieLauren (100!)NickRavenTerrellSimona

Unit 0 Domination StatsAs and Bs, 5th PeriodKeiaraJeromeKatherineTaylorAshleyKevinAerialMollyJornell

TitusAntioneAngelTorienAntoinekaMyjielLaNellChampagne

Unit 0 Champs1st Place (100): Jayson Camus, Jasmine Gusman, Kevin Thomas, Jaymie Mayberry, Lauren Smith2nd Place (99): Josh Hayes3rd Place (98): Deanna McCann

Lab Report Goes through the Scientific Method (label each section)QuestionResearch/Background InformationHypothesisExperimental Design (IV, DV, Constants)ProcedureData ConclusionFuture Experiments/Citations

QuestionHow does the amount of corn starch added to 30 of mL water affect the thickness of the mystery goo?ORHow does the type of corn starch added to 30 mL of water affect the thickness of the mystery goo?

Background InformationCornstarch is a fine, powdery starch that is made out of corn. It is produced by grinding, washing and drying the endosperm of the corn. Cornstarch has many culinary uses, but it is most often used as a thickener for sauces, gravies and fruit pie fillings. It has roughly twice the thickening power of flour.16 ounce prices: Argo $1.28; Great Value $1.00Mystery Goo acts like a solid and a liquid Mystery Goo Recipe:30 mL water + 4 teaspoons cornstarch

HypothesisYou com up with a QUALITY hypothesis!Make sure you have a reason (hint: use background info!)

Experimental DesignIndependent Variable (IV): ?Dependent Variable (DV): ? Constants (at least 3): ???

ProcedureMaterialsList everything, including safety equipmentStepsNumber them

Available MaterialsCorn starchUp to 10 spoonfuls totalWaterGraduated cylinderUp to 3 plastic cups1 bowl1 Plastic SpoonTo be reusedPlease dont throw away!

Mystery GooMs. Stroh stayed after school last night and mixedcorn starch and water together. Afterwards, she noticed that the goo had some strange properties. Sometimes it acted like a liquid, and sometimes it acted like a solid. She wanted to find out how to make the best goo possible for her students, so she planned an experiment. Then, Mr. Lewis told Ms. Stroh he heard a rumor that you all wanted to do labs. Mr. Lewis convinced Ms. Stroh to let you do the experiment too!

Mystery GooWrite this question on your paper: How does the amount of corn starch added to 30 mL of water affect the consistency of the mystery goo?Write a hypothesis to answer this questionExample: If ___________ cornstarch is added, then the consistency of the goo will be ______________ because __________________________________.Write your procedure/method for making Mystery Goo, including a Materials and a Procedure section. Dont forget Safety Methods!!!

Exit QuestionWrite the steps of the scientific method in order.

***Bring em in. We discussed making observations, questions (kinda), making hypotheses, lets discuss how we test our guesses to questions. *Ask your students, what was the thing I changed? What did I measure?*Ask students to identify IV, DV*On this slide, we are making a cause-effect diagram.

Write out everything that could possibly affect whether GSP wins. Choose ONE to be the IV---everything else must be held constant! Or else you do not know what is causing the change. Note that frequency that GSP wins is a good DV because it is a category.*Sometimes you will have to figure out variables after reading someones hypothesis.*Sometimes you will have to figure out variables after reading someones hypothesis.*******