catalyst – january 3(6), 2012 way back wednesday!!!
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Catalyst – January 3(6), 2012 WAY BACK WEDNESDAY!!!. Which is more specific: a genus or a species? Fill in the blanks using the following words: GENES, ENERGY, EVOLUTION, CELLS. You can just write the correct word. ____________ are the basic unit of life - PowerPoint PPT PresentationTRANSCRIPT
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Catalyst – January 3(6), 2012WAY BACK WEDNESDAY!!!
1. Which is more specific: a genus or a species?
2. Fill in the blanks using the following words: GENES, ENERGY, EVOLUTION, CELLS. You can just write the correct word.
A. ____________ are the basic unit of life B. New species and inherited traits are the
product of __________________C. __________________ are the basic unit of
heredity D. Living organisms consume and transform
_____________________
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Catalyst – January 3(6), 2012WAY BACK WEDNESDAY!!!
1. Which is more specific: a genus or a species?
2. Fill in the blanks using the following words: GENES, ENERGY, EVOLUTION, CELLS. You can just write the correct word.
A. __________________ are the basic unit of life B. New species and inherited traits are the
product of __________________C. __________________ are the basic unit of
heredity D. Living organisms consume and transform
_____________________
CELLS
EVOLUTIONGENES
ENERGY
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Today’s Agenda Catalyst Review Scientific Method Variables Notes and Practice Time
I-N-D-E-P-E-N-D-E-N-T! DEPENDENT CONSTANTS
Exit QuestionHW: IV, DV, Constants Worksheet
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Today’s AgendaMs. Stroh is leaving early!
Catalyst Review Scientific Method Variables Notes
I-N-D-E-P-E-N-D-E-N-T! DEPENDENT CONSTANTS
SUB WORK (2nd Half of Class) Complete both worksheets; leave in
folder
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Front DoorProjector5th Period
Group 3Amber, Blake, Brannesha, Myra
Group 2Sharika, Roxy, Aerial, Angel
Group 1Chalsey, Titus, Antoineka
Group 6Ovile, Kevin, Molly, Champagne
Group 4Keiara, Boris, Nasheema, Myjiel (lab table)
Group 9Larriane, Myderika, Jerome
Group 8Jesus, LaNell, Taylor, Erica
Group 7Katherine, Antione, Jornell
Group 5Alesia, Ashley, Torien, Chyna
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FYI (For Your Information)Quiz 1.1 has been pushed back to Tuesday, 1/24
Unit 1 Test has been pushed back to Tuesday, 1/31
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Summary of Yesterday An experimental question must be
specific and testable A hypothesis must be a statement that
answers the question and gives a supporting reason
An experiment is the method to test the hypothesis and see if it was correct or incorrect
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Yesterday’s Exit QuestionYou observe that students in Ms.
Stroh’s class gethigher grades on their tests than the
students inMs. Blair’s class.
1. Write a question about this situation?
2. Write a testable hypothesis to answer your question.
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Piggies!1. Specific problem?2. Info needed?3. Hypothesis?
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Last Night’s Homework1. Overall purpose of the article?2. Hypothesis to explain why
squirrels hibernate3. Hypothesis to explain why
squirrels callNew Info: check out the
handout
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Today’s Objectives
SWBAT identify and distinguish between independent variables, dependent variables, and constants in a scientific experiment.
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NOTES: VARIABLES
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ExperimentationKey Point #1: A proper experiment always has an independent variable and dependent variable. The purpose of an experiment is to test how
changing ONE THING affects something else Variable: a quantity or condition that can have more than one value; variable means change!
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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)
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Variables Continued Remember!!!!
Variables are always CATEGORIES of things: time, amount, frequency, size, type
Variables are NEVER specific things
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Demohttp://www.unitedstreaming.com/videos/dsc/externalApplications/virtual_labs-es/Plants/index.html
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Teacher Models Scientists have discovered something
shocking: if you eat a lot of hamburgers, then you will gain fat. What is the independent variable?A. Eat a lot of hamburgersB. Type of hamburger you eat (McDonald’s,
Wendy’s, Burger King, etc.)C. Amount of hamburgers you eatD. How much weight you gain
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Teacher Models Well-rested students learn more in
school. So, Ms. Stroh believes that starting school later would increase test scores. What is the dependent variable?A. Starting school laterB. Well-rested studentsC. Time that school startsD. Test scores
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NEW PROCEDURE!
WHITEBOARDS!
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Whiteboard Practice When Ms. Stroh says “GO!”
Send one member of your group to get whiteboards, erasers, and markers for everyone (back lab bench)
Hurry! Remember, we want to stay under 3 minutes of transition time!
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Whiteboards 1Ms. Stroh believes that the more you study, the better grades you’ll earn. What is the independent variable?A. Studying moreB. Amount of time you studyC. Grade earnedD. Type of test
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Whiteboards 2 Shanel is always cold in class. She
hypothesizes that if she wears many layers of clothing to school, then she will be warmer. What is the dependent variable?A. Number of layers Shanel wearsB. How warm Shanel isC. Temperature of the roomD. Shanel will be warmer
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Whiteboards 3 Ms. Stroh’s students want to test how
easily bought off she is. Students who give her an apple get a “C.” Students who give her candy get an “A.” What is the independent variable?A. Type of food given to Ms. StrohB. Apples and candyC. “A” on the report cardD. Report card
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Whiteboards 4 Tashica hates cooking, but loves
listening to music. She believes that if she listens to music while cooking, then she will cook more often. What is the dependent variable?A. She will cook more oftenB. Listens to music while cookingC. Frequency that Tashica cooksD. What Tashica listens to
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If you’re having trouble…
4 minutes 26 mg of baking
soda Lifting weights
every day Medium t-shirts Bullfrog 16 candles Never gets sick
Time to get dressed Amount of baking
soda Frequency of lifting
weights Size of t-shirts Type of frog Number of candles Degree of health
WRONG RIGHT
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ReviewMs. Stroh believes that the more you study, the better grades you’ll earn. What is the independent variable?A. Studying moreB. Amount of time you studyC. Grade earnedD. Type of test
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Review Shanel is always cold in class. She
hypothesizes that if she wears many layers of clothing to school, then she will be warmer. What is the dependent variable?A. Number of layers Shanel wearsB. How warm Shanel isC. Temperature of the roomD. Shanel will be warmer
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Review Ms. Stroh’s students want to test how
easily bought off she is. Students who give her an apple get a “C.” Students who give her candy get an “A.” What is the independent variable?A. Type of food given to Ms. StrohB. Apples and candyC. “A” on the report cardD. Report card
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Review Tashica hates cooking, but loves
listening to music. She believes that if she listens to music while cooking, then she will cook more often. What is the dependent variable?A. She will cook more oftenB. Listens to music while cookingC. Frequency that Tashica cooksD. What Tashica listens to
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Guided Practice Worksheet10 minutes to complete3 minutes to compare answers
KEEP THIS to help you with homework tonight
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Constants Key Point #2: Everything but the
independent and dependent variable must be kept constant. Constants: other experimental factors (potential variables) that stay the same throughout experiment
If many different things change at once, we don’t know what causes the change!
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Example Let’s say we want to design an
experiment to determine what causes the Hornets to win games.
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Number of games that
Hornets win
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Try this one! Answer in notes… Travie 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.
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If Travie write more songs about being rich, then he will sell more CDs because his listeners also want to be rich.
IV Number of songs about being rich How often Travie sings about being rich Amount of times Travie sings about money
DV Number of CDs Travie sells How many CDs Travie sells
Constant Amount of money CDs cost Number of tracks on each CD How good each CD is
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PracticeYou want to know when in the year there
are the most love bugs. Every night, you record how many love bugs you find outside.
IV =
DV =
Constant =
Time of year (season/month)
Amount of fireflies
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Practice Maria needs to run a 6 minute mile to
pass PE. She believes that if she runs every day, then she will be able to run faster.
IV =
DV =
Constant =
Frequency that Maria runsMile time
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Practice Students of different genders were given
the same puzzle to assemble. The puzzle assembly time was measured.
IV =
DV =
Constant =
Type of gender
Time to assemble puzzle
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If there are more students, then there
will be more school bus drivers.
IV =
DV =
Constant =
Amount of students
Number of school bus drivers
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If the amount of sugar used on beignets decreases, then less beignets will be sold.
What depends on what?
IV =
DV =
Constant =
Amount of sugar usedNumber of beignets sold
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IV = Number of games won
DV = Number of players attracted
Constant =
If the Saints win more games, then they will attract more big name players.
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Conclusion A proper experiment always has an independent variable and dependent variable. Everything but the independent and dependent variable must be kept constant. Independent Variable: manipulated variable Dependent variable: responding variable Constants: factors kept the same throughout
experiment
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Exit Question Let’s 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.
1. What is the independent variable?2. What is the dependent variable?3. What are at least two factors that should
be held constant?HW: IV, DV, Constants Worksheet