i-n-d-e-p-e-n-d-e-n-t variables (and dependent and controls)
DESCRIPTION
I-N-D-E-P-E-N-D-E-N-T variables (and dependent and controls). Objectives: SWBAT identify independent and dependent variables in a controlled experiment. Catalyst: - PowerPoint PPT PresentationTRANSCRIPT
I-N-D-E-P-E-N-D-E-N-T variables (and dependent and controls)
Objectives: SWBAT identify independent and
dependent variables in a controlled experiment.
Catalyst: Write a hypothesis to the following
question. Then describe how you would answer it. Would a tomato plant grow larger in natural light or artificial light?
Agenda
Catalyst Review How to work in Mr. Jhaveri’s lab Make mystery goo! What is an independent and dependent
variable? FOLDABLE Exit Question
Catalyst Review
Hypotheses! Is it educated? Is it testable?
How would you test it? What are you changing? What are you keeping the same?
Mystery goo! (30 minutes)
Once you have your procedure ready to go: Gather the materials you need.
Send logistics person to go get it. With your group, ANTICIPATE what will happen
Clean up: Beakers must be washed thoroughly. Place them upside down on the paper towels. Wipe down your desks and floors.
Mystery Goo Hypotheses
Let’s talk about the goo some more.
What would have happened if we added more water? How would you test it?
What would have happened if we added more corn starch? How would you test it?
Experimentation
Key Point #1: A proper experiment always has an
independent variable, dependent variable, and control group.
Scientists will change one thing and measure something else.If Mr. Jhaveri wears his basketball shoes, then he will score more points in a game.
Variables
Independent Variable: The thing that I change Basketball Shoes
Dependent variable: The thing that is measured Points
*Remember variables are always nouns!!
Good experiments…
ONLY CHANGE 1 THING!! You must keep everything else constant,
or your data may not be valid! Control Group: The group without the
independent variable. What was the control group in the
basketball experiment?
IMPORTANT!!!
Practice
Do older microwaves give off more radiation? What is the independent variable?
IV =
DV =
Microwave Age
Radiation
Practice
Are there more love bugs in the summer or the winter months? What is the dependent variable?
IV =
DV =
Season
Amount of love bugs
Practice
Students of different ages were given the same puzzle to assemble. The puzzle assembly time was measured. What was the dependent variable in this experiment?
IV =
DV =
Age
Puzzle Assembly Time
If there are more students, then there will be more school
buses.
IV =
DV =
Amount of students
Number of school buses
If the cost of beignets increases, then fewer will be sold.
What depends on what?
IV =
DV =
Cost of Beignets
Amount of Beignets sold
IV = Number of free agents
DV = Games Won
If the Saints sign more free agents, then they will win more games.
Foldables!
First flap: Real-life scenario in hypothesis form
Second Flap: Define and identify independent variable
Third Flap: Define and identify dependent variable
Fourth Flap: Define and identify control group
Exit Question
Identify the independent variable, dependent variable, and control group in the following scenario.
Dr. Ayaad believes that eating artichokes can decrease cholesterol. Dr. Ayaad recruited two sets of patients of equal age and health and she gave one group a normal diet and another an artichoke-filled diet. She then measured the patient’s cholesterol 2 weeks later.
COMPUTER TIME
One computer per 2 students.
Respect these computers. Always tie up cords before walking. Do not use excessive force when opening up the
computer. Be Patient!!!
Respect the time. If I see you on another website without permission,
you lose your computer privileges for the day and you will have an alternative assignment.