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I-N-D-E-P-E-N-D-E-N-T variables (and dependent and controls)

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:

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I-N-D-E-P-E-N-D-E-N-T variables (and dependent and controls)

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  1. 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?

  2. Agenda • Catalyst Review • How to work in Mr. Jhaveri’s lab • Make mystery goo! • What is an independent and dependent variable? • FOLDABLE • Exit Question

  3. Catalyst Review • Hypotheses! • Is it educated? • Is it testable? • How would you test it? What are you changing? What are you keeping the same?

  4. 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.

  5. 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?

  6. 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.

  7. Variables • Independent Variable: The thing that I change • Basketball Shoes • Dependent variable: The thing that is measured • Points • *Remember variables are always nouns!!

  8. 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!!!

  9. Practice • Do older microwaves give off more radiation? What is the independent variable? IV = DV = Microwave Age Radiation

  10. 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

  11. 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

  12. If there are more students, then there will be more school buses. IV = DV = Amount of students Number of school buses

  13. If the cost of beignets increases, then fewer will be sold. What depends on what? IV = DV = Cost of Beignets Amount of Beignets sold

  14. If the Saints sign more free agents, then they will win more games. IV = Number of free agents DV = Games Won

  15. 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

  16. 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.

  17. 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.

  18. After you get your computer running… • Go to this website: • http://school.discoveryeducation.com/sciencefaircentral/ • On the brown tabs on the lower left, click virtual lab. Then, hit get started. • Click How Does Your Garden Grow Virtual Lab (Flash)

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