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Scientific Method Bellringer

Scientific Method Bellringer. What is mass? What is weight? What is the scientific method? After you define, list all the parts you remember below your answer. What is the scientific method?.

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Scientific Method Bellringer

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  1. Scientific Method Bellringer • What is mass? • What is weight? • What is the scientific method? • After you define, list all the parts you remember below your answer.

  2. What is the scientific method? • The scientific method is a systematic way to answer questions. It’s the process we go through as scientists to answer questions about the world around us! You go through the scientific method everyday without even thinking about it!

  3. The steps of the scientific method are… • Observe and State the Problem • Make a hypothesis • Test your hypothesis through an experiment. • Record and analyze data. • Draw conclusions and communicate results.

  4. Brain Pop: Scientific Method (During this video, we will fill in the scientific method graphic organizer)

  5. Today, we are going to talk about the main parts of a good experiment… Hint: It’s not blowing up our classroom!

  6. Think about this… • Let’s say that Brad has a pimple. He wonders what will get rid of it. He’s heard that putting toothpaste on the zit will get rid of it. He’s also heard that lemon juice will get rid of it. He decides to rub his face with lemon juice and toothpaste. The next morning his pimple is gone. But which thing cured him? The toothpaste or the lemon juice?

  7. The Answer? • How many of you think it was the toothpaste? Raise your hand. • How many of you think it was the lemon juice? Raise your hand. • The truth is…. • THERE IS NO WAY FOR YOU TO KNOW FOR SURE BECAUSE THIS IS A BAD EXPERIMENT!!!

  8. Every Good Experiment Has Three Things! • Independent variables • Controls • Dependent variable So What Are These?

  9. IDENTIFYING VARIABLES

  10. What is a variable? Variable: A factor that can change in an experiment.Every experiment has two – one is the cause, the other is the effect.

  11. Cause and Effect • Does crushing a sugar cube effect the rate at which the sugar dissolves in the water? What is the cause and what is the effect?

  12. Crushing the sugar cube is what we predict will be the cause. We change this one! This is called the Independent Variable. Crushing the sugar cube will effect how long it takes to dissolve. This is called the Dependent Variable. The time it takes to dissolve is what we will see the effect on. We measure this one!

  13. Variables: • Independent Variable is the cause, the one we will change. • Dependent Variable is the effect, the one we will measure.

  14. Experiment Title: Does the age of a person gets married effect their chances of getting a divorce?Experiment Title: Does fertilizer affect plant height?Experiment Title: Is there are relationship between the weather and how students behave? Age Chances of divorce IV- DV- IV- DV- fertilizer Plant height IV- DV- weather behavior

  15. Check for Understanding • Does brushing your hair make it grow faster? • Identify the independent variable. • Identify the dependent variable

  16. Check for Understanding • Do car accidents increase your car insurance cost? • Identify the independent variable. • Identify the dependent variable.

  17. CONSTANT Any variable we keep the same in order to make sure it isn’t what’s causing the effect.

  18. What were the constants in Tim and Moby’s experiment?

  19. Control Group • A control group is a group that is not treated. For example, if I gave some of you raffle tickets but not everyone…who is my control group? • What was the control group in Tim and Moby’s experiments?

  20. Practice with Controls • Does fertilizer affect plant height? • Independent Variable: fertilizer • Dependent Variable: plant height How can we be sure that the fertilizer is effecting the plant height? What would some constants be? We must have a control to make sure that the fertilizer is the only factor affecting plant height. • Control: Plant that does not receive fertilizer.

  21. Practice with Controls • Does the temperature outside effect the chances a person will get the flu? -IV: Temperature outside -DV: Chances a person will get the flu -Control: Person

  22. Check for Understanding • What effect does a car’s speed have on gas mileage? 1) Identify the control.

  23. Check for Understanding • Does adding salt to water affect the temperature at which it boils? • Identify the control.

  24. Simpsons Worksheet • 20 minutes • First two with me, • Last three with partner • Whisper!

  25. Instant Snow!  • We will work this out together to figure out which liquid makes the fluffiest snow!

  26. Spongebob Worksheet • Independent Practice

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