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The scientific method is anorganized way of figuringsomething out.

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Mrs. Shelly made anobservation....

Laundry detergent pricescontinue to increase

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Testable Problem

Which brand of laundry detergent is best atgetting rid of stains?

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My Hypothesis:(educated guess, based onresearch or general knowledge)

IfI test the effectiveness of differentlaundry detergents on a soda stain thenthe generic brand will be as effective asthe name brand detergents at removing

the stain.

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My materials

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Must have a controlled investigation!

All of the variables (anything that can

change in an investigation) are kept thesame EXCEPT the type of detergent thatwe use.

The variable that we change is called theindependent variable

The variable that we are measuring, orrecording is the dependent variable

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What are the constants?(Everything that remained the samein the investigation)

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What is the Independentvariable?(The 1 thing that was changedon purpose)

Content/writing space

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What is the Dependent variable?(what we are recording in the data table)

Content/writing space

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Recording Results in the Data Table

Before:

Ultra Extra Ultra Tide Ultra Kirklands

After:

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Analyze Results

While it appears that alldetergents were equallyeffective....

I need to complete more trialsto make a fair conclusion.

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Important Info

Must be able to test the hypothesis Can only change 1 variable - the independentvariable

You measure the dependent variable (it's whatyou record in the data table)

You must control all of the variables (except for

one) in order to draw a logical conclusion Repeat many times, then analyze your resultsbefore drawing conclusions

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Sort the keywords.

Word Description

Description 1

Label

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Your turn!

Mrs. Shelly will demonstratea proper scientific

investigation. Use the iPadsto identify the variables.

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DATA TABLE: Time it took the paper to hit the ground

Flat Paper

(time in seconds)

Loosely Crumbled Paper

(time in seconds)

Tightly Crumbled Paper

(time in seconds)

Time inseconds

Flat Paper Loosely Crumbled Tightly Crumbled

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Identify the Variables!

Independent Variable:

Dependent Variable:

Controlled Variables(constants):

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