# Scientific Method - PowerPoint PPT Presentation

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Scientific Method. Blueprint For Success. Define the Problem. Make sure you know what the problem is. State the problem as a clear question. Will the use of Exxon gasoline give my car better gas mileage?. Research the Problem. Find out all you can concerning your problem

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Scientific Method

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## Scientific Method

Blueprint

For

Success

### Define the Problem

• Make sure you know what the problem is.

• State the problem as a clear question.

• Will the use of Exxon gasoline give my car better gas mileage?

### Research the Problem

• Find out all you can concerning your problem

• Use the Library

• Magazines

• The internet

• Personal Interviews

### Form a Hypothesis in the form of an “If -Then” Statement

• The first part of the statement represents the problem, while the second part represents the proof you are looking for.

• Examples:

• If I spend my money on a new CD, then I will not have enough to go to the movies.

• If I use Exxon Gasoline, then my car will get better gas mileage.

### Develop a Controlled Experiment

• All experiments contain variables (things found in the experiment).

• The Experimental variable is the thing being tested

• The Control variables are the other things having an effect on the experimental variable

• These must be kept identical

## Let’s Look at an Example!

Gasoline’s Affect on Car Mileage.

### What are Some Possible Variables?

• Car type

• Gasoline type

• Driver

• Driving Conditions

• Amount of gasoline

• Tires

• Extra weight in car

### If we are testing gasoline, what variables must be kept identical?

• The cars must be of the same type.

• Each car must have the same amount of gasoline.

• The cars must be driven over the same course, at the same speed, and under the same weather conditions.

• The cars must contain the same type of tires.

• The only difference is the type of gasoline.

### Conduct the Experiment

• Conduct the experiment several times.

• This is important to rule out making mistakes by using too few trials.

• The more trials the more specific the data.

### Analysis of Data

• Examine the data and analyze it making a determination as to what it is saying.

• Check to see if your data is complete or if more tests need to be conducted.