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# The Scientific Method PowerPoint PPT Presentation

The Scientific Method. Know these 6 steps!. Step 1: Identify the problem. A problem is just something that piques your interest Example: my i -pod quits working. In your journal, draw the box on the left!. PROBLEM :

The Scientific Method

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## The Scientific Method

Know these 6 steps!

### Step 1: Identify the problem

• A problem is just something that piques your interest

• Example: my i-pod quits working

• In your journal, draw the box on the left!

PROBLEM:

________________________________________________________________________________________________________

### Step 2: Research (make observations)

RESEARCH (OBSERVATIONS):

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• Quantitative (QN) observations: facts with numbers

• Qualitative (QL) observations: facts without numbers

• Inferences: logical guesses based on observations

• What do you already know about the problem? What do you need to find out?

• Example: I don’t hear any sound coming from my i-pod. The screen is not lighting up on my i-pod.

### Step 3: Make a hypothesis

• This is known as an “educated guess” because you have done research on your problem and so the answer has some facts behind it.

• Hypotheses can change over time as scientists do more research and discover new information.

• Example: My i-pod isn’t working because the battery needs to be charged.

HYPOTHESIS:

________________________________________________________________________________________________________________

### Step 4: Perform an experiment

EXPERIMENT:

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• An experiment is used to test the hypothesis that was formed in step 3. In a controlled experiment, only one variable is changed.

• Materials: what do you need to conduct the experiment

• Procedure: what are the steps you need to take to conduct the experiment

• Example: I am going to plug the charger into my i-pod, wait 30 minutes, and then see if it works.

### Step 5: Analyze the Data

DATA (analyze):

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• Data should be written in a table, with the independent variable in the left column and dependent variable(s) in the right hand column(s)

• If appropriate, data should then be shown in a chart or graph (line graph, pie chart, etc.)

• Example: