1. Scientific Method
Science
Ms. Kellachow

2. 1. State problem
State the problem
as a question.

3. Read, get advice, and make observations.
2. Gather Information
Read, get advice, and
make observations.

4. Make a prediction about
3. Develop a hypothesis
Make a prediction about
what will happen

5. Plan how you will test your hypothesis
4. Perform an experiment
Plan how you will test your hypothesis

6. 5. Collect and Analyze Data
Create a chart or graph
of your data

7. summarize your findings
6. Draw conclusions
Analyze your data and
summarize your findings

8. Conduct the experiment again and record and compare the data
Test your hypothesis
You may need to
Conduct the experiment again and record and compare the data

9. Independent Variable
An independent variable is the variable you have control over, what you can choose and manipulate.
It is usually what you think will affect the dependent variable.
Example: You are interested in how stress affects heart rate in humans. Your independent variable would be the stress level. You can directly manipulate stress levels in your human subjects and measure how those stress levels change heart rate.

10. Dependent Variable
A dependent variable is what you measure in the experiment and what is affected during the experiment. The dependent variable responds to the independent variable.
It is called dependent because it "depends" on the independent variable. In a scientific experiment, you cannot have a dependent variable without an independent variable.
You are interested in how stress affects heart rate in humans. Your dependent variable would be the heart rate. You can directly manipulate stress levels in your human subjects and measure how those stress levels change heart rate.