# Scientific Method The way scientists investigate the natural world and propose explanations based on the evidence they gathered.

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Scientific Method The way scientists investigate the natural world and propose explanations based on the evidence they gathered.

State the Problem Usually begins by asking a question about an observation. The reason for doing the investigation. Ex- Do crickets chirp more when the temperature is higher?

Gather Information Make observations. Research your problem. Ex- It seems like crickets chirp more in the summer when it is hotter.

Form a Hypothesis An educated guess that provides a possible explanation to the problem. Must be testable! Ex- If I increase the temperature, the crickets will chirp more.

Perform an Experiment Design a controlled experiment to test your hypothesis with only one manipulated variable. Ex- I will observe and record the chirping behavior of crickets at different temperatures.

Variables (factors that can change) Manipulated Variable: a variable that is purposely changed Responding Variable: also called the dependent variable, this is the factor that changes in response to the manipulated variable Controlled Experiment: an experiment where all factors but one are the same Ex- temperature Ex- chirping Ex- everything is the same except temperature

Collect and Analyze Data Observe and make measurements Create graphs, charts, or data tables Cricket15 deg. C20 deg. C25 deg. C 191135180 280124169 389130176 478125158 577121157 Average83127168 Ex- Data Table for Number of Chirps per Minute

Develop a Conclusion Use your data to prove or disprove your hypothesis Ex- Cricket chirping does increase with temperature!

Repeat the Work To make sure you did the experiment correctly. To test another variable To test another hypothesis

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