Components of Scientific Experiment Title Background information Hypothesis Materials Controls & Variables Procedure Data & Analysis Conclusion
Variables Variables are factors that change during experiment. Independent Variable (IV): variable that is purposely changed during experiment Dependent Variable (DV): variable that changes in response to purposeful change (IV)
Controls: Variable that all others will be compared to Allows variables to be compared to something Procedure: step by step instructions of what you will do Constant: Experimental aspect that is kept the same for all trials
Title of Experiment: The Effect of (Insert Independent Variable Here) on (Insert Dependent Variables Here). Hypothesis of Experiment: If (planned change in independent variable), then (predicted changed in dependent variable) Or another way to look at it… If (I do this) , then (this) will happen. Test your hypothesis by doing the experiment
Example: Test insulation of different materials on jar of water Title: The Effect of Type of Insulation Wrap on Temperature of Water in a Jar Hypothesis: If jars of water in the sun are wrapped with different types of insulation, then the temperature of the water in the jars will increase by different amounts. IV: Type of insulation DV: Change in temperature of water in jar
Data & Results Analyze your data: Qualitative (They’re hot!), Quantitative (They’re a 10!) Create a graph/chart Conclusion: Briefly restate hypothesis Answer to your question Explain your results (How & Why) Describe any modifications and next steps.
Practice Science Method A group of scientists want to measure the effect of adding different types of nutrients to the same plant species. They plan to add 3 different nutrients to the different species and measure the effect on the plant’s growth. What is the independent variable? What is the dependent variable? What would be an appropriate control? What are some of the constants? Set up a graph (Title & Labels) for data