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Objectives Outline the main steps in the scientific method List the elements of a controlled experiment.

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Presentation on theme: "Objectives Outline the main steps in the scientific method List the elements of a controlled experiment."— Presentation transcript:

1 Objectives Outline the main steps in the scientific method List the elements of a controlled experiment

2 The Scientific Method General steps in the scientific method Observe (question) Hypothesis (prediction) Testing/Experimentation Analyze Repeat the test or devise a new one Report The Tools of Science

3 Observation You notice that these plants are not the same size. Collect some data.

4 Full Sun ShadeShade ShadeShade If plants are in full sunlight then they grow taller because they can photosynthesize more. Hypothesis Hypothesis: An educated guess that attempts to answer the question at hand

5 Controlled Light Experiment Develop ways to test your hypothesis. Controlled experiment Determine the independent variable (what you are changing) The only factor that will change. In this case; light. All other factors are the same; soil, moisture, fertilizer, etc.

6 Shade, no direct light More Controlled Light Control. Less controlled light Experiment Control group All variables remain constant. Experimental group The group where the independent variable is changed Results from the experimental group will be compared to the control group

7 Control. Less controlled light More Controlled Light Portion of experiment you can measure. Ex. Height of plant Experiment Dependent variable Any changes that resulted from manipulating the independent variable Shade, no direct light

8 Variables Independent variable (changing) Amount of light Dependent variable (can measure) Growth of plant Experimental group Plants in full sunlight Control group Plants in partial sunlight

9 Data- Collect information, typically in the form of a chart to show what was measured in the experiment. Height of plant (cm) DaysFull sunlight Part sunlight 14 cm 46 cm5 cm 77 cm5 cm 108 cm5 cm 1310 cm6 cm

10 Analysis Analyze your data. If you had statistical data you collected, you would show results in a graph. Independent variable (what is being changed) – x axis Dependent variable (what is being measured) – y axis

11 Conclusion Conclusion: Simply state whether or not your data supports your hypothesis. Ex. Based upon the results of my experiment... Guess what I found out!?...


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