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Students Please take out your notebook and open to page 19.

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Presentation on theme: "Students Please take out your notebook and open to page 19."— Presentation transcript:

1 Students Please take out your notebook and open to page 19

2 The Scientific Method

3 7 Steps of the Scientific Method 1.State the Problem 2.Research/ prior knowledge 3.Hypothesis 4.Experiment/ collect data 5.Analyze the Data 6.Conclusion 7.Retest

4 1. State the Problem A question/ problem that you want to solve EXAMPLE: Do plants need light to grow?

5 2. Research Collect information on your question Prior knowledge EXAMPLE: Prior Knowledge- Plants in your house, gardens, green houses, farms, meadows, etc.

6 3. Hypothesis educated guess Answer to your problem Based on prior knowledge and research “If/Then statement” EXAMPLE: If I give the plants light then they will grow. With out light, plants will wither and die.

7 4. Experiment Test the hypothesis Collect the data Must be measurable EXAMPLE: Set up different groups of plants and expose them to different amounts of light Measure the plants to see which ones grow the tallest

8 5. Analyze the Data Organize the data into: –A–A chart/ table –A–A graph –p–picture EXAMPLE: Graph showing that the plant that received the most light grew the tallest.

9 6. Conclusion Describe your results Accept or reject your hypothesis State why you accepted or rejected EXAMPLE: I accept my hypothesis because the plants that received the light grew the tallest while my plants that received no light died

10 7. Retest & Share Do several trials of your experiment: Share your results with other scientists

11 Medical Science Scientific MethodHigh Cholesterol State the ProblemPatient has high cholesterol Research/ Prior Knowledge Research information about cholesterol HypothesisCertain chemicals may dissolve cholesterol deposits ExperimentGive 100 patients these chemicals and 100 patients a placebo AnalyzeSame number of patients lowered their cholesterol as did the placebo patients ConclusionThese chemicals did not reduce cholesterol Retest/ ShareModify hypothesis/ retest/ publish results

12 Everyday Science Scientific MethodCar repair State the ProblemEngine won’t turn over Research/ Prior Knowledge Find reasons why engine won’t turn over HypothesisPredict that the battery is dead ExperimentReplace battery AnalyzeEngine now turns on ConclusionCars won’t work without a fully loaded battery Retest/ ShareTell other people

13 Everyday Science Scientific MethodHeart rate State the ProblemHeart beats at different speeds Research/ Prior Knowledge Find reasons why your heart rate would change HypothesisIf I _______ then _______ ExperimentTake resting heart rates, and heart rates after running. Analyze Conclusion Retest/ Share

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