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Scientific Method Steps

Explore the scientific method steps through an experiment to determine which soap produces the largest bubble. Learn about control variables, qualitative and quantitative data, and the significance of observations and inferences.

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Scientific Method Steps

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  1. Scientific Method Steps • 1. Problem/Question- what question does the researcher want answered? The question must be testable. • 2. Research- you must gather information from online sources, books, printed material, other people, and prior knowledge • 3. Hypothesis- a possible explanation for observations that relate to a scientific question; must be testable; must include the words if, then, and because • 4. Conduct an Experiment- complete an experiment to test hypothesis; the experiment includes procedures and can involve observations (5 senses); uses 3 variables- independent, dependent, and control • 5. Record Results- record the data gathered from an experiment in a table, chart, or graph • 6. Conclusion- communicate results and explain possible errors that occurred

  2. Qualitative vs. Quantitative • Qualitative- describes data and does NOT include numbers; observations (5 senses) • Examples: color, texture, smell, sight, shape, taste, size • Quantitative-data that includes NUMBERS • Examples: height, length, width, number,

  3. Reflection • Give 3 examples of qualitative data • 1. • 2. • 3. • Give 3 examples of quantitative data • 1. • 2. • 3.

  4. Bubble Bonanza Question Which type of soap will produce the largest bubble?

  5. Bubble Bonanza Hypothesis If the ((Hand or dish soap or both) is used, then it will create a (bigger or smaller) bubble, because ___________________.

  6. Bubble Bonanza Solution A Pink Solution Solution B Dark yellow

  7. 3 types of variables

  8. Control Variables/Group • Control Variables- variables that stay the SAME; there can be more than one • Control Group- serves as a method of comparison; does NOT receive the test subject • Example: measure the effect of different types liquids on plant growth. • Liquids: water, diet coke, lemonade, Coca-Cola, and tea

  9. Independent Variables • Independent- variable that is CHANGED in an experiment; manipulated • Ex. Measuring the effect of different liquids on plant growth: independent- type of liquid

  10. Dependent Variables • Dependent- variable that is MEASURED • Ex. Measuring the effect of different liquids on plant growth: Dependent- plant growth

  11. DRY MIX • D- Dependent • R-Responding • Y-Y-Axis • M-Manipulated • I-Independent • X- X-Axis

  12. Observation vs. inference • Observations are: • 1. Factual • 2. objective • 3. gathered using 5 senses • 4. free of opinion/ideas Inferences are: 1. conclusion/assumption 2. based on observations 3. subjective 4. formed from an opinion- previous knowledge Ex. 5 plants- watered with: water, Gatorade, coca-cola, diet coke, lemonade

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