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Scientific Method s Section 2.1

Scientific Method s Section 2.1. Objectives: List and describe the steps of the experimental method. Describe how scientists study subjects in which experiments are not possible. Experimental Method (aka, “Scientific Method”). Observation Question Hypothesis Experiment

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Scientific Method s Section 2.1

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  1. Scientific MethodsSection 2.1 Objectives: List and describe the steps of the experimental method. Describe how scientists study subjects in which experiments are not possible.

  2. Experimental Method (aka, “Scientific Method”) • Observation • Question • Hypothesis • Experiment • Only allow one variable to change • Use a control group for comparison • Repeat the experiment • Organize and analyze data • Communicate results

  3. Correlation Method • What scientists use when they cannot answer a question experimentally. • What was Earth’s climate like 60 million years ago? • Does smoking cause lung cancer? • Correlation – reliable associations between two or more events • Tree rings • Lost Colony (Roanoke Island, VA) • Jamestown, VA

  4. Chapter 2 Section 1 Scientific Methods Rainfall and Tree Ring Width

  5. Good Scientists Are: • Curious • Skeptical • Open to new ideas • Intellectually honest • Imaginative and creative (John Snow’s spot map)

  6. Chapter 2 Section 1 Scientific Methods John Snow’s Cholera Spot Map

  7. Quick Quiz • Why should the results of an experiment be repeatable? • Why are experiments designed to have as few variables – preferably only one – as possible? • Why is the correlation method a useful accompaniment to the experimental method?

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