S12natofscipost

S12natofscipost - Explanation called a hypothesis A...

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What is Science Lecture 2
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Lecture 2 Outline I. What is Science? A. Some Scientific Assumptions B. Forms of Scientific Inquiry II. Scientific Design A. Scientific Method B. Theory and Laws III. Scientific Method in Action Reading: Chap. 1 pp. 2-22 (specifically 10-15)
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Forms of Scientific Inquiry Discovery or Descriptive Science Observation Qualitative vs. Quantitative data Jane Goodall: notes on chimp behavior etc. CDC: data and statistics gathered on outbreaks etc.
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Forms of Scientific Inquiry Discovery or Descriptive Science Observation Qualitative vs. Quantitative data Hypothesis-Based Science Uses deductive reasoning: start with general hypothesis and make specific predictions to test (note use of “reasoning”, hypotheses are not guesses, educated or not!)
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Scientific Design Science is not just a collection of facts, it is a path to understanding how the natural world works, and how it got to be the way it is. Scientific knowledge begins with an observation and a proposed explanation.
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Unformatted text preview: Explanation called a hypothesis A hypothesis is testable-ie evidence can be gathered to determine accuracy In science hypotheses are tested by using them to make predictions about how a particular system will behave Example Hypothesis: all objects fall when dropped Test this by dropping objects Each object we drop is a test of our prediction, the more successful tests the more confidence in our hypothesis What if we drop a helium balloon? What if we drop something in the space shuttle in space? These are clear exceptions to our original hypothesis-does this make our hypothesis invalid? Make observation Via predictions Scientific Method Make observation/Identify question What is already known about the phenomenon in question? Formulate hypothesis: a testable explanation Null Hypothesis: no effect hypothesis Propose predictions to test hypothesis and collect data Confirmation bias :...
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S12natofscipost - Explanation called a hypothesis A...

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