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NIS - BIOLOGY. Lecture 1 The Nature of Science and the Scientific Method Ozgur Unal. The Nature of Science. Science is a process that uses observation and investigation to gain knowledge about the events in nature . Science : What does come to your mind ?.

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Nis biology

NIS - BIOLOGY

Lecture 1

TheNature of ScienceandtheScientificMethod

OzgurUnal


The nature of science

TheNature of Science

  • Science is a processthatusesobservationandinvestigationtogainknowledgeabouttheevents in nature.

Science: Whatdoescometoyourmind?

  • Observation:Act of gatheringinformation

  • Inferences:Drawingconclusionsfromobservations

  • Investigation:Includesobserving, experimenting, modelling


The scientific method

TheScientificMethod

ScientificMethod


The scientific method1

TheScientificMethod

Hypothesis: An educatedguess

Experiment: A wayto test hypothesis

Collect data

Analyze data

Drawconclusions

Serendipity?

  • Experimentsincludevariables:

    • Dependentvariables

    • Independentvariables

    • Constants


The scientific method2

TheScientificMethod

Question: Howdoesthethickness of theseedcoataffectthegermination rate of theseeds?

Hypothesis?

  • Ifthethickness of thecoating is smaller, theseedsgerminatefaster.

  • Design an experimenttotestyourhypothesis:

    • A seedwithscratchedcoat

    • A seedwith a hole in thecoat (nicked)

    • A seedwith an unscratchedcoat


The scientific method3

TheScientificMethod

Coatingthickness

Germination rate

Temperature, amount of sunlight, wateretc.

Identifyvariables:

Independentvariable:

Dependentvariable:

Constant:

  • Control: Theseedwith normal coatingis usedtocomparethegrowthrates.


The scientific method4

TheScientificMethod

Performtheexperiment, collectandrecordyour data:

  • Drawconclusions: ??

  • Shareyourresults: Communicate


The scientific method summary

TheScientificMethod - Summary


The scientific method5

TheScientificMethod

Astronomy vs Astrology

Whichone is a science? Why?


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