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### NIS - BIOLOGY

### TheNature of Science

### TheScientificMethod

### TheScientificMethod

### TheScientificMethod

### TheScientificMethod

### TheScientificMethod

### TheScientificMethod - Summary

Lesson Objectives:

Explain the characteristics of science

Compare something that is scientific with something that is not scientific

Summarize the scientific method

Describe the difference between an observation and an inference

Differentiate among control, independent variable, and dependent variable

- Science is a processthatusesobservationandinvestigationtogainknowledgeabouttheevents in nature.

Science: What comes to your mind?

- Observation:Act of gatheringinformation
- Inferences:Drawingconclusionsfromobservations
- Investigation: Includes observing,
- experimenting, modelling

ScientificMethod

Hypothesis: An educatedguess

Experiment: A wayto test hypothesis

Collect data

Analyze data

Draw conclusions

Serendipity?

- Experimentsincludevariables:
- Dependentvariables
- Independentvariables
- Constants

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

Coatingthickness

Germination rate

Temperature, amount of sunlight, wateretc.

Identifyvariables:

Independentvariable:

Dependentvariable:

Constant:

- Control: Theseedwith normal coatingis usedtocomparethegrowthrates.

Performtheexperiment, collectandrecordyour data:

- Drawconclusions: ??

- Shareyourresults: Communicate

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