Nature of Science Notes Part II- Experimental Design.

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Nature of Science Notes Part II- Experimental Design

 What is the question or problem?

 Gather information about the problem by using two types of observations: 1. Quantitative -descriptions that use numbers (ex. -2C, 200 ml) 2. Qualitative – descriptions that do not use numbers (ex. color, odor, touch)

 A tentative explanation.  A statement that can be tested.  Written in If… then… format.  Imagination and creativity

Experimental design includes three variables: 1. Independent- variable that can be changed. 2. Dependent- variable that changes in response to the independent variable. 3. Controlled- all other variables kept consistent during experiment.

YearJan.Feb.MarchAprilMayJuneJulyAug.Sept.Oct.Nov.Dec.Annual Observations and analysis continued. Data Table. Atmospheric carbon dioxide concentrations in Mauna Loa, Hawaii.

 Observations and analysis continued. Same data analyzed in a graph.

 Do you accept or reject your hypothesis?  Refer to data to support your statements.  Discuss possible experimental error.