Scientific Inquiry<br />Chapter 1, Section 2 – The Nature of Science & Technology<br />
Scientific inquiry refers to the diverse ways in which scientists study the natural world and propose explanations based on the evidence they gather.<br />What is scientific inquiry?<br />
Scientific inquiry often begins with a problem or question about an observation<br />Some questions CANNOT be answered by scientific inquiry<br />Questions dealing with personal tastes or judgments <br />Posing Questions<br />
A hypothesis is a possible explanation for a set of observations or answer to a scientific question<br />IS NOT a fact<br />MUST be testable<br />Developing a Hypothesis<br />
Designing an experiment requires several steps:<br />Controlling variables<br />Controlling the Experiment<br />Forming “Operational Definitions”<br />On the next few slides we will look at these steps in further detail……<br />Designing an Experiment<br />
A variable is a factor that can change in an experiment<br />The one variable that is purposely changed to test your hypothesis is the MANIPULATED VARIABLE (or independent variable)<br />The factor that MAY change in response to the manipulated variable is the RESPONDING VARIABLE (or dependent variable)<br />Controlling Variables<br />
An experiment in which only one variable is manipulated at a time is a CONTROLLED EXPERIMENT<br />Why is it important to control your experiment???<br />Controlling the Experiment <br />
An operational definition is a statement that describes how to measure a particular variable or define a particular term<br />Forming operational definitions<br />
Data are the facts, figures, and other evidence gathered through observations<br />Keep track of data in a data table<br />Then make a graph of your data….<br />Collecting and Interpreting Data<br />
A conclusion is a summary of what you have learned in an experiment<br />Points to consider in your conclusion:<br />Does the data support the hypothesis?<br />Did you collect enough data?<br />Did anything happen that may have affected the results?<br />Address these points in your summary<br />Drawing conclusions<br />
An important part of the scientific inquiry process is communicating your results<br />Communicating is the sharing of ideas and experimental findings through writing and speaking<br />Communicating<br />
A scientific theory is a well-tested explanation for a wide range of observations or experimental results<br />A scientific law is a statement that describes what scientists expect to happen every time under a particular set of conditions<br />Scientific Theories and Laws<br />
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