Scientific Method

Experiment

• A process used to gather observations and test hypothesis.

Variable

• What is being manipulated (changed) or measured in an experiment.

Dependent Variable

• The factor is forced to change because the independent variable is changed.

• What is measured!!!!

Independent Variable

• The factor in an experiment that is changed by the experimenter.

Control Variable

• The group that does not receive the experimental treatment.

Constants

• The factors in an experiment that do not change.

Hypothesis

• An explanation of how something works.

• Usually an - If…Then…- statement.

Materials

• A list of items needed for the investigation.

Procedure

• A list of steps to be followed during a scientific investigation.

• Number your items (1, 2, 3…..)

Data Table

• A place to store data during a scientific experiment.

Graph

• An illustration used to show the relationship between variables.

Results

• A summary of the data collected during an investigation.

Conclusion

• A summary and reflection of the investigation which occurs at the end of the experiment.

Positive or Direct Relationship

• As one variable increases the other variable also increases. (Scatter Plot with a best fit line going up)

Negative or Indirect Relationship

• As one variable increases, the other variable decreases. (A scatter plot with a best fit line going down)

No Linear Relationship

• The relationship between two variables that cannot be shown with a straight line. (Scatter plot without a best fit line)