How Scientists Think and Work: Vocabulary Observation Quantitative Observation Qualitative Observation Measurement Inference Prediction/Hypothesis Conclusion Scientific Method Data Operational Definition Variable Control Independent Variable Dependent Variable

Graphing Variables y x Independent Dependent

The Scientific Method- How to Design a Controlled Experiment Control- Variable- Independent Variable- Dependent Variable- Something that remains the same throughout the experiment Something that changes in an experiment something that the researcher changes in an experiment (manipulated) (responding) Something that changes in response to the independent variable * measurable (it is your data)

Control Group the group of test subjects left untreated or unexposed to some procedure and then compared with treated subjects

Example: A botanist is designing an experiment about the relationship between pea plant growth and sunlight. Qu estion : Does sunlight effect pea plant growth? Hy pothesis : If pea plants are exposed to more sunlight in a day, then they will grow taller. In dependent Variable: Dependent Variable: Controls (Constants):