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Nature of Science

Descriptive Investigation "I" do NOT change variables. I am merely recording observations. Example: Determining the number of cookies students buy at lunch.
Comparative Investigation There are 2 or more different conditions and "I" do NOT change the condition. Example: Comparing the number of cookies bought versus the number of apples bought at lunch.
Experimental Investigation There are 2 or more different conditions and "I" DO change the condition. Example: Determining if eating a cookie at lunch or not has an effect on the probability of getting a detention after lunch.
Observations process of obtaining information by using the senses
Independent Variable (Manipulated) It is what "I" change in an experiment
Dependent Variable (Responding) something measured during an experiment to determine if there was a change. (responding to the new independent variable) Example: If you eat a cookie at lunch, you have a 25% greater chance of earning a detention. # of detentions is the DV
Constant (Controlled Variable) something that is not changed throughout an experiment
Experimental Group the group in an experiment that receives the changed variable being tested
Control Group group in an experiment or study that does not receive new changed variable. All further experiments are compared to the control group.
Hypothesis testable idea that leads to a scientific investigation. It is an "If, then" statement
Conclusion a decision reached after an investigation. Answers if the hypothesis was "correct"
Trials the numerous, repetitive times an experiment is completed. The more trials there are, the more accurate the results should be
Theory A question that has already undergone extensive testing by various scientists and is generally accepted as being the explanation of an observation.
Law Is a statement based on repeated experimental observations that describe some aspects of the universe and always applies under the same conditions.
Model A description (it can be material, visual, mathematical or computational) of an object or phenomenon that shares important characteristic with the object or phenomenon.
Qualitative data is not numerical, is observed using the 5 senses and describes the observation
Quantitative data can be measured numerically and can be analyzed statistically
Inference An educated guess on why something is happening or what may occur next
Created by: mvanderb