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Scientific Method
Question | Answer |
---|---|
Scientific Method | the procedure scientists use to help explain why things happen the way they do |
Problem | something you don't understand but you can do an experiment to help you understand |
Scientific problems | usually based on observation of scientific phenomena; the first step of the scientific method involves being able to recognize the problem |
Observations | consists of receiving knowledge of the outside world through our senses, or recording information using scientific tools and instruments |
Inference | an idea or conclusion that's drawn from evidence and reasoning. An inference is an educated guess; conclusion about our observations |
Hypothesis | a testable explanation for the details you observed |
Experiment | tests the hypothesis |
Variable | something that changes in an experiment |
Data | record of the observations that is analyzed in order to make a conclusion |
Conclusion | an experiment that is repeated several times, in order to rule out accidents and any variables that may not have been considered |
Theory | explanatory statement that’s been repeatedly confirmed through experimental testing |
Scientific knowledge | if a theory is proven valid over and over again |
Control Group | The group or subject that is used as a standard for comparison in an experiment. |
Experimental Group | The group or subjects that is included in the experiment. This is the group where the independent variable is applied. |
Measure | To compare the characteristics of something (such as mass, length, volume) with a standard (such as grams, meters, liters). |
Prediction | A statement made about the future outcome of an experiment based on past experiences or observations. It is found in the "then" portion of a hypothesis. |
Qualitative data | Data that is based on observable characteristics of things or events that can be collected using the five senses. Example: "The juice tastes sweet to me." |
Quantitative data | Data that is based on measurable characteristics of things or events such as mass, volume, length, and quantity. Example: "There is one liter of juice in the carton. |
Independent Variable | A factor that can be changed or manipulated in an experiment by the scientist; "you change it" variables. |
Dependent Variable | A factor that responds to changes in other variables in an experiment; "it changed" variables. |
Constant or controlled Variable | A variable variables that are held the same or constant for all experimental groups. |