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Unit 1 – Lesson 3 (Representing Data)
How do Scientists Make Sense of Data?
• Scientific Investigations involve the collection of Data; facts, figures, and other evidence that scientists gather.
Scientists Organize Data
• Data Tables allow scientists to record observations in an orderly way.
Scientists Graph and Analyze Data
• Scientists Graph data in order to determine trends and patterns within data.
What do Graphs Show?
• Circle Graph – Used when showing how each group relates to the whole
• Bar Graph – Used to display and compare data in a number of categories
• Line Graph – Shows continuous change
How do Scientists Evaluate Models?
• Scientific Model: can be a visual or mathematical representation of an object or system.
• Models help scientists make predictions before an investigation.
How do Scientists Evaluate Models?
• By how much they can Explain.
• Ex. Data from Biology, Chemistry, and Physics went into the making of DNA model.
How do Scientists Evaluate Models?
• By How Well they can Adapt.
• Ex.) Once scientists had a working model of DNA, it allowed scientists to speculate how genetic information is carried.
How do Scientists Evaluate Models?
• By the Fewest Limitations
What Principles do Scientists use when Measuring Experimental
Results?
• Scientists Measure for Precision and Accuracy.
Precision
• Precision: The exactness of a measurement
Accuracy
• Accuracy: how well or how closely data agree with a known standard.