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Claim Evidence Reasoning
I know you have seen these before in other classes. This is one of the most important ways we communicate our findings in this class. Therefore, I am going to hold you to a high standard. However, once you get it and understand the formula for writing these, it becomes very straight forward.
Weight vs Mass Lab Solutions with CER
This Google Slides example shows how a CER should be written. The formula is easy:
Claim: Use the language in the research question. If my research question is "What is the relationship between weight and mass?" Your claim should be: The relationship between weight and mass is...(and then what your data shows.)
Evidence: In this class, most of our evidence will be based on the shape of the graph and the equation (mathematical model). That is all you should write. No explanations here.
Reasoning: Every lab has specific requirements for the reasoning however, the general outline is the following which should be put into paragraph form:
What is the big physics idea you are investigating? Is it a definition of a term, Laws of Motion, Newton's 2nd Law, Gravity, Conservation of Momentum, Impulse, Conservation of Energy, Ohm's Law? What does this law say?
How does that big physics idea or law apply to this investigation?
Explain your evidence. In most cases it will be the shape of the graph and the equation. What is the math form of the equation? What is the physics form of the equation? What does the equation allow us to predict or how does it show the relationship? Be very careful here to make sure you understand the Slope or Line of best fit vs R^2.
End your reasoning with: Therefore... (and then restate your claim).
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