In chemistry class, when we answer a question, we call that answer a "claim". You may have heard this term before, in relation to the explanation structure Claim-Evidence-Reasoning. A claim states the relationship between your independent variable and your dependent variable. You do not provide any data or explanation of why this relationship exists. 

Evidence is data that we gather in class, organized to support a claim. It is important that you realize that the data you record from an experiment in class is not automatically evidence. To produce evidence, you will pull two data points from your raw data to support the relationship stated in your claim. For a lab report, you will be required to compose evidence with multiple data point sets. Quantitative data is prioritized over qualitative data if available.

Reasoning is the explanation of why the data is appropriate (i.e., why is this data relevant?) and how the data support the claim. This is where you explain the science behind why your evidence supports your claim.

You already made a claim to answer the question: "In which temperature water did the food coloring spread faster?" on the previous page. It was clear in the experimental video that the food coloring spread faster in hot water. Below, you will be asked to support that claim with evidence and to explain why your evidence supports that claim with reasoning.