Gather, analyze, and communicate evidence of chemical reactions.
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Analyze data from tests to determine similarities and differences among several design solutions to identify the best characteristics of each that can be combined into a new solution to better meet the criteria for success.
Undertake a design project to construct, test, and modify a device that either releases or absorbs thermal energy by chemical processes.
Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.
Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.