How do I tell the different between physical and chemical

How do I tell the different between physical and chemical
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Standards
NGSSMS-PS1-5
NGSSMS-PS1-2
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This document takes 4 evidences of chemical change and uses flow charts to show when that could be considered physical vs chemical changes.

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NGSSMS-PS1-5
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. Emphasis is on law of conservation of matter and on physical models or drawings, including digital forms, that represent atoms. Assessment does not include the use of atomic masses, balancing symbolic equations, or intermolecular forces.
NGSSMS-PS1-2
Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred. Examples of reactions could include burning sugar or steel wool, fat reacting with sodium hydroxide, and mixing zinc with hydrogen chloride. Assessment is limited to analysis of the following properties: density, melting point, boiling point, solubility, flammability, and odor.
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