This comprehensive Middle School NGSS powerpoint packet on Physical and Chemical Reactions is designed to align with the NGSS Middle School MS-PS1-2 and MS-PS1-5 standards. A visually interactive 50 slide powerpoint covers the main concepts in the standards "analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred" and "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". The physical and chemical properties of substances is covered as well as looking at everyday chemical interactions.
PS1-A - Each pure substance has characteristic physical and chemical properties (for any bulk quantity under given conditions) that can be used to identify it.
PS1-B - Substances react chemically in characteristic ways. In a chemical process, the atoms that make up the original substances are regrouped into different molecules, and these new substances have different properties from those of the reactants. (MS-PS1-2),(MS-PS1-3),(MS-PS1-5)
The total number of each type of atom is conserved, and thus the mass does not change. (MS-PS1-5)
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