MS. Chemical Reactions
Associated Units:
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Periodic Table
Mass and Chemical Reactions
To demonstrate mastery of the Performance Expectation(s) associated with this and related unit
modules:
MS-PS1-1.
Develop models to describe the atomic composition of simple molecules and extended
structures.
MS-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. They will organize data and identify patterns
about the characteristic physical and chemical of pure substances before and after they interact.
Students will analyze the data to identify patterns, including the changes in physical and
chemical properties of each substance before and after the interaction. They will support their
interpretation of the data by describing that the change in properties of substances is related to
the rearrangement of atoms in the reactants and products in a chemical. Students will develop a
model in which they identify the relevant components for a given chemical reaction, including
the types and number of molecules that make up the reactants and products.
MS-PS1-3.
Students will obtain information from published, grade-level appropriate material and determine
and describe whether the gathered information is relevant along with the credibility, accuracy,
and possible bias of each source. Students will synthesize information and present in various
modes (e.g., graphs, diagrams, photographs, text, mathematical, verbal to design a system that
transfers thermal energy throughout an open and closed system.
MS-PS1-5.
Students will 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. Design, test and modify an
investigation to test the model communicating the results using context, tables, graphs and
media.
Chemical/Physical Properties Unit
To demonstrate mastery of the Performance Expectation PS1.A, lesson unit may include the
following objectives, vocabulary and assessments:
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Describe how mass and volumes are measured.
Measure and compare mass and weight.
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Measure and calculate density of materials, comparing those of solid, liquid and gas.
Understand that density is a characteristic property and does not change with size and
shape of material.
Measure and calculate density.
Use density to identify substances.
Demonstrate how density is a derived quantity and how its values are dependent upon
accuracy of measurements.
Compare density of materials and explain uses of materials based upon the property of
density.
Infer under what conditions physical and chemical properties may change and measure
the effects of temperature and pressure.
Identify and define physical and chemical properties of materials as characteristic
properties.
Measure and compare physical properties under various conditions.
Compare and contrast physical and chemical properties.
Identify indicators of chemical changes.
Demonstrate that in a chemical change new substances are created with different
properties.
Observe and classify substance changes as physical or chemical.
Vocabulary
Matter
Physical Property
Chemical Change
Adhesion
Hardness
Brittle
Melting Point
Condensation Point
Viscosity
Flammability
Mass
Chemical Property
Density
Elasticity
Malleable
Electrical Conductivity
Freezing Point
Reactivity
Surface Tension
Volume
Weight
Physical Change
Cohesion
Indicator
Ductile
Thermal Conductivity
Boiling Point
Precipitate
Characteristic
Tensile Strength
Suggested Resources
 Holt Physical Science
 STC Properties of Matter - Density
 STEMScopes – Chemical Properties and Interactions
 Internet Media
 Vernier Probewear
Assessment
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Modeling
Argue: Claim-Evidence-Reasoning
Multiple Choice
Open-Ended Response
Scientific Investigation, Problem Solving and Engineering Design
Unit: Periodic Table
To demonstrate mastery of the Performance Expectations PS1.A and PS1.B, lesson unit may
include the following objectives, vocabulary and assessments:
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Explain how elements are arranged in the Periodic Table.
Know that there are groups of elements that have similar properties.
Identify the common properties of groups of the Periodic Table.
Compare and contrast metals, metalloids and non-metals.
Explain why groups of elements have similar physical and chemical properties.
Identify and classify elements as either a metal, non-metal or metalloid based upon its
properties.
Conduct element research identifying structure, sources, abundance and various uses
and future use, application and availability.
Vocabulary
Periodic
Alkali Metal
Halogen
Actinides
Reactive
Semi-Conductor
Atomic Number
Group/Family
Alkaline Earth Metal
Transition Metals
Radioactive
Conductor
Symbol
Element
Period
Noble Gas
Lanthanides
Inert
Insulator
Atomic Mass/Weight
Suggested Resources
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Modeling
Holt Physical Science
STC Properties of Matter - Density
STEMScopes – Structure of Matter
Research, design and communication
Internet Media
Vernier Probewear
Unit: Chemical Reactions/Conservation of Mass
To demonstrate mastery of the Performance Expectation, PS1.A, PS1.B, ETS1B and ETS1C
lesson unit may include the following objectives, vocabulary and assessments:
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Demonstrate that regardless of how substances within an open or closed system interact;
the total mass of the system is conserved.
Explain that chemical reactions involve a transfer of energy in to or out of a system.
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Illustrate how atoms are rearranged when substances react, but that the total number of
atoms and the total mass of the products remains the same as the original substances.
Explain why when two or more substances combine to make a solution the combined
mass of the substances is conserved but not the volume.
Measure, record, analyze and interpret data measure mass before and after chemical
reactions.
Know that all matter is composed of atoms that may join together to form molecules and
compounds.
Relate atoms that make up the molecules of reactants rearrange to those of the product
Know that each type of atom has a specific mass, which is the same for all atoms of that
type.
Explain that chemical reactions involve a transfer of energy in to or out of a system.
Demonstrate that regardless of how substances within a closed system interact; the total
mass of the system is conserved.
Balance chemical equations using mathematical formulas.
Vocabulary
Chemical Equation
Reactants
Compound
Subscript
System
Conservation
Products
Element
React
Open System
Yield
Molecule
Coefficient
Energy
Closed System
Suggested Resources
 Holt Physical Science
 STC Properties of Matter - Density
 STEMScopes – Characteristics of Chemical Reactions, Energy in Chemical Reactions
 Internet Media
 Vernier Probewear
Assessment
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Modeling
Argue: Claim-Evidence-Reasoning
Multiple Choice
Open-Ended Response
Element Research and Presentation