Difference between revisions of "HS-PS1-7"
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{{Navlinks|HS-PS1-6|HS-PS1-11|← HS-PS1-6|HS-PS1-11 →}} | {{Navlinks|HS-PS1-6|HS-PS1-11|← HS-PS1-6|HS-PS1-11 →}} | ||
{{learningstandard | {{learningstandard | ||
| + | | topic = Conservation of Mass | ||
| ls = Use mathematical representations to support the claim that atoms, and therefore mass, are conserved | | ls = Use mathematical representations to support the claim that atoms, and therefore mass, are conserved | ||
during a chemical reaction. | during a chemical reaction. | ||
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| ab = Assessment does not include complex chemical reactions. | | ab = Assessment does not include complex chemical reactions. | ||
}} | }} | ||
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| + | == {{Referencetablesheading}} == | ||
| + | Relevant reference tables: | ||
| + | *[[Periodic Table of the Elements]] | ||
| + | *[[Mathematical Relationships#mole|Mathematical Relationships – 1 mole = molar mass (g) = 6.02 × 10<sup>23</sup> particles = 22.4 L at STP]] | ||
| + | |||
== {{Assessmentheading}} == | == {{Assessmentheading}} == | ||
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! style="padding: 0.5em 1.5em;" | Question | ! style="padding: 0.5em 1.5em;" | Question | ||
|- | |- | ||
| − | | rowspan="4" style="background-color:white;" | [[August 2026 Chemistry Exam|August 2026]] | + | | rowspan="4" style="background-color:white;" | [[August 2026 Chemistry Exam|August 2026 Chemistry Regents]] |
| style="background-color:white;" | [[Questions:Electricity Generation in New York State|Electricity Generation in New York State]] | | style="background-color:white;" | [[Questions:Electricity Generation in New York State|Electricity Generation in New York State]] | ||
| style="background-color:white;" | [[Questions:Electricity Generation in New York State#q3|Question 3]] | | style="background-color:white;" | [[Questions:Electricity Generation in New York State#q3|Question 3]] | ||
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| style="background-color:white;" | [[Questions:Catalytic Converter in Cars#q2|Question 31]] | | style="background-color:white;" | [[Questions:Catalytic Converter in Cars#q2|Question 31]] | ||
|- | |- | ||
| − | | rowspan="4" style="background-color:white;" | [[June 2026 Chemistry Exam|June 2026]] | + | | rowspan="4" style="background-color:white;" | [[June 2026 Chemistry Exam|June 2026 Chemistry Regents]] |
| style="background-color:white;" | [[Questions:Chemistry of Beverages|Chemistry of Beverages]] | | style="background-color:white;" | [[Questions:Chemistry of Beverages|Chemistry of Beverages]] | ||
| style="background-color:white;" | [[Questions:Chemistry of Beverages#q1|Question 6]] | | style="background-color:white;" | [[Questions:Chemistry of Beverages#q1|Question 6]] | ||
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| style="background-color:white;" | [[Questions:Chip Bag: PFAS vs PLA Plastics#q1|Question 33]] | | style="background-color:white;" | [[Questions:Chip Bag: PFAS vs PLA Plastics#q1|Question 33]] | ||
|- | |- | ||
| − | | rowspan="3" style="background-color:white;" | [[Chemistry sample question clusters| | + | | rowspan="3" style="background-color:white;" | [[Chemistry sample question clusters|Chemistry sample clusters]] (Spring 2025) |
| style="background-color:white;" | [[Questions:Smartphone Chemistry Sample Cluster|Smartphone Chemistry]] | | style="background-color:white;" | [[Questions:Smartphone Chemistry Sample Cluster|Smartphone Chemistry]] | ||
| style="background-color:white;" | [[Questions:Smartphone Chemistry Sample Cluster#q3|Question 3]] | | style="background-color:white;" | [[Questions:Smartphone Chemistry Sample Cluster#q3|Question 3]] | ||
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== Vocabulary == | == Vocabulary == | ||
Terms from the [[Chemistry Glossary]] that come from this standard or from the released exam questions that assess it. | Terms from the [[Chemistry Glossary]] that come from this standard or from the released exam questions that assess it. | ||
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* structural formula – drawn but not named in [[Questions:Chip Bag: PFAS vs PLA Plastics#q1|June 2026 Chip Bag]] Figure 1 and the [[Questions:Equilibria in the Blood#q2|June 2026 Equilibria in the Blood]] rubric. | * structural formula – drawn but not named in [[Questions:Chip Bag: PFAS vs PLA Plastics#q1|June 2026 Chip Bag]] Figure 1 and the [[Questions:Equilibria in the Blood#q2|June 2026 Equilibria in the Blood]] rubric. | ||
</div> | </div> | ||
| + | |||
| + | {{PerformanceLevel}} | ||
| + | {{PLTable | ||
| + | | Level5 = Create and revise mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction. | ||
| + | | Level4 = Use mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction. | ||
| + | | Example4 = <span class="pld-chip pld-chip-chem">[[Questions:PSC A Profitable Blueberry Field#q5|Sample · Profitable Blueberry Field Q5]]</span> | ||
| + | | Level3 = Construct a mathematical representation and/or calculate a quantity (e.g. # of particles, volume of a gas, etc.), using the relationship that atoms and/or mass are conserved during a chemical reaction. | ||
| + | | Example3 = <span class="pld-chip pld-chip-chem">[[Questions:Catalytic Converter in Cars#q2|Aug 2026 · Q31]]</span> <span class="pld-chip pld-chip-chem">[[Questions:Electricity Generation in New York State#q3|Aug 2026 · Q3]]</span> <span class="pld-chip pld-chip-chem">[[Questions:The ABCs of Ultraviolet Radiation#q4|Aug 2026 · Q29]]</span> <span class="pld-chip pld-chip-chem">[[Questions:Balloon Arches#q2|June 2026 · Q24]]</span> <span class="pld-chip pld-chip-chem">[[Questions:Chemistry of Beverages#q1|June 2026 · Q6]]</span> <span class="pld-chip pld-chip-chem">[[Questions:PSC A Profitable Blueberry Field#q4|Sample · Profitable Blueberry Field Q4]]</span> <span class="pld-chip pld-chip-chem">[[Questions:Smartphone Chemistry Sample Cluster#q3|Sample · Smartphone Chemistry Q3]]</span> | ||
| + | | Level2 = Use or complete a mathematical representation to demonstrate that atoms and/or mass are conserved during a chemical reaction. | ||
| + | | Example2 = <span class="pld-chip pld-chip-chem">[[Questions:Chip Bag: PFAS vs PLA Plastics#q1|June 2026 · Q33]]</span> <span class="pld-chip pld-chip-chem">[[Questions:The Accidental Development of Breathable, Waterproof Fabric#q1|June 2026 · Q15]]</span> | ||
| + | | Level1 = Use information provided to identify mathematical representations that demonstrate atoms and/or mass are conserved during a chemical reaction. | ||
| + | | Example1 = <span class="pld-chip pld-chip-chem">[[Questions:The Fruit Industry in New York State#q3|Aug 2026 · Q8]]</span> | ||
| + | }} | ||
== {{Resourcesheading}} == | == {{Resourcesheading}} == | ||
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| TOPIC = HS. Chemical Reactions | | TOPIC = HS. Chemical Reactions | ||
}} | }} | ||
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Latest revision as of 17:30, 25 October 2026
Use mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction.
Clarification statement: Emphasis is on using mathematical ideas to communicate the proportional relationships between masses of atoms in the reactants and the products, and the translation of these relationships to the macroscopic scale using the mole as the conversion from the atomic to the macroscopic scale. Emphasis is on assessing students’ use of mathematical thinking and not on memorization and rote application of problem-solving techniques.
Assessment boundary: Assessment does not include complex chemical reactions.
Reference Tables
Relevant reference tables:
- Periodic Table of the Elements
- Mathematical Relationships – 1 mole = molar mass (g) = 6.02 × 1023 particles = 22.4 L at STP
Regents Exam Questions
Released New York State Regents exam questions that assess HS-PS1-7 are listed here by exam and question cluster. Each link opens the question with its answer key.
Vocabulary
Terms from the Chemistry Glossary that come from this standard or from the released exam questions that assess it.
From this standard
- atom
- chemical property
- chemical reaction
- claim
- closed system
- conservation of atoms
- conservation of mass
- conversion factor
- element
- energy
- gas
- macroscopic scale
- mass
- mathematical representation
- matter
- mole
- particle
- phenomenon
- product
- properties
- proportional relationship
- reactant
- reaction
- volume
From released exam questions
- balanced equation – Aug 2026
- bioplastic – June 2026
- bond – June 2026
- climate change – Aug 2026
- coefficient – June 2026
- complete combustion – Aug 2026
- concentration – June 2026
- conservation of matter – Aug 2026, June 2026
- criteria – June 2026
- evidence – Sample 2025
- high temperature – June 2026
- molar mass – June 2026
- molecule – June 2026
- monomer – June 2026
- oxide – Sample 2025
- pressure – June 2026
- significant figures – June 2026, Sample 2025
- solution – June 2026
- substance – June 2026, Sample 2025
- synthesis – Aug 2026
- temperature – June 2026
Implied by this standard
- Avogadro’s number – implied by "the mole as the conversion from the atomic to the macroscopic scale"
- molar volume (22.4 L/mol at STP) – implied by "calculate a quantity (e.g. # of particles, volume of a gas)"
- mole ratio – the Smartphone Chemistry rubric multiplies by "2 moles Al2O3 / 4 moles Al".
- stoichiometry – implied by "proportional relationships between masses of atoms in the reactants and the products"
- structural formula – drawn but not named in June 2026 Chip Bag Figure 1 and the June 2026 Equilibria in the Blood rubric.
Performance Level Descriptions
Every Regents exam question on HS-PS1-7 is written to match one of the performance level descriptions (PLDs) below.
Level 1: Use information provided to identify mathematical representations that demonstrate atoms and/or mass are conserved during a chemical reaction. Aug 2026 · Q8
Level 2: Use or complete a mathematical representation to demonstrate that atoms and/or mass are conserved during a chemical reaction. June 2026 · Q33 June 2026 · Q15
Level 3: Construct a mathematical representation and/or calculate a quantity (e.g. # of particles, volume of a gas, etc.), using the relationship that atoms and/or mass are conserved during a chemical reaction. Aug 2026 · Q31 Aug 2026 · Q3 Aug 2026 · Q29 June 2026 · Q24 June 2026 · Q6 Sample · Profitable Blueberry Field Q4 Sample · Smartphone Chemistry Q3
Level 4: Use mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction. Sample · Profitable Blueberry Field Q5
Level 5: Create and revise mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction.
Resources
Examples and discussion of resources for the learning, teaching, and assessment of HS-PS1-7.
This section could be expanded upon. You can help out by adding to this section.
NGSS Dimensions
Performance expectation HS-PS1-7 was developed using the following elements from the NRC document A Framework for K-12 Science Education:
Science and Engineering Practices
- Using Mathematics and Computational Thinking
- Use mathematical representations of phenomena to support claims.
Disciplinary Core Ideas
- PS1.B: Chemical Reactions
- The fact that atoms are conserved, together with knowledge of the chemical properties of the elements involved, can be used to describe and predict chemical reactions.
Crosscutting Concepts
- Energy and Matter
- The total amount of energy and matter in closed systems is conserved.
Page contributors: Conrad Richman, Caroline Leonard