Difference between revisions of "HS-PS1-7"
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| − | | 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]] | ||
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| − | | 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]] | ||
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Revision as of 13:01, 13 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.
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.
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.
Level 2: Use or complete a mathematical representation to demonstrate that atoms and/or mass are conserved during a chemical reaction.
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.
Level 4: Use mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction.
Level 5: Create and revise mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction.
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.
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