Difference between revisions of "HS-PS1-7"

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{{DISPLAYTITLE:HS-PS1-7 {{!}} Conservation of Mass}}
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{{Navlinks|HS-PS1-6|HS-PS1-11|← HS-PS1-6|HS-PS1-11 →}}
 
{{learningstandard
 
{{learningstandard
 
| 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
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| ab = Assessment does not include complex chemical reactions.
 
| ab = Assessment does not include complex chemical reactions.
 
}}
 
}}
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== {{Assessmentheading}} ==
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{{assessmentmessage}}
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{| class="wikitable" style="width:100%; text-align:center"
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! style="padding: 0.5em 1.5em;" | Exam
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! style="padding: 0.5em 1.5em;" | Cluster
 +
! style="padding: 0.5em 1.5em;" | Question
 +
|-
 +
| rowspan="4" style="background-color:white;" | [[August 2026 Chemistry Exam|August 2026]]
 +
| 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:The Fruit Industry in New York State|The Fruit Industry in New York State]]
 +
| style="background-color:white;" | [[Questions:The Fruit Industry in New York State#q3|Question 8]]
 +
|-
 +
| style="background-color:white;" | [[Questions:The ABCs of Ultraviolet Radiation|The ABCs of Ultraviolet Radiation]]
 +
| style="background-color:white;" | [[Questions:The ABCs of Ultraviolet Radiation#q4|Question 29]]
 +
|-
 +
| style="background-color:white;" | [[Questions:Catalytic Converter in Cars|Catalytic Converter in Cars]]
 +
| style="background-color:white;" | [[Questions:Catalytic Converter in Cars#q2|Question 31]]
 +
|-
 +
| rowspan="4" style="background-color:white;" | [[June 2026 Chemistry Exam|June 2026]]
 +
| 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:The Accidental Development of Breathable, Waterproof Fabric|The Accidental Development of Breathable, Waterproof Fabric]]
 +
| style="background-color:white;" | [[Questions:The Accidental Development of Breathable, Waterproof Fabric#q1|Question 15]]
 +
|-
 +
| style="background-color:white;" | [[Questions:Balloon Arches|Balloon Arches]]
 +
| style="background-color:white;" | [[Questions:Balloon Arches#q2|Question 24]]
 +
|-
 +
| style="background-color:white;" | [[Questions:Chip Bag: PFAS vs PLA Plastics|Chip Bag: PFAS vs PLA Plastics]]
 +
| style="background-color:white;" | [[Questions:Chip Bag: PFAS vs PLA Plastics#q1|Question 33]]
 +
|-
 +
| rowspan="3" style="background-color:white;" | [[Chemistry sample question clusters|Sample clusters]] (Spring 2025)
 +
| 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:PSC A Profitable Blueberry Field|A Profitable Blueberry Field]]
 +
| style="background-color:white;" | [[Questions:PSC A Profitable Blueberry Field#q4|Question 4]]
 +
|-
 +
| style="background-color:white;" | [[Questions:PSC A Profitable Blueberry Field|A Profitable Blueberry Field]]
 +
| style="background-color:white;" | [[Questions:PSC A Profitable Blueberry Field#q5|Question 5]]
 +
|}
 +
 +
{{PerformanceLevel}}
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{{PLTable
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| Level5 = Create and revise mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction.
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| Level4 = Use mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction.
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| 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.
 +
| Level2 = Use or complete a mathematical representation to demonstrate that atoms and/or mass are conserved during a chemical reaction.
 +
| Level1 = Use information provided to identify mathematical representations that demonstrate atoms and/or mass are conserved during a chemical reaction.
 +
}}
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== Vocabulary ==
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Terms from the [[Chemistry Glossary]] that come from this standard or from the released exam questions that assess it.
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<div class="vocab-subhead">From this standard</div>
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<div class="vocab-list" style="column-width:14em;">
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* atom
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* chemical property
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* chemical reaction
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* claim
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* closed system
 +
* conservation of atoms
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* conservation of mass
 +
* conversion factor
 +
* element
 +
* energy
 +
* gas
 +
* macroscopic scale
 +
* mass
 +
* mathematical representation
 +
* matter
 +
* mole
 +
* particle
 +
* phenomenon
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* product
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* properties
 +
* proportional relationship
 +
* reactant
 +
* reaction
 +
* volume
 +
</div>
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<div class="vocab-subhead">From released exam questions</div>
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<div class="vocab-list" style="column-width:20em;">
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* [[Questions:The ABCs of Ultraviolet Radiation#q4|balanced equation]] – Aug 2026
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* [[Questions:Chip Bag: PFAS vs PLA Plastics#q1|bioplastic]] – June 2026
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* [[Questions:Chip Bag: PFAS vs PLA Plastics#q1|bond]] – June 2026
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* [[Questions:Electricity Generation in New York State#q3|climate change]] – Aug 2026
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* [[Questions:The Accidental Development of Breathable, Waterproof Fabric#q1|coefficient]] – June 2026
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* [[Questions:Catalytic Converter in Cars#q2|complete combustion]] – Aug 2026
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* [[Questions:Chemistry of Beverages#q1|concentration]] – June 2026
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* [[Questions:The Fruit Industry in New York State#q3|conservation of matter]] – Aug 2026, [[Questions:The Accidental Development of Breathable, Waterproof Fabric#q1|June 2026]]
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* [[Questions:Chip Bag: PFAS vs PLA Plastics#q1|criteria]] – June 2026
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* [[Questions:PSC A Profitable Blueberry Field#q5|evidence]] – Sample 2025
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* [[Questions:The Accidental Development of Breathable, Waterproof Fabric#q1|high temperature]] – June 2026
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* [[Questions:Chemistry of Beverages#q1|molar mass]] – June 2026
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* [[Questions:Chemistry of Beverages#q1|molecule]] – June 2026
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* [[Questions:Chip Bag: PFAS vs PLA Plastics#q1|monomer]] – June 2026
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* [[Questions:Smartphone Chemistry Sample Cluster#q3|oxide]] – Sample 2025
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* [[Questions:Chemistry of Beverages#q1|pressure]] – June 2026
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* [[Questions:Balloon Arches#q2|significant figures]] – June 2026, [[Questions:Smartphone Chemistry Sample Cluster#q3|Sample 2025]]
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* [[Questions:Chemistry of Beverages#q1|solution]] – June 2026
 +
* [[Questions:The Accidental Development of Breathable, Waterproof Fabric#q1|substance]] – June 2026, [[Questions:PSC A Profitable Blueberry Field#q4|Sample 2025]]
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* [[Questions:The Fruit Industry in New York State#q3|synthesis]] – Aug 2026
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* [[Questions:The Accidental Development of Breathable, Waterproof Fabric#q1|temperature]] – June 2026
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</div>
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<div class="vocab-subhead">Implied by this standard</div>
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<div class="vocab-list">
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* Avogadro’s number – implied by "the mole as the conversion from the atomic to the macroscopic scale"
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* molar volume (22.4 L/mol at STP) – implied by "calculate a quantity (e.g. # of particles, volume of a gas)"
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* mole ratio – the [[Questions:Smartphone Chemistry Sample Cluster#q3|Smartphone Chemistry]] rubric multiplies by "2 moles Al<sub>2</sub>O<sub>3</sub> / 4 moles Al".
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* stoichiometry – implied by "proportional relationships between masses of atoms in the reactants and the products"
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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.
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</div>
  
 
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{{Dimensionstable
 
{{Dimensionstable
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| SEP1 =  
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| SEP1 = Using Mathematics and Computational Thinking
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| DCI1 =  
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* Use mathematical representations of phenomena to support claims.
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| CC1 =  
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| DCI1 = PS1.B: Chemical Reactions
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* 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.
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| CC1 = Energy and Matter
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* The total amount of energy and matter in closed systems is conserved.
 
}}
 
}}
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| TOPIC = HS. Chemical Reactions
 
| TOPIC = HS. Chemical Reactions
 
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<metadesc>NYS Standard HS-PS1-7: Use mathematical representations to support the claim that atoms, and therefore mass, are conserved
 +
during a chemical reaction.</metadesc>

Latest revision as of 16:28, 27 September 2026

← HS-PS1-6
HS-PS1-11 →

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.

Assessment

What assessment of HS-PS1-7 might look like on a NY state exam.

Exam Cluster Question
August 2026 Electricity Generation in New York State Question 3
The Fruit Industry in New York State Question 8
The ABCs of Ultraviolet Radiation Question 29
Catalytic Converter in Cars Question 31
June 2026 Chemistry of Beverages Question 6
The Accidental Development of Breathable, Waterproof Fabric Question 15
Balloon Arches Question 24
Chip Bag: PFAS vs PLA Plastics Question 33
Sample clusters (Spring 2025) Smartphone Chemistry Question 3
A Profitable Blueberry Field Question 4
A Profitable Blueberry Field Question 5

Performance Level Descriptions

PLDs communicate the knowledge and skills expected of students to demonstrate proficiency in each Learning Standard. NYS assessments classify student performance into one of five levels.

☐
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
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.

Pixel beaver 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
Chemistry | HS. Chemical Reactions
Retrieved from "https://nyssls.info/index.php?title=HS-PS1-7&oldid=5712"

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