Difference between revisions of "HS-LS2-3"
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{{Navlinks|HS-LS2-8|HS-LS2-4|← HS-LS2-8|HS-LS2-4 →}} | {{Navlinks|HS-LS2-8|HS-LS2-4|← HS-LS2-8|HS-LS2-4 →}} | ||
{{learningstandard | {{learningstandard | ||
| + | | topic = Matter and Energy in Ecosystems | ||
| ls = Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in | | ls = Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in | ||
ecosystems. | ecosystems. | ||
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| − | | rowspan="2" style="background-color:white;" | [[August 2026 Life Science: Biology Exam|August 2026]] | + | | rowspan="2" style="background-color:white;" | [[August 2026 Life Science: Biology Exam|August 2026 Biology Regents]] |
| style="background-color:white;" | [[Questions:Deep-Sea Dilemmas|Deep-Sea Dilemmas]] | | style="background-color:white;" | [[Questions:Deep-Sea Dilemmas|Deep-Sea Dilemmas]] | ||
| style="background-color:white;" | [[Questions:Deep-Sea Dilemmas#q2|Question 6]] | | style="background-color:white;" | [[Questions:Deep-Sea Dilemmas#q2|Question 6]] | ||
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| style="background-color:white;" | [[Questions:Homeostasis in Plants#q4|Question 33]] | | style="background-color:white;" | [[Questions:Homeostasis in Plants#q4|Question 33]] | ||
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| − | | rowspan="3" style="background-color:white;" | [[June 2026 Life Science: Biology Exam|June 2026]] | + | | rowspan="3" style="background-color:white;" | [[June 2026 Life Science: Biology Exam|June 2026 Biology Regents]] |
| style="background-color:white;" | [[Questions:Buzzy Bees|Buzzy Bees]] | | style="background-color:white;" | [[Questions:Buzzy Bees|Buzzy Bees]] | ||
| style="background-color:white;" | [[Questions:Buzzy Bees#q1|Question 28]] | | style="background-color:white;" | [[Questions:Buzzy Bees#q1|Question 28]] | ||
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| style="background-color:white;" | [[Questions:The Forest Gardener#q5|Question 37]] | | style="background-color:white;" | [[Questions:The Forest Gardener#q5|Question 37]] | ||
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| − | | style="background-color:white;" | [[January 2026 Life Science: Biology Exam|January 2026]] | + | | style="background-color:white;" | [[January 2026 Life Science: Biology Exam|January 2026 Biology Regents]] |
| style="background-color:white;" | [[Questions:Purple Insect Eater|Purple Insect Eater]] | | style="background-color:white;" | [[Questions:Purple Insect Eater|Purple Insect Eater]] | ||
| style="background-color:white;" | [[Questions:Purple Insect Eater#q3|Question 39]] | | style="background-color:white;" | [[Questions:Purple Insect Eater#q3|Question 39]] | ||
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| − | | style="background-color:white;" | [[June 2025 Life Science: Biology Exam|June 2025]] | + | | style="background-color:white;" | [[June 2025 Life Science: Biology Exam|June 2025 Biology Regents]] |
| style="background-color:white;" | [[Questions:Does It Matter?|Does It Matter?]] | | style="background-color:white;" | [[Questions:Does It Matter?|Does It Matter?]] | ||
| style="background-color:white;" | [[Questions:Does It Matter?#q2|Question 34]] | | style="background-color:white;" | [[Questions:Does It Matter?#q2|Question 34]] | ||
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== Vocabulary == | == Vocabulary == | ||
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* [[Questions:Does It Matter?#q2|waste]] – June 2025 | * [[Questions:Does It Matter?#q2|waste]] – June 2025 | ||
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| + | {{PerformanceLevel}} | ||
| + | {{PLTable | ||
| + | | Level5 = Construct and revise an explanation, based on evidence obtained from a variety of reliable sources, for the cycling of matter and flow of energy in ecosystems. | ||
| + | | Level4 = Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in ecosystems. | ||
| + | | Level3 = Construct or revise an explanation based on evidence for the cycling of matter and/or flow of energy in ecosystems related to photosynthesis and/or cellular respiration. | ||
| + | | Example3 = <span class="pld-chip pld-chip-bio">[[Questions:The Forest Gardener#q1|June 2026 · Q33]]</span> <span class="pld-chip pld-chip-bio">[[Questions:Does It Matter?#q2|June 2025 · Q34]]</span> | ||
| + | | Level2 = Support a given explanation by providing/identifying evidence for the cycling of matter and/or flow of energy in ecosystems related to photosynthesis and/or cellular respiration. | ||
| + | | Example2 = <span class="pld-chip pld-chip-bio">[[Questions:Buzzy Bees#q1|June 2026 · Q28]]</span> <span class="pld-chip pld-chip-bio">[[Questions:Purple Insect Eater#q3|Jan 2026 · Q39]]</span> | ||
| + | | Level1 = Identify the explanation or evidence, from those provided, for the cycling of matter and/or flow of energy in ecosystems related to photosynthesis and/or cellular respiration. | ||
| + | | Example1 = <span class="pld-chip pld-chip-bio">[[Questions:Deep-Sea Dilemmas#q2|Aug 2026 · Q6]]</span> <span class="pld-chip pld-chip-bio">[[Questions:Homeostasis in Plants#q4|Aug 2026 · Q33]]</span> <span class="pld-chip pld-chip-bio">[[Questions:The Forest Gardener#q5|June 2026 · Q37]]</span> | ||
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== {{Resourcesheading}} == | == {{Resourcesheading}} == | ||
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| TOPIC = HS. Matter and Energy in Organisms and Ecosystems | | TOPIC = HS. Matter and Energy in Organisms and Ecosystems | ||
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Latest revision as of 09:46, 18 October 2026
Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in ecosystems.
Clarification statement: Emphasis is on conceptual understanding of the role of aerobic and anaerobic respiration and photosynthesis within ecosystems.
Assessment boundary: Assessment does not include the specific chemical processes of aerobic respiration, anaerobic respiration, and photosynthesis.
Regents Exam Questions
Released New York State Regents exam questions that assess HS-LS2-3 are listed here by exam and question cluster. Each link opens the question with its answer key.
Vocabulary
Terms from the Biology Glossary that come from this standard or from the released exam questions that assess it.
From this standard
- aerobic respiration
- anaerobic respiration
- cellular respiration
- chemical process
- cycling of matter
- ecosystem
- energy transfer
- flow of energy
- investigation
- life processes
- matter
- matter cycle
- photosynthesis
From released exam questions
- acid rain – Jan 2026
- atmosphere – Aug 2026, June 2026, June 2025
- bacteria – Aug 2026, June 2025
- biodiversity – June 2026
- carbon – June 2026, Jan 2026, June 2025
- chemosynthesis – Aug 2026
- claim – June 2026, Jan 2026
- colony – June 2026
- combustion – Jan 2026
- cycling of carbon – June 2026
- decomposition – June 2025
- ecosystem services – June 2026
- endangered species – June 2026
- energy flow – Aug 2026
- enzyme – Jan 2026
- fertilization – June 2026
- fertilizer – June 2025
- flowering plant – June 2026
- group behavior – June 2026
- habitat destruction – June 2026
- human activity – June 2026
- hunting – June 2026
- hydrogen – Aug 2026
- mammal – June 2026
- nitrogen – Jan 2026
- nutrient cycling – June 2026
- ocean – Aug 2026
- ovary – June 2026
- ovule – June 2026
- poaching – June 2026
- pollen grain – June 2026
- pollination – June 2026
- pollinator – June 2026
- population – June 2026
- protein – Jan 2026
- rainforest – June 2026
- regeneration – June 2026
- reintroduction – June 2026
- reproductive rate – June 2026
- seed dispersal – June 2026
- social insect – June 2026
- soil – Jan 2026, June 2025
- species – June 2026
- stigma – June 2026
- sugar – Aug 2026
- trend – June 2026
- waste – June 2025
Performance Level Descriptions
Every Regents exam question on HS-LS2-3 is written to match one of the performance level descriptions (PLDs) below.
Level 1: Identify the explanation or evidence, from those provided, for the cycling of matter and/or flow of energy in ecosystems related to photosynthesis and/or cellular respiration. Aug 2026 · Q6 Aug 2026 · Q33 June 2026 · Q37
Level 2: Support a given explanation by providing/identifying evidence for the cycling of matter and/or flow of energy in ecosystems related to photosynthesis and/or cellular respiration. June 2026 · Q28 Jan 2026 · Q39
Level 3: Construct or revise an explanation based on evidence for the cycling of matter and/or flow of energy in ecosystems related to photosynthesis and/or cellular respiration. June 2026 · Q33 June 2025 · Q34
Level 4: Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in ecosystems.
Level 5: Construct and revise an explanation, based on evidence obtained from a variety of reliable sources, for the cycling of matter and flow of energy in ecosystems.
Resources
Examples and discussion of resources for the learning, teaching, and assessment of HS-LS2-3.
This section could be expanded upon. You can help out by adding to this section.
NGSS Dimensions
Performance expectation HS-LS2-3 was developed using the following elements from the NRC document A Framework for K-12 Science Education:
Science and Engineering Practices
- Constructing Explanations and Designing Solutions
- Construct and revise an explanation based on valid and reliable evidence obtained from a variety of sources (including students' own investigations, models, theories, simulations, peer review) and the assumption that theories and laws that describe the natural world operate today as they did in the past and will continue to do so in the future.
Disciplinary Core Ideas
- LS2.B: Cycles of Matter and Energy Transfer in Ecosystems
- Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes.
Crosscutting Concepts
- Energy and Matter
- Energy drives the circulation of matter within and between systems.
Page contributors: Conrad Richman, Caroline Leonard