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44 registry assets sequenced for kids learners. Each item keeps manual progress, source-grounded AI help gates, and visible content gaps.
Subject progression ladder
4 audience steps; 57 lessons across the ladder; 5 owner evidence items required.
kids
Current14 lessons; 1 variant; 1 locale.
/library/kids/chemistryNext audience route: /library/junior/chemistry
junior
12 lessons; 1 variant; 1 locale.
/library/junior/chemistryNext audience route: /library/learn/chemistry
learn
15 lessons; 1 variant; 1 locale.
/library/learn/chemistryNext audience route: /library/academy/chemistry
Local ladder gates
No local ladder gaps reported
Owner progression policy
5 owner evidence items required; 5 owner evidence gaps.
Progression claims
Progression readiness claim blocked
Local subject/audience ladder evidence only; owner curriculum placement, age appropriateness, localization quality, AI readiness, and production readiness are not proven.
Evidence gates
4 blockers; 15 owner evidence items required before readiness claims.
Local checks
12 local checks ready
47 quiz items; 47 answer keys; 47 explanations.
14 sitemap routes; 14 AI context routes; 0 candidate routes; no dead links.
Standards snapshot checked 2026-06-24
Owner evidence
Child/guardian review required
Owner evidence missing
Route owner evidence missing
Production evidence
Production evidence missing
Assessment telemetry evidence missing
Production discoverability evidence missing
Blockers: assessment_attempt_telemetry_required_before_readiness_claim, child_privacy_guardian_review_required, production_telemetry_evidence_required_before_readiness_claim
Source rights
14 lessons need rights review; 42 provenance blockers.
Source paths are locally ready for review
Owner rights clearance pending
Attribution clearance pending
AI provenance clearance pending
Rights and AI-provenance writes locked until owner evidence is present
Rights blockers: ai_provenance_policy_unresolved_without_license: 14, attribution_missing: 14, license_or_rights_policy_missing: 14
Local source-path and provenance evidence only; owner-approved license, attribution, and AI-provenance evidence are required before field writes, AI readiness, or publication claims.
Local report evidence only; this does not prove owner approval, guardian approval, live telemetry, release, deployment, or production readiness.
Production evidence rollup
14 lessons; 4 missing evidence categories; 42 evidence items required; 6 blockers.
Local contracts
4 local categories ready of 4 categories.
All local contracts ready
Missing evidence categories
assessment_telemetry, progress_telemetry, publication_rights, real_ai_eval
Review priority: high
Production review routes
First: /library/kids/chemistry/en/lesson/particle-model-intro
Last: /library/kids/chemistry/en/lesson/particles-in-three-states
AI context: /api/library/ai-help-context?slug=kids%2Fchemistry%2Fen%2Flesson%2Fparticle-model-intro
Safest next command
assessment_telemetry: 3 evidence items required. Command: node -e "const r=require('./docs/local-content-surface-map.json'); console.log(JSON.stringify(r.entries.filter(e=>e.surface==='/library/kids/chemistry').map(e=>({slug:e.slug,assessment_shape:e.assessment_shape,completion_criteria:e.completion_criteria,remediation_route:e.learning_loop.remediation_route})),null,2))"
assessment_telemetry: 3 evidence items required; local contract ready.
progress_telemetry: 4 evidence items required; local contract ready.
publication_rights: 6 evidence items required; local contract ready.
real_ai_eval: 29 evidence items required; local contract ready.
Production blockers: ai_provenance_policy_unresolved_without_license, assessment_attempt_telemetry_required_before_readiness_claim, attribution_missing, license_or_rights_policy_missing, production_telemetry_evidence_required_before_readiness_claim
local generated queue only; requires production telemetry, live RLS/ownership, Search Console/crawl, owner route policy, rights clearance, and real AI eval evidence before readiness claims
Publication rights review
14 lessons in surface; 14 lessons affected; 42 provenance blockers; 6 owner evidence items required.
Local review evidence
Source paths are locally ready for review
Review priority: highest
Owner evidence packets
ai_provenance_policy_unresolved_without_license: 14 affected lessons; 2 evidence items required.
attribution_missing: 14 affected lessons; 2 evidence items required.
license_or_rights_policy_missing: 14 affected lessons; 2 evidence items required.
Review routes
First: /library/kids/chemistry/en/lesson/particle-model-intro
Last: /library/kids/chemistry/en/lesson/particles-in-three-states
AI context: /api/library/ai-help-context?slug=kids%2Fchemistry%2Fen%2Flesson%2Fparticle-model-intro
Blocked claims
Publication readiness claim blocked
AI readiness claim blocked
Rights blockers: ai_provenance_policy_unresolved_without_license: 14, attribution_missing: 14, license_or_rights_policy_missing: 14
Local source-path and blocker evidence only; owner-approved license, attribution, AI-provenance policy, release, deployment, real AI eval, and publication readiness are not proven.
Telemetry evidence
47 quiz items; 14 progress signals; 3 assessment evidence items required; 4 progress evidence items required.
Assessment shape
47 quiz items; no missing answer keys; no missing explanations.
Assessment source contract ready
Progress loop
14 feedback paths; 14 review routes; 14 remediation routes; 14 manual advance gates.
Progress loop locally ready
Source contracts
14 local contract-only signals; 14 AI measurement signals.
Progress, AI transparency, and bridge contracts ready
Production evidence
Production assessment telemetry missing: 3 evidence items required.
Production progress telemetry missing: 4 evidence items required.
Telemetry blockers: assessment_attempt_telemetry_required_before_readiness_claim, production_telemetry_evidence_required_before_readiness_claim
Local assessment and progress source-contract evidence only; production telemetry samples, live RLS/ownership proof, mastery interpretation, release, deployment, and readiness are not proven.
AI eval review
14 lessons; 27 expected payload fields; 14 context routes; 14 grounding signals.
Payload coverage
14 source paths; 14 objective sets; 14 assessment signals; 14 completion criteria.
Local payload contract ready
Safety and measurement signals
14 privacy signals; 14 age guardrails; 14 measurement signals; 14 remediation policies.
Review priority: normal
Local eval contracts
API contract verifier ready
AI usage transparency verifier ready
Eval partnership source evidence ready
Eval readiness claims
AI eval readiness claim blocked
AI context: /api/library/ai-help-context?slug=kids%2Fchemistry%2Fen%2Flesson%2Fparticle-model-intro
AI eval blockers: real_ai_eval_required_before_production_readiness_claim
Local payload, transparency, and eval-partner source contracts only; real model transcripts, rubric scores, privacy review, production telemetry, release, deployment, and tutor readiness are not proven. Safest next command: node -e "const r=require('./docs/local-content-surface-map.json'); console.log(JSON.stringify(r.ai_context_payload_review_batches.map(b=>({surface:b.surface,ai_eval_partnership_local_evidence_ready:b.ai_eval_partnership_local_evidence_ready,real_ai_eval_evidence_present:b.real_ai_eval_evidence_present,blockers:b.review_blockers})),null,2))"
AI tutor handoff
14 AI-enabled lessons; 14 source-grounded contexts; 27 expected payload fields; 43 production evidence items required.
Context payload
14 context routes; 14 grounding paths; 14 privacy signals; 14 age guardrails; 14 measurement signals.
Payload, transparency, and eval-partner contracts are locally ready
Tutor learning loop
14 completion feedback paths; 14 review routes; 14 remediation routes; 14 manual advance gates.
Manual invocation required
Age, privacy, and safety
Child AI owner/guardian review required
Privacy summary ready; raw prompt/response summaries blocked
Child AI safety evidence missing
Real AI eval
Real AI eval evidence missing: 36 evidence items required.
AI tutor readiness claim blocked
AI tutor blockers: ai_provenance_policy_unresolved_without_license, assessment_attempt_telemetry_required_before_readiness_claim, attribution_missing
AI production evidence gaps: assessment_telemetry, progress_telemetry, publication_rights, real_ai_eval
Local AI tutor handoff evidence only; payload contracts, transparency checks, and source grounding do not prove real model quality, child AI approval, production telemetry, deployment, release, or production tutor readiness.
Curriculum sequence
1 sequence start; 1 sequence end; 13 previous links; 13 next links.
Backbone alignment
8 matched backbone lessons of 8; no backbone lessons missing; 6 extra local lessons.
Expanded or changed sequence needs owner policy
Manual control
14 manual advance gates; 14 auto-advance blocks.
Owner sequence policy
Owner sequence policy evidence missing: 4 evidence items required.
Policy: expanded local sequence requires owner policy
Sequence blockers: expanded_local_sequence_policy_required, authored_sequence_policy_required_before_curriculum_readiness_claim
Local route-link and backbone comparison only; owner-approved curriculum order, prerequisite policy, and production readiness are not proven.
Learner journey paths
14 resume routes; 14 review routes; 14 remediation routes; 13 next-step routes; 1 sequence end.
Completion
14 completion feedback paths; 14 manual completion gates.
Learner control
14 manual advance gates; 14 auto-advance blocks.
Manual advance remains required
Production gaps
4 production evidence categories missing; 42 evidence items required.
Local journey evidence only; production telemetry, owner route policy, publication rights, and real AI eval evidence are still required before readiness claims.
Media, characters, and citations
14 media scenes; 14 drills; 14 practice sets; 14 quizzes; 14 feedback paths.
Characters and citations
14 character paths; 14 citation paths; 14 concept maps; 14 source paths; 14 AI-grounded paths.
Character and citation source checks ready
Media control
14 manual advance gates; 14 auto-advance blocks.
Production media evidence missing
Age and safety
Child privacy surface
Guardian review evidence pending
Media blockers: ai_provenance_policy_evidence_required_before_readiness_claim, child_guardian_review_evidence_required_before_readiness_claim, child_privacy_guardian_review_required
Local media, character, citation, source-path, and manual-control evidence only; owner rights, guardian review, production telemetry, release, deployment, and production readiness are not proven.
Owner review handoff
10 local gates ready of 10; 13 owner evidence categories missing; 61 evidence items required.
Local gates
10 local gates ready of 10.
Owner evidence
13 owner evidence categories missing; 61 evidence items required.
Evidence categories: ai_provenance_policy, assessment_telemetry, child_guardian_review, companion_alignment
Claims and writes
Production readiness claim blocked
Owner-gated writes locked
Owner review blockers: ai_provenance_policy_evidence_required_before_readiness_claim, ai_provenance_policy_unresolved_without_license, assessment_attempt_telemetry_required_before_readiness_claim
Owner-review handoff evidence only; local gates and packet references do not prove owner approval, guardian approval, production telemetry, real AI eval, deployment, release, or production readiness.
Companion paths
2 manual companion paths are discoverable
2 required paths; 2 routes ready; 2 alignment gaps.
Owner alignment still required before readiness claims.
Companion blockers: story_sibling_content_alignment_review_required, flashcard_sibling_content_alignment_review_required
Companion owner alignment
14 lessons; 2 missing alignment types; 6 owner evidence items required.
Review priority: high
Route types
Ready route types: stories, flashcards
Companion targets
stories: /stories, /storybooks
flashcards: /learn/flashcards
Manual-choice review
Companion routes are locally discoverable.
Navigation from the lesson experience into companion content must stay learner-chosen and must not auto-advance assessments, media, payment, consent, or AI-uncertain flows
Owner alignment blockers: story_sibling_content_alignment_review_required, flashcard_sibling_content_alignment_review_required
flashcards
Route evidence is locally discoverable.
Alignment review required: 3 owner evidence items
Local route evidence only; per-lesson companion mapping and curriculum alignment still need owner review before readiness claims.
stories
Route evidence is locally discoverable.
Alignment review required: 3 owner evidence items
Local route evidence only; per-lesson companion mapping and curriculum alignment still need owner review before readiness claims.
library_subject_progress_summary
library_subject_progress_percentlibrary_subject_progress_local_only
All Matter Is Made of Tiny Particles Too Small to See
AI help: source-grounded
Before you start: Use with parent or guardian controls for child learners
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Gate: canonical_target_web_missing_uses_library_fallback
Bubbles, Color, and Heat Are Clues a Reaction Happened
AI help: source-grounded
Before you start: Complete or review All Matter Is Made of Tiny Particles Too Small to See
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Gate: canonical_target_web_missing_uses_library_fallback
Elements and the Periodic Table Basics
AI help: source-grounded
Before you start: Complete or review Bubbles, Color, and Heat Are Clues a Reaction Happened
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Everything Is Made of Tiny Particles
AI help: source-grounded
Before you start: Complete or review Elements and the Periodic Table Basics
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Gate: canonical_target_web_missing_uses_library_fallback
Exploring Crystals: Growing Salt Crystals
AI help: source-grounded
Before you start: Complete or review Everything Is Made of Tiny Particles
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Famous Chemist Characters and Their Discoveries
AI help: source-grounded
Before you start: Complete or review Exploring Crystals: Growing Salt Crystals
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Goggles On! How Careful Chemists Stay Safe
AI help: source-grounded
Before you start: Complete or review Famous Chemist Characters and Their Discoveries
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Gate: canonical_target_web_missing_uses_library_fallback
Heat and Cold: How Water Changes Shape
AI help: source-grounded
Before you start: Complete or review Goggles On! How Careful Chemists Stay Safe
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Gate: canonical_target_web_missing_uses_library_fallback
How Fire Works: Combustion Basics
AI help: source-grounded
Before you start: Complete or review Heat and Cold: How Water Changes Shape
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
How Plants Make Food: Photosynthesis Overview
AI help: source-grounded
Before you start: Complete or review How Fire Works: Combustion Basics
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
How Rust Forms: Understanding Oxidation
AI help: source-grounded
Before you start: Complete or review How Plants Make Food: Photosynthesis Overview
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
How Soap Works: Cleaning with Chemistry
AI help: source-grounded
Before you start: Complete or review How Rust Forms: Understanding Oxidation
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
How Things Dissolve: Solubility Explained
AI help: source-grounded
Before you start: Complete or review How Soap Works: Cleaning with Chemistry
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
How We Measure Matter: Mass and Volume
AI help: source-grounded
Before you start: Complete or review How Things Dissolve: Solubility Explained
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Introduction to Acids and Bases with Everyday Items
AI help: source-grounded
Before you start: Complete or review How We Measure Matter: Mass and Volume
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Introduction to Atoms: The Building Blocks
AI help: source-grounded
Before you start: Complete or review Introduction to Acids and Bases with Everyday Items
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Introduction to Metals and Nonmetals
AI help: source-grounded
Before you start: Complete or review Introduction to Atoms: The Building Blocks
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Introduction to pH Scale with Colorful Experiments
AI help: source-grounded
Before you start: Complete or review Introduction to Metals and Nonmetals
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Introduction to Polymers: What is Plastic?
AI help: source-grounded
Before you start: Complete or review Introduction to pH Scale with Colorful Experiments
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Magnetism and Chemistry: What is a Magnet?
AI help: source-grounded
Before you start: Complete or review Introduction to Polymers: What is Plastic?
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Mass Stays the Same When Ice Melts or Sugar Dissolves
AI help: source-grounded
Before you start: Complete or review Magnetism and Chemistry: What is a Magnet?
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Gate: canonical_target_web_missing_uses_library_fallback
Mixtures and Solutions: What’s the Difference?
AI help: source-grounded
Before you start: Complete or review Mass Stays the Same When Ice Melts or Sugar Dissolves
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Mixtures Have Parts You Can Separate Back Out
AI help: source-grounded
Before you start: Complete or review Mixtures and Solutions: What’s the Difference?
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Gate: canonical_target_web_missing_uses_library_fallback
Physical Changes vs Chemical Changes
AI help: source-grounded
Before you start: Complete or review Mixtures Have Parts You Can Separate Back Out
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Physical vs. Chemical Changes: Same Stuff or New Stuff?
AI help: source-grounded
Before you start: Complete or review Physical Changes vs Chemical Changes
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Gate: canonical_target_web_missing_uses_library_fallback
Properties of Matter: Texture, Color, and Shape
AI help: source-grounded
Before you start: Complete or review Physical vs. Chemical Changes: Same Stuff or New Stuff?
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Recycling and Chemistry: How Materials Change
AI help: source-grounded
Before you start: Complete or review Properties of Matter: Texture, Color, and Shape
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Same Stuff or Brand-New Stuff? Two Kinds of Change
AI help: source-grounded
Before you start: Complete or review Recycling and Chemistry: How Materials Change
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Gate: canonical_target_web_missing_uses_library_fallback
Sieves, Magnets, and Filters: Separating Mixtures
AI help: source-grounded
Before you start: Complete or review Same Stuff or Brand-New Stuff? Two Kinds of Change
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Gate: canonical_target_web_missing_uses_library_fallback
Simple Chemical Reactions: Baking Soda and Vinegar
AI help: source-grounded
Before you start: Complete or review Sieves, Magnets, and Filters: Separating Mixtures
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Simple Laboratory Tools and Safety Rules
AI help: source-grounded
Before you start: Complete or review Simple Chemical Reactions: Baking Soda and Vinegar
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
States of Matter: Solids, Liquids, and Gases
AI help: source-grounded
Before you start: Complete or review Simple Laboratory Tools and Safety Rules
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
States of Matter: Solids, Liquids, and Gases
AI help: source-grounded
Before you start: Complete or review States of Matter: Solids, Liquids, and Gases
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
States of Water: Ice, Water, and Steam Experiments
AI help: source-grounded
Before you start: Complete or review States of Matter: Solids, Liquids, and Gases
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
The Role of Air: What is Oxygen and Carbon Dioxide?
AI help: source-grounded
Before you start: Complete or review States of Water: Ice, Water, and Steam Experiments
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Tiny Particles: Why Some Things Are Hard, Drippy, or Airy
AI help: source-grounded
Before you start: Complete or review The Role of Air: What is Oxygen and Carbon Dioxide?
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Gate: canonical_target_web_missing_uses_library_fallback
Using Indicators to Test Acids and Bases
AI help: source-grounded
Before you start: Complete or review Tiny Particles: Why Some Things Are Hard, Drippy, or Airy
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Water Cycle and Its States
AI help: source-grounded
Before you start: Complete or review Using Indicators to Test Acids and Bases
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
What is Matter?
AI help: source-grounded
Before you start: Complete or review Water Cycle and Its States
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Where Did the Sugar Go?
AI help: source-grounded
Before you start: Complete or review What is Matter?
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Gate: canonical_target_web_missing_uses_library_fallback
Why Do Things Change Color? Chemical Indicators
AI help: source-grounded
Before you start: Complete or review Where Did the Sugar Go?
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Why Do Things Float or Sink? Density Basics
AI help: source-grounded
Before you start: Complete or review Why Do Things Change Color? Chemical Indicators
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Why Only So Much Sugar Will Dissolve in Water
AI help: source-grounded
Before you start: Complete or review Why Do Things Float or Sink? Density Basics
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 1 next-step path, and 4 completion criteria are mapped for this lesson.
Gate: canonical_target_web_missing_uses_library_fallback
Why Solids Hold Shape but Gases Spread Out
AI help: source-grounded
Before you start: Complete or review Why Only So Much Sugar Will Dissolve in Water
To finish: Review objectives and instruction
What happens next
1 review path, 1 remediation path, 0 next-step paths, and 4 completion criteria are mapped for this lesson.
Gate: canonical_target_web_missing_uses_library_fallback