RS4K Book 5 — Chemistry (Ch 2–5): Grade 5 atoms-first chapters. Foundation 100%, Gap 0.0%, Map Error 0.0%, Practices 93%, no FSEs. Matter, periodic table, bonding, and reactions all built from atoms and electrons; conservation of matter as atom rearrangement. Recommended Deep.
| Program | RS4K - Science Book 5 — Chemistry |
| Unit | Ch 2–5: What Is Chemistry? | What Is Matter? | Chemical Bonding | Chemical Reactions |
| Publisher | Gravitas Publications Inc. |
| Year | 2024 |
| Grade Band | Grade 5 (3-5 calibration applied) |
RS4K Book 5 Chemistry scores Foundation 100%. 15 passages extracted, all mechanism, all atomically grounded. Zero map errors. Zero confirmed FSEs.
Pure atoms-first chemistry. Matter is introduced as atoms; the periodic table organizes elements by atomic number; bonding (covalent and ionic) is explained through electron sharing and transfer; chemical reactions are framed as atoms rearranging, with conservation of matter stated as atoms neither created nor destroyed.
“Democritus called this smallest piece of matter the atom. Today we know that atoms make all matter.” (Ch2, p.15)
“Atoms are made of even smaller particles called protons, neutrons, and electrons. Protons and neutrons combine to form the nucleus.” (Ch3, p.22)
“A bond with shared electrons is a covalent bond.” (Ch4, p.36) “A bond with unshared electrons is an ionic bond.” (Ch4, p.37)
“Atoms are neither created nor destroyed in a chemical reaction — the atoms are just rearranged into different combinations.” (Ch5, p.41)
Practices: 93% (green). 6 PRESENT, 1 PARTIAL. Ch4 ‘Planet Atomis’ atom/molecule model build with iterative design cycle; Ch1 measurement lab; Ch5 reactions activity. Argument from evidence PARTIAL (model Q&A but no formal debate).
Nothing structural.
| Total Passages Scored | 15 |
| Raw Gap Error | 0.0% (all 15 mechanism passages name atoms, electrons, or molecules) FALSE = atoms/molecules not present before students are asked to explain. The student is navigating without a starting point. |
| Adjusted Gap Error | 0.0% UNSCAFFOLDED = no atomic grounding at all. LESSON_ATOMS = atoms mentioned elsewhere in lesson but not connected to this concept. |
| Substance-Model Errors (REI) | 0 Curriculum treats a process or outcome as a substance - "heat flows," "energy is stored," "electricity flows like water." Student builds a substance ontology. |
| Label-as-Explanation (LAE) | 0 Curriculum provides a name and treats it as an explanation - "this happens because of gravity." Student believes knowing the name IS understanding the concept. |
| Vague-Entity Errors (AEC) | 0 Curriculum uses vague entities ("tiny particles," "building blocks") without specifying atoms or molecules. Student invents their own model with macroscopic properties. |
| Factual Science Errors (FSE) | 0 Statements that are scientifically incorrect - not imprecise framing, but wrong. Any confirmed FSE = Not Recommended. |
| Practices | 93% - Deep Seven practices scored PRESENT, PARTIAL, or ABSENT and averaged: asking questions, developing and using models, planning and carrying out investigations, analyzing and interpreting data, using mathematics, constructing explanations and designing solutions, and argument from evidence. Higher is better, the opposite direction from gap and map errors. Reported but not part of the Foundation Score or the verdict. |
Pure atoms-first chemistry. Matter, the periodic table, bonding, and reactions are all built from atoms and electrons; conservation of matter is framed as atom rearrangement. Zero gap, zero ontological errors.
Dalton→Thomson→Bohr→quantum model progression taught at Grade 5. Covalent and ionic bonds distinguished by electron behavior. Conservation of matter as atom rearrangement.
Recommended (Deep) — Deep by design -
Evidence for every entry is published at three levels. Each level states what it contains and what it leaves out.
Scores, verdict, and the full pattern count for this unit are above: adjusted gap, REI / LAE / AEC counts, FSE status, and the seven-practice score. Passage-level detail for this unit is carried in the downloadable evidence file.
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