RS4K Book 5 — Physics (Ch 10–13): Grade 5 atoms-first chapters. Foundation 100%, Gap 0.0%, Map Error 0.0%, Practices 93%, no FSEs. Energy explicitly as measurement of change, not substance. Force as atomic contact. Friction as atomic handshakes. Full battery/flashlight atomic-level walkthrough. Recommended Deep.
| Program | RS4K - Science Book 5 — Physics |
| Unit | Ch 10–13: What Is Physics? | Force and Work | What Is Energy? | Conservation of Energy |
| Publisher | Gravitas Publications Inc. |
| Year | 2024 |
| Grade Band | Grade 5 (3-5 calibration applied) |
RS4K Book 5 Physics scores Foundation 100%. 14 passages (9 mechanism, 5 observational), all mechanism passages atomically grounded. Zero map errors — the anti-REI framing is the clearest in any K–8 curriculum evaluated. Zero confirmed FSEs.
Force is defined as atomic contact; friction as atomic “handshakes” (temporary bonds). Energy is explicitly defined as a measurement of change, not a substance. Conservation of energy is explained as energy scores tracking position and motion changes simultaneously, not as energy stuff being converted. Full atomic-level mechanism for a battery powering a flashlight.
“The atoms of your shoe transfer this fast motion to the atoms of the ball … This action of transferring motion from atom to atom is called a contact force.” (Ch11, p.101)
“The atoms on the surface of the grass make tiny little handshakes (temporary bonds) with the atoms on the surface of the ball … all of these little handshakes create a force called friction.” (Ch11, p.101)
“Energy is not an object you can put in your pocket or transfer, convert, or use. Instead, energy is the outcome of changes.” (Ch12, p.105)
“No energy substance flowed through the wire. What actually happened is a chain of actions: forces inside the battery nudged electrons, those electrons nudged the next electrons along the wire.” (Ch13, p.115)
Practices: 93% (green). 6 PRESENT, 1 PARTIAL. Ch11 ‘Mighty Motion’ forces lab; Ch12 ‘Great Park-Cleanup’ Rube Goldberg design problem; W=F×d and GPE=mgh calculations. Argument from evidence PARTIAL (design justification but no formal debate).
Nothing structural.
| Total Passages Scored | 14 |
| Raw Gap Error | 0.0% 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. |
The physics chapters are the strongest anti-reification material in the book. Energy is taught explicitly as a measurement of change, not a substance; conservation, electricity, and dissipation are all narrated as atoms and electrons interacting. Force is defined as an action, not a possession.
Energy-as-measurement framing with explicit anti-REI inoculation. Atomic-level battery/flashlight mechanism. Friction as temporary atomic bonds. W=F×d and GPE=mgh at Grade 5. Rube Goldberg design problem.
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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