This packet is everything a parent or guide needs to assess Unit 01 at home — the learning targets, the answers that count as correct, the mastery rubric, calibration examples, and a clipboard score sheet. No multiple-choice test: the student shows mastery by observing the real sky and reasoning from sky geometry aloud.
By the end of The Sky & Celestial Motion unit, a student should be able to:
Six criteria, each judged Not yet / Approaching / Mastered (Page 3).
Real sky sessions with binoculars, telescope, and star charts.
The student reasons from sky geometry aloud (Page 4 anchors).
Dated, sketched entries kept across weeks, not filled in for a quiz.
You are making a decision, not adding up points. For each criterion, decide whether the work is Not yet, Approaching, or Mastered — the column language tells you which. A criterion counts as mastered only when the student can both make the observation and justify the sky geometry behind it. A student carries three tokens per term; one token buys a re-do of one criterion on another night, so a single clouded-out evening never sinks the unit.
Accept any answer in the synonyms column — they are pre-approved as equivalent. The third column flags the confusions that look close but are not yet, so you can coach precisely.
| Canonical answer | Accepted synonyms | Common confusion / discriminator |
|---|---|---|
| The sky & star charts | ||
| Planisphere | star wheel; star chart | Set to the date and hour to show what is up right now |
| Constellation | star pattern | One of 88 official sky regions; an asterism is an informal pattern |
| Celestial sphere | dome of the sky | Apparent only; the motion is Earth’s, not the sphere’s |
| Zenith | point straight overhead | Altitude 90°; the opposite point is the nadir |
| Celestial coordinates | ||
| Altitude | angle above the horizon | 0° at the horizon, 90° at the zenith |
| Azimuth | compass bearing | Measured around from due north through east |
| Right ascension | celestial longitude; RA | Fixed to the stars, measured in hours — not altitude/azimuth |
| Declination | celestial latitude; Dec | Degrees north or south of the celestial equator |
| Motion, Moon & seasons | ||
| Diurnal motion | nightly rising and setting | Comes from Earth’s rotation, not the stars themselves moving |
| Axial tilt | 23.5° tilt; obliquity | Causes the seasons — not Earth’s distance from the Sun |
| Moon phases | waxing / waning cycle | From Sun–Earth–Moon geometry, not Earth’s shadow |
| Maria | lunar “seas” | Dark basalt plains; the bright cratered areas are highlands |
| Criterion | Not yet | Approaching | Mastered |
|---|---|---|---|
| Naked-eye observation & star charts | Cannot orient a star chart or find a named constellation in the real sky. | Finds bright objects but fumbles the planisphere or loses track of direction. | Sets a planisphere for the date and hour, then locates constellations, bright stars, and visible planets by eye. |
| The celestial sphere & coordinates | Treats the sky as flat and cannot describe where an object sits. | Uses altitude and azimuth loosely but confuses the two or their zero points. | Fixes any object by altitude and azimuth and explains how right ascension and declination map the celestial sphere. |
| Diurnal & annual motion | Thinks the stars are fixed and that seasons come from Earth’s distance to the Sun. | Describes nightly rising and setting but muddles why constellations change with the seasons. | Explains diurnal motion from Earth’s rotation and the seasonal march of constellations — and traces the seasons to axial tilt, not distance. |
| Moon phases & lunar features | Believes Earth’s shadow causes the phases. | Names the phases in order but cannot draw the Sun–Earth–Moon geometry that makes them. | Predicts the phase from the Sun–Earth–Moon geometry and identifies maria, highlands, and major craters. |
| Observation technique & the journal | Skips setup, uses white light at the eyepiece, or leaves the journal blank. | Observes with binoculars or a telescope but keeps thin, undated notes. | Works cleanly under a red flashlight, uses binoculars, telescope, and sky-mapping apps well, and keeps dated, sketched journal entries across weeks. |
| Integration (cross-domain) | Treats the science as isolated facts. | Names a link to history, reading, or writing but cannot defend it. | Connects the unit across History · Reading · Writing and defends why it matters. |
Work down the criteria one at a time. Ask the student to reason it out rather than recall — “why is it warm in July?” The cause (axial tilt, not distance) is where Approaching and Mastered separate. Naming a phase is Approaching; explaining the Sun–Earth–Moon geometry that makes it is Mastered.
Read these before you grade. They show what Mastered and Not yet actually sound like, plus the edge cases where you should coach rather than decide on the spot.
Student: ______________________________________ Date: _______________ Guide: _________________________
| # | Criterion | Decision | Notes |
|---|---|---|---|
| 1 | Naked-eye observation & star charts | NY / Appr / Mast | |
| 2 | The celestial sphere & coordinates | NY / Appr / Mast | |
| 3 | Diurnal & annual motion | NY / Appr / Mast | |
| 4 | Moon phases & lunar features | NY / Appr / Mast | |
| 5 | Observation technique & the journal | NY / Appr / Mast | |
| 6 | Integration (cross-domain) | NY / Appr / Mast |
☐ No ☐ Yes — for criterion: __________ Tokens remaining: ☐ 3 ☐ 2 ☐ 1 ☐ 0
NY = Not yet · Appr = Approaching · Mast = Mastered · Unsure between two levels? Circle the lower one and note what a re-do would need.