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Day 35 · A planet and its backgroundYear 2 Science · T1 W7–8 · Teacher · Teacher / Day 35

Child start: “Follow the named planet. Which background marks help you tell the change?”

Useful finish: A later-date relative-position caption. Prerequisite: Day 17 planet/background reference and Day 33 comparability. Prepare: Fixed named background markers J/K, planet token labelled “named planet; fictional schematic”, model date cards week 1/week 3/week 5. The token's identity is supplied; brightness is not identification. Opportunities: U01/I01/I04/I05/I06.

Complete model: Fictional schematic readings: week 1 planet above J; week 3 planet between J/K; week 5 planet below K. J/K remain fixed relative to each other in this model. A separately drawn horizon changes between pictures, so use the J/K relation for this question. No real astronomical coordinates, current planet location, equal movement speed or local sighting is supplied. Future week 7 position is not given.

Run:2 min child chooses position/background question;3 min compare week 1/week 3 only;7 min route;3 min ask what later record might help and why it stays unknown now. Extension: a tentative prediction stated before a separately supplied future card, if offered, must be retained before reveal; future actual visibility is not guaranteed.

Route1 — Pin the background: Child moves/directs the named token against J/K without moving them; makes an arrow labelled “change in this supplied sequence”, not speed. Route2 — Diagnose an ambiguous caption: Replace “it moved there” with object/reference/week words. Keep the changed horizon note but do not use it as a fixed reference. Route3 — Make a record request: Compose a short request for another later-date J/K record; it is a classroom draft, not a message sent to a real observatory.

Notice/next: Names the actual relation/ref/time span. If all motion is called same-day star grouping, put the two distinct question headings beside each other. B-later becomes eligible after this plus the later ordinary clarification on Day 36 if required. Home H05; C09–10; X05.

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Ordinary example C09 · Another example C10 · Home H05 · Project X05 · Read-aloud · Paper and picture aids · Sky Desk

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