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B-first · The park-frame archive · selected sourceYear 2 Science · T1 W7–8 · Assessment / B first source

Eligibility: After Days 33–34; same-place/turn model concepts explicitly familiar from 03–04.

Complete original fictional account

An original invented three-dot star pattern is shown intact in fixed ground-frame R. Early on a fictional evening it is above the low rail at the right; later it is above the centre; still later above the left edge. Record W uses a newly moved frame V and says only “above centre”; no relation of V to R is given. Separately a marked unshaded Earth disk is turned against a stationary facing guide by the fictional model maker. No real constellation, compass direction, speed, latitude or actual local sky observation is supplied.

Four questions

1. Tell the change in R using the notes.

2. Can W's word “centre” be compared directly with R? What is missing?

3. What is the turned disk trying to explain? What was actually done in the story?

4. Give a new recorder one useful instruction.

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