Topic 20 Why the Sun crosses our sky — what needs James (34)
28 question types · 6 lessons. Tap a button on each card; the ruling goes to the build and the card shows it as ruled.
Question types
Question types (28 to rule on) →
The lessons (6)
Each lesson in teaching order: its one-line summary, the article, the script and the quiz, then your ruling.
Topic 20 · Lesson 1 · Video / article words: 147 / 298 · Quiz items: 10 · Figures: 6
Lesson 1 Day on one side of Earth, night on the other
One half of Earth faces the Sun and has day, the other half faces away and has night; after half a turn the two places swap; the Sun never stops shining; Tamsin's "the Sun switches off" answered
Topic 20 · Lesson 2 · Video / article words: 150 / 384 · Quiz items: 10 · Figures: 6
Lesson 2 Why scientists use a model
Too big, too small, too slow to watch → a globe, a drawing, a computer program stand in; "model" coined in the frame; a flat map beats a photo for finding the way, so a model shows the part you are studying
Topic 20 · Lesson 3 · Video / article words: 150 / 345 · Quiz items: 10 · Figures: 7
Lesson 3 Show day and night with a globe and a lamp
The lamp, the globe and the sticker and what each stands for; turn from west to east: midday, evening, midnight, morning; one full turn is one day; the globe stays on its stand (a trip round the lamp is a year)
Topic 20 · Lesson 4 · Video / article words: 150 / 370 · Quiz items: 10 · Figures: 5
Lesson 4 Why the Sun seems to cross our sky
The merry-go-round; the town turns past a still Sun (sunrise in the east, midday, sunset in the west); the same path seen from the ground; Soren's claim recapped and contradicted
Topic 20 · Lesson 5 · Video / article words: 149 / 307 · Quiz items: 10 (1 order) · Figures: 8
Lesson 5 Why shadows change through the day
Grade 3's two light sentences; morning, midday and afternoon shadows drawn from the Sun's angle; the chain Earth turns → the Sun's place changes → the shadow changes; low Sun long shadow, high Sun short shadow
Topic 20 · Lesson 6 · Video / article words: 149 / 373 · Quiz items: 10 · Figures: 4
Lesson 6 Where the globe model gets it wrong
Seven features judged "Does the model get this right?" (shape, turning, land and sea right; size, surface, the hand, the lamp wrong); Soren's smooth Earth answered; every model is different from the real thing in some way
Skill: write-like-james @ 2d96464 · built 8 October 2026 by build_tools_needs_you.py