Earth & Sky Starters
Build fast intuition for sky geometry by connecting phases, eclipses, seasons, and apparent size in one coherent reasoning loop.
A short starter set for building intuition about sky geometry using a consistent predict→play→explain flow.
Instructions
Work through each exhibit in order. For each one: 1) Write a prediction in a sentence. 2) Do the play steps. 3) Write a 2–3 sentence explanation using evidence from what you observed.
Journey steps
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Moon Phases: Light, Not Shadow
RequiredExplain lunar phases as changing illumination geometry rather than Earth's shadow.
Use this first: it sets the ‘light, not shadow’ framing.
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Eclipse Geometry: Shadows in Space
RequiredRelate alignment and tilt to why eclipses are special events, not monthly events.
Connect phases to eclipse alignment and tilt.
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Seasons: Why Tilt Matters
RequiredUse Sun angle and day length evidence to reject the distance-causes-seasons misconception.
Reinforce sun angle vs distance misconceptions.
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Angular Size: The Sky’s Ruler
OptionalSeparate apparent size from physical size using distance-aware reasoning.
Optional extension: compare ‘looks big’ vs ‘is big’.
Why this sequence?
Why this sequence?
This sequence starts with the Moon because students can quickly observe illumination geometry, then extends that same geometric logic to eclipses and seasons before adding angular-size interpretation as an optional capstone.