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World 3 · Moon Phases & Tides · 6 min · PRO

Waxing and waning

A 29.5-day cycle

PRO · Sun, Earth & Moon

World 3: Moon Phases & Tides is part of PRO

The first world of Sun, Earth & Moon is free. PRO opens the other 12 lessons in 3 worlds — simulations, quizzes and all.

  • Always half lit
  • When does the Moon rise?
  • Upside-down Moons and tides
  • Lining up
  • Why not every month?
PRO includes
  • All 26 labs — every world, every lesson
  • Practice exams and certificates

$8.33/mo, billed yearly ($99.99) · or $39.99 monthly

Unlock Sun, Earth & MoonTry the free world
← Always half litWhen does the Moon rise? →

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