Why does the Sun seem to cross the sky, and why do shadows move? Read the clues and open all four locks to discover how Earth's spin makes day, night, and shadows.
The Sun looks like it moves across the sky, but it's really Earth spinning that makes day, night, and moving shadows. Earth rotates once about every 24 hours. Tap each clue, then open all four locks!
Tap each clue to read it. You can open them again anytime.
Use the clues to open each lock.
You figured out that Earth's spin — not the Sun moving — makes day and night, and moves shadows from long to short and back. Earth rotates once about every 24 hours, and that changes everything we see in the sky!