A Wonderleaf question
Why does it rain?
a real page from the book
Rain falls when water vapor cools into cloud droplets, those droplets join until they become heavy enough, and gravity pulls them down. The water first rose from oceans, lakes, puddles, and soil after sunlight warmed it into invisible vapor.
A cloud is not a bag waiting to spill; it is a huge gathering of tiny wet beads riding in air. Inside it, drops bump, merge, and grow, so the same water can visit a sea, a cloud, a sidewalk, and a river again.
Wonder words
- vapor
- droplets
- gravity
- evaporation
Try it out
Put a cold plate over a warm mug and watch droplets gather underneath like a tiny indoor cloud.
Read the whole picture book
Watercolour scenes, straight answers, about three minutes cover to cover.
Open the picture bookKeep wondering
- Why do mountains change the weather?
- Why is frost sparkly?
- Why is the sky sometimes gray?
- Why do clouds change shape?
- How do meteorologists predict the weather?
- Why does the air smell different after rain?
And the next question?
Ask anything — Wonderleaf writes and illustrates a picture book for it. That's the whole idea.
Ask your own question