A Wonderleaf question
What makes the Grand Canyon so big?
a real page from the book
The Grand Canyon is so big because the Colorado River kept cutting while the Colorado Plateau rose, and erosion widened the opening afterward. River water carved downward through rock, while rain, ice, and falling debris broke the sides and carried loosened pieces away over millions of years.
Its size is also a stack of time you can see. Each colored layer marks an older world: seas, mudflats, dunes, and shorelines turned to stone. The canyon is not just a giant valley; it is a deep, bright record of ancient landscapes.
Wonder words
- erosion
- plateau
- canyon
- sediment
Try it out
Pour water over a small pile of dirt outside and watch where tiny channels form after each careful splash.
Read the whole picture book
Watercolour scenes, straight answers, about three minutes cover to cover.
Open the picture bookKeep wondering
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