Get smart curated videos delivered to your inbox.   SUBSCRIBE
The Kid Should See This

Why Earth Has Two Levels

Watch more with these video collections:

Earth’s outer shell is made of two materials whose different densities and thicknesses give rise to two distinct “levels” on the planet’s surface.

And evidently these two materials—continental crust and more dense oceanic crust—have cute faces, as seen in the video above. How are mountain ranges made and why is continental crust four times thicker than the ocean crust? MinuteEarth describes this double-humped elevation distribution curve and more in Why Earth Has Two Levels.

Next: What is sea level? What counts as a mountain? And how was the Mariana Trench formed? Then watch more videos from MinuteEarth and try this experiment from San Francisco’s Exploratorium: Speed up geologic time with a DIY squeeze box.

This Webby award-winning video collection exists to help teachers, librarians, and families spark kid wonder and curiosity. TKSST features smarter, more meaningful content than what's usually served up by YouTube's algorithms, and amplifies the creators who make that content.

Curated, kid-friendly, independently-published. Support this mission by becoming a sustaining member today.