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tectonic plates
Continents
Neolithic Revolution.
A civilization exists in a mountain valley for several hundred years developing its own language in isolation from nearby civilizations such a civilization probably has been
- Protected from invasions by the mountains around it.
- Isolated by mountains or some other physical barriers.
- Offered a bigger supply of national resources, like the Aztecs.
Isolated by mountains or some other physical barriers.
I think the answer is thin; the crust is between 3 and 30 miles thick; less than 1% of the diameter of the Earth.
straits
vulnerable to attack from warring civilizations.
As the geology officer on an expedition to a newly discovered Earthlike planet, you might determine whether the planet has a crust composed of plates that move by chains of volcanoes along continental coastlines.
Farther from
Fields are left unprotected in the wind
Fields are left unplanted for several weeks
There are steep hillsides
~ All of the above
none the animals around them could be domesticated
Crust, Moho barrier, Mantle, Core
Most earthquakes occur where the edges of Earth's plates are.
