People of European descent<span>
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Continental crust is 2.7-3.0
Oceanic crust is 3.0-3.3
Mantle is 3.3-5.7
Outer core is 9.9-12.2
Inner core is 12.6-13.0
The appropriate choice for the non-event is ...
... A. The costs of sewing machines began to increase.
_____
Interchangeable parts generally reduce costs and increase demand (and production).
4) Polaris
Stars emit light with energy generated by nuclear fusion, think of the Sun as an example. Polaris is a star, it's the brightest star in the little bear constellation, and therefore the correct answer.
Bering Strait is between North America (Alaska) and Asia - not South America.
The correct asnwer is: Central America: this includes such countries as Costa Rica, Nicaragua and Panama, together with the Panama Canal which allows ships to cross from the Atlantic to the Pacific. hope this helps
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