Alaska has the longest Coast blind in the United States traveling at 60 miles per hour how many hours would it take to travel along the Pacific coast blind in the United States traveling at 60 miles per hour how many hours would it take to travel along the Pacific coast

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.

a. themes: sub fields

answer is b.

explanation: