Suppose you live in new york. your grandparents live in colorado and
they want to call you on your birthday before they go to bed. they go to
sleep at 10: 00 pm. what is the latest your time you can expect to hear
from them?

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.