Maddox is a mainly male name in use in English speaking countries derived from a Welsh surname meaning son of Madoc..Madoc or Madog was a legendary Welsh prince who in Welsh folklore sailed to the New World three hundred years before Christopher Columbus.addox is a mainly male name in use in English speaking countries derived from a Welsh surname meaning son of Madoc..
The thermosphere is the layer of the Earth's atmosphere directly above the mesosphere and directly below the exosphere.adiation causes the atmosphere particles in this layer to become electrically charged (see ionosphere), enabling radio waves to bounce off and be received beyond the horizon. In the exosphere, beginning at 500 to 1,000 kilometres (310 to 620 mi) above the Earth's surface, the atmosphere turns into space.
The thermosphere is characterized by a positive temperature gradient, which is equal to zero at the mesopause, has a maximum value between 100 and 200 km, and again becomes equal to zero near the base of the exosphere, where the atmosphere becomes practically isothermal.he layer of the upper atmosphere located between the mesopauseâthat is, the upper boundary of the mesosphereâand the base of the exosphere. On the average, the thermosphere extends from a height of about 80 km to a height of about 500 km; these limits vary by Â±10â20 percent.