Origin of REPHAIM. Hebrew rÄphÄ'Ä«m. This word doesn't usually appear in our free dictionary, but the definition from our premium Unabridged Dictionary is offered here on a limited basis. Note that some information is displayed differently in the Unabridged.To access the complete Unabridged Dictionary, with an additional 300,000 words that aren't in our free dictionary, start a free trial.efinition of REPHAIM. : ancient giants reported in the Old Testament to have flourished in Canaan and its vicinity prior to the Hebrews. ADVERTISEMENT.
In this lesson, we're going to cover the thermosphere, the layer of atmosphere right before we get to outer space. To understand where the thermosphere is, we need to understand the other layers of the atmosphere starting from Earth's surface. Near the surface to about 7 miles above is the troposphere. This is where clouds we see in the sky are. Near the edge of the troposphere and into the next layer, the stratosphere, is where airplanes fly. The stratosphere extends from 7 miles above the surface to about 20 miles above the surface. After the stratosphere is the mesosphere, which extends upward to 50 miles above the surface. After the mesosphere, we have our focus layer for today, the thermosphere. The thermosphere extends from about 50 miles above the surface of Earth to about 600 miles above our planet. Beyond that is the exosphere, which is the layer that turns into outer space at the edge.
The atmospheric shell extending from the top of the mesosphere to outer space; it is a region of more or less steadily increasing temperature with height, starting at 40 to 50 miles (70 to 80 kilometers); the thermosphere includes, therefore, the exosphere and most or all of the ionosphere.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.