The Tropic of Cancer is the circle marking the latitude 23.5 degrees north, where the sun is directly overhead at noon on June 21, the beginning of summer in the northern hemisphere.
The Tropic of Cancer, is also referred to as the Northern Tropic.
The Tropic of Cancer's position is not fixed, but constantly changes because of a slight wobble in the Earth's longitudinal alignment relative to its orbit around the Sun.
Lithosphere is the solid outer part of the earth which includes the brittle upper portion of the crust and the mantle. It is bounded by the asthenosphere below and the atmosphere above.
<em><u>The pressure in the lithosphere is about 109 gigapascals or GPa. </u></em>
<em><u>Asthenosphere has a pressure of about 18 GPa</u></em>
<em><u>The mantle is a layer between the outer core and the crust, it has a pressure of about 149 GPa.</u></em>
