= Geophysics
{wiki}
Geophysics applies <physics> and <mathematics> to the structure, composition, and evolution of <planets>, including <Earth>. It connects measurements with mechanisms: <plate tectonics> explains moving crust, the <geodynamo> explains a planetary <magnetic field>, and <albedo> connects reflected sunlight to a <planetary surface energy balance>. Even a small model can reveal a useful organizing principle, such as the competition between <ice-ocean albedo feedback> and stabilizing <thermal radiation>.
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