The Earth’s chemical composition and evolution are topics that give rise to unanswered questions. However, some evident data involving Geology, Geophysics, and the climate change of our planet seem to imply a possible common explanation. Recently, several data coming from Geochemistry and Geomechanics have emphasized how tectonic activity is strictly correlated to the most important chemical composition changes in the Earth’s Crust over the last 4.5 Billion years (life time of our planet). At the same time, significant measurements of neutron emissions are observed at the Earth’s Crust scale during and before seismic events. On the other hand, at the laboratory scale, original experiments, performed on non-radioactive natural rocks under mechanical compression, have shown repeatable neutron emissions in correspondence to microcracking and macroscopic fracture. After these experiments, a considerable reduction in the Iron content appears to be consistently balanced by an equivalent increment in Al, Si, and Mg contents, as occurred at the planetary scale. In the same context, also the Calcium depletion can surprisingly explain the sudden appearance of water on our planet. The almost perfect ponderal balances between chemical compositions, before and after the major tectonic events, permit to exclude matter migration in favor of matter transformation of a nuclear origin. Summarizing, an overall decrement in ferrous elements (Fe, Ni) of 12% is totally balanced by consistent increments in silicon and aluminum (SI-AL) in the crust, and in carbon in the atmosphere. Analogously, an overall decrement in alcalyne-earth (or alcalyne-terrous) elements (Mg, Ca) of 8.7% is totally balanced by consistent increments in alcalyne elements (Na, K), and in oxygen.