Microscopes are used to study the structures of rocks. over time, microscopes have become more and more powerful. as a result of this technological improvement, our structural information of rocks a) now includs fewer minerals. b) has become increasingly detailed. c) has become increasingly debatable. d) now includes the location of electrons.

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.