Question

figure 1 is a cartoon model depicting the solar nebular theory. according to the solar nebular theory, which sequence of events best describes the formation of the solar system? the collapse of a massive star followed by the condensation of gas and dust into planets. the collision of two galaxies resulting in the formation of a central star orbited by planets. the gravitational collapse of a rotating cloud of gas and dust, forming a flattened disk from which planets accrete. the explosion of a supernova leading to the dispersal of gas and dust, followed by the formation of planets.

Explanation:

The solar nebula theory posits that the solar - system formed from the gravitational collapse of a rotating cloud of gas and dust (a nebula). This cloud flattened into a disk, and planets accreted from the material in the disk. The other options do not align with the solar nebula theory. The collapse of a massive star is related to supernovae and not the initial formation of the solar - system in the context of the solar nebula theory. Galaxy collisions are on a much larger scale and not the mechanism for solar - system formation. Supernova explosions are not the starting point of solar - system formation according to the solar nebula theory.

Answer:

The gravitational collapse of a rotating cloud of gas and dust, forming a flattened disk from which planets accrete.