Gina designed a model to show the steps in the nebular theory of formation of planetary systems. which of these diagrams best represents the second step of gina's model?
a.) condensation and contraction of cloud do to gravity

b.) rotation of cloud of gas and dust

c.) formation of planet

d.) fusion of gas and dust at the center to form the sun

B.) rotation of cloud of gas and dust

Explanation:

According to Nebular theory, the sun and the planets were formed from the Solar Nebula. Initially a fragment of the molecular cloud of dust and gases collapsed under its own weight. This contracted portion starts to rotate until a high enough temperature and pressure causes the nuclear fusion reaction in the core to start and form the Sun. The planets were formed from rest of the part of the cloud.

Thus, the second step of Gina's model should be B.) rotation of cloud of gas and dust .

explanation:

a fuel engine ( known as a gasoline engine in american english )is an internal combustion engine with spark ignition, designed to run on petrol (gasoline) and similar volatile fuels.