Formation of Planetary Systems

Above is a simplified representation of the formation of our solar system. Use this AND your drawn graphic with written descriptions to answer the questions that follow. What process led to the contraction of the stellar nebula? heat gravity collapse fragmentation What process preceded the current status and arrangement of our solar system? heat gravity collapse fragmentation Our planetary system all began in a cloud of gas and dust called a _? protoplanetary disk accretion disk stellar nebula planetisimals What process led to the intense amount of heat and energy creating a protostar? collapse condensation fragmentation nuclear fusion Order the events from the inital state to the final state in the formation of our planetary system. stellar nebula 1st accretion disk 2nd protoplanetary disk with a protostar 3rd protoplanets 5th planetisimals 4th the star, 8 planets, space debris 6th