12 pts The force responsible for bringing interstellar gas and dust together to form a star is __________________. Group of answer choices the electromagnetic force the strong nuclear force the weak nuclear force the gravitational force Flag question: Question 2 Question 22 pts As material falls onto the protostar from the surrounding accretion disk, it is thought that interactions between the magnetic fields of the rotating star and the accretion disk turn the in-falling material around and eject it from the stellar magnetic poles. This ejection is what we observe as _________________. Group of answer choices stellar jets a circumstellar disk a supernova planetary nebula Flag question: Question 3 Question 32 pts Once the core of the protostar reaches ___________________, atoms of hydrogen begin to fuse together and a star is born. Group of answer choices 1 million kelvin 10 million kelvin 15 million kelvin 100 million kelvin Flag question: Spacer Stars are powered by nuclear fusion in their cores. The production of new elements via nuclear reactions is called nucleosynthesis. A star's mass determines what other type of nucleosynthesis occurs in its core (or during explosive changes in its life cycle). Please watch the video below that explains how nuclear fusion powers stars, like our Sun. After watching the video, please go to --> Proton-Proton AnimationLinks to an external site. Flag question: Question 4