Which answer choice means “formation”?

Which of the following classifications of star temperature is hottest? (2 points)

Which answer choice means “hard”?

Which of the following types of stars started out on the main sequence with the largest initial mass? (2 points)

Use the HR diagram below to answer the question. What can be concluded about the initial mass of a blue main sequence star compared to a red main sequence star? (2 points)

Which of the following is a massive star that has reached the end of its stellar evolution? (2 points)

When nuclear fusion begins, what can be said about the internal processes within that star? (2 points)

Which of the following types of stars is most likely to end up as a red supergiant? (2 points)

Which of the following is the most likely end for a star that formed from an extremely large nebula? (2 points)

Given the following images, choose the one that most likely represents an O-class star. (2 points)