Exam 17: Star Stuff

An H-R diagram for a globular cluster will show a horizontal branch-a line of stars above the main-sequence but to the left of the subgiants and red giants.Which of the following statements about these horizontal branch stars is true?

Which of the following statements about degeneracy pressure is not true?

This diagram represents the life track of a 1-solar-mass star.Refer to the life stages labeled with Roman numerals. -During which stage does the star have an inert (non-burning)carbon core surrounded by shells of helium and hydrogen burning?

What can we learn about a star from a life track on an H-R diagram?

Photographs of many young stars show long jets of material apparently being ejected from their poles.

You discover a binary star system in which one star is a 15 MSᵤn main-sequence star and the other is a 10 MSᵤn giant.How do we think that a star system such as this might have come to exist?

Which of the following lists the stages of life for a low-mass star in the correct order?

The following questions refer to the sketch below of an H-R diagram for a star cluster. -Consider the star to which the arrow points.Which of the following statements about this star is not true?

Suppose that the star Betelgeuse (the upper left shoulder of Orion)were to supernova tomorrow (as seen here on Earth).What would it look like to the naked eye?

Which of the following observations would not be likely to provide information about the final,explosive stages of a star's life?

Which event marks the beginning of a supernova?

Which of the following spectral types is more likely to be a flare star?

The helium fusion process works by fusing two helium nuclei into one beryllium nucleus.

Process of Science: How do observations of stars help us understand the theory of atomic nuclei?

The following questions refer to the H-R diagram below that shows the life track of a 1-solar-mass star,with various stages labeled with Roman numerals. -During which stage does the star have an inert (nonburning)carbon core?

Convection never occurs in the core of any type of star.

Do you think it is possible that a 1.5-solar-mass red giant could harbor an advanced civilization? Explain your reasoning.

Why is Supernova 1987A particularly important to astronomers?

Which of the following types of data provide evidence that helps us understand the life tracks of low-mass stars?

What do astronomers mean when they say that we are all "star stuff"?