Questions for Review


1		Sketch an H-R Diagram of the evolutionary path of the Sun.



2		Sketch an H-R Diagram of the evolutionary path of a 15M_sun star.



3		Describe how a protostar is believed to form.



4		What heats a protostar?



5		What is a bipolar flow?



6		How can we observe protostars? Why are they surrounded by dust and gas?



7		What is a T Tauri star?



8		What is a Bok globule?



9		What determines when a star becomes a main-sequence star?



10		What determines how long a star stays on the main sequence?



11		What makes a star move off the main sequence?



12		Where do main sequence stars end up as they evolve?



13		Why do high- and low-mass stars evolve differently as they become red giants?



14		Why is it easier for a high-mass star than for a low-mass star to burn helium?



15		What is meant by a pulsating star?



16		Why do stars pulsate?



17		What happens to a solar-mass star when it starts to burn helium in its core? What does it turn into?



18		What is a planetary nebula?



19		What is one explanation for how a low-mass star expels its outer layers to make a planetary nebula?



20		What is left when a planetary nebula dissipates?



21		What makes a high-mass star's core collapse?



22		How do the neutrons form in a massive star's remnant core? What other kind of particle is made along with the neutrons?



23		What is a supernova explosion?



24		What kind of subatomic particles have been observed when a supernova explodes?

2002 McGraw-Hill Higher Education
Any use is subject to the Terms of Use and Privacy Policy.
McGraw-Hill Higher Education is one of the many fine businesses of The McGraw-Hill Companies.