Astronomy: Chapter 20 Study Guide - Stellar Evolution

What is the term burn used to describe in astronomy?

• Nuclear fission

• Combustion

• Decomposition

• Nuclear fusion

What element is mainly used by a star for energy if it is on the main sequence?

• Oxygen

• Helium

• Hydrogen

• Carbon

What is the dividing line between low-mass stars and high-mass stars?

• 2.5 solar-masses

• 8 solar-masses

• 12solar-masses

• 17 solar-masses

What is significant about the number of solar masses dividing a high-mass star from a low-mass star?

• High-mass stars all become black holes.

• High-mass stars can fuse carbon to carbon.

• High-mass stars can fuse carbon.

• This division was chosen by Albert Einstein.

The majority of stars spend the majority of their time on which part of the H-R diagram?

• Subgiant branch

• Horizontal Branch

• Red Giant Branch

• Main Sequence

How is the term evolution used in astronomy?

• Track the changes in multiple stars from one generation to the next.

• Track the changes in one star over its lifespan.

• Track the changes in the make-up of a galaxy over time.

• Track the changes in a cluster during the course of 100 billion years.

What is the ultimate fate of a star with a mass of 2 solar-masses?

• Brown dwarf

• White Dwarf

• Red Giant

• Supernova

What is the ultimate fate of a star with a mass of 0.08 solar-masses?

• Brown dwarf

• White Dwarf

• Red Giant

• Supernova

What is the ultimate fate of a star with a mass of 13 solar-masses?

• Brown dwarf

• White Dwarf

• Red Giant

• Supernova

The area of gravitational influence of a star is called a ___________ lobe?

• Roche

• Lagrangian

• Einsteinian

• Newtonian

• Galilean