BWA #7

Analyze this HR Diagram. Which group of stars is considered to have lower than average luminosity as well as a higher than average temperature?

• Giants
• Main Sequence
• White Dwarfs
• Super Giants

Analyze this HR Diagram. Which group of stars is considered to have higher than average luminosity as well as a lower than average temperature?

• Giants
• Main Sequence
• White Dwarfs
• Super Giants

A collection of dust and gases where stars can form is called a:

• Galaxy
• Nebula
• Black Hole
• Supernova

Our Sun is located near the edge of a _____ ______ galaxy, named the ____________.

• disc shaped, Milky Way
• disc shaped, Solar System
• elliptical shaped, Milky Way
• elliptical shaped, Solar System

Stars are classified on the HR diagram by:

• luminosity & brightness
• temperature & absolute magnitude luminosity
• temperature & apparent magnitude
• temperature & density

Choose the best description of Bernard's star.

• Bernard's star is both cooler and brighter than the sun.
• Bernard's star is both cooler and dimmer than the sun.
• Bernard's star is neither cooler or dimmer than the sun.
• Bernard's star is brighter and hotter than the sun.

The sun is not:

• a medium size star.
• near the edge of a disc-shaped galaxy.
• many thousands of times closer to Earth than any other star.
• in the center of the Milky Way.

The Milky Way galaxy is described as a disk of stars orbiting a central point on the disk. Which of these best explains why people on Earth cannot see the entire shape of the Milky Way?

• Earth is a part of this galaxy
• Many more stars exist outside the galaxy
• The stars in the center of the galaxy are extremely small.
• The center of the galaxy consists of a dense cluster of stars.

Based on this diagram which type of stars would belong to spectral class M and have the lowest luminosity?

• Main Sequence Stars
• Giants
• Super Giants
• White Dwarfs

Based on this diagram which type of stars would belong to spectral class G and have the highest luminosity?

• Main Sequence Stars
• Giants
• Super Giants
• White Dwarfs