Universe Staar Review

There are four groups of stars on the HR Diagram. About 90% of all stars are in the ________.

• Supergiants

• Giants

• White dwarfs

• Main sequence

How can you rearrange the words to match the diagram correctly in terms of sizes in space?

• Solar systems in the largest circle, then galaxies, followed by the universe in the smallest circle.

• Universe in the largest circle, then galaxies, followed by the solar systems in the smallest circle.

• Galaxies in the largest circle, then universe, followed by the solar systems in the smallest circle.

• The diagram is already correct.

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

• Giants

• Main Sequence

• White Dwarfs

• Supergiants

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

• Giants

• Main Sequence

• White Dwarfs

• Supergiants

Our sun is located near the edge of a ______ galaxy, named the _______.

• Spiral shaped; Milky Way

• Spiral shaped; Solar System

• Elliptical shaped; Milky Way

• Elliptical shaped; Solar System

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.

What type of galaxy is this?

• Spiral
• Elliptical
• Irregular 
• Irrational

Which star has the lowest luminosity?

• A
• B
• C
• D

The universe has may different components.  Which list places four components of the universe in the most likely order from smallest to largest.

• Planets, Stars, Galaxies, Nebulae
• Nebulae, Stars, Planets, Galaxies
• Galaxies, Stars, Planets, Nebulae
• Planets, Stars, Nebulae, Galaxies

The Hertzsprung-Russell diagram shows how the sun is classified among the stars.

A star that is several thousand times brighter than the sun with a temperature lower than 4,000 K would be classified as --

• a main-sequence star in spectral class B

• a supergiant in spectral class K

• a main-sequence star in spectral class K or M

• a white dwarf in spectral class B