CCA 3B

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

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

• Solar System in the largest circle, then Nebula, followed by the Galaxies in the smallest circle.
• Nebula in the largest circle, then Galaxies, followed by the Solar System in the smallest circle.
• Galaxies in the largest circle, then Nebula, followed by the Solar System in the smallest circle.
• The diagram is labeled correctly.

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.

Black holes can be found in the Universe. When examining a black hole with a special telescope, scientist determined that a specific black hole was emitting waves with a wavelength of 1.41x10^-12 Hz. The special telescope most likely detects:

• microwaves
• visible light
• x-rays
• gamma rays

A light year is used to measure _______, and the distance from the sun to star X; if star X is 3 times as far from the sun as Wolf 289, then star X is _______ from the sun. 

• time, 23.4 light years
• distance, 15.6 light years
• time, 7.8 light years
• distance, 23.4 light years

The Sun is what type of celestial object?

• Planet 
• Nova
• Start
• Asteroid