HR Diagram

The Hertzprung Russell Diagram consists of two axis that are labelled...

• Luminosity and Size
• Luminosity and Temperature
• Size and Age
• Mass and Temperature

Proxima Centauri has a luminosity of less than 1.  What does that mean?

• It is brighter than the Sun.
• It is hotter than the Sun.
• It is dimmer than the Sun.
• It is cooler than the Sun.

What determines the color of a star? 

• It's size
• It's temperature
• It's composition
• They are all the same color 

Which star has the lowest temperature?

• A
• B
• C
• D

As you move from the bottom to the top of the H R diagram the __________ changes.

• Temperature
• Luminosity or Brightness

What is magnitude?

• degree of compactness of a star.

• degree of temperature of a star.

• the age of a star.

• degree of brightness of a star.

The best description of a super giant star would be -

• hot and bright

• hot and dim

• average brightness and temp

• cool and bright

In the diagram given, what happens as we move to the left?

• Stars Get Larger
• Stars get Colder
• Stars get hotter

Which star is the coldest?

• Yellow Star
• Red Star
• Orange Star
• Blue Star

Compared to the rest of the stars, our sun is considered...

• Extremely Large and Cold
• Small with a medium temperature
• Medium size with medium temperature