Star Evolution
HR Diagram
Miscellaneous
Miscellaneious II
HR Diagram II
100
What is the first stage of star evolution?
What is dust and gas form a nebula?
100
What are the units at the bottom of a HR diagram measured in?
What is Celsius degrees?
100

What is the relationship between Luminosity and surface temperature of a star?

As temperature increase , luminosity increase.

100

A star located off the main sequence indicates what?

a. it is in the dying stage

b. its fuel is running out.

c. it is expanding causing its temperature to cool.

d. it has collapsed and is a white dwarf.

e. it has entered the intermediate or late  stageof its existence.

100
Which is the brightest star on the HR Diagram?
What is Rigel?
200
What is the second stage of stellar evolution?
What is gravity compresses the Nebula to form a Protostar?
200
What happens as you move up on the Y axis of an HR Diagram?
The brightness or luminosity increases
200

What is the luminosity of our sun?

The luminosity of our sun is 1 

200

identify the process that produces the Sun energy?

Nuclear fusion

200
Which is the least bright star on the HR diagram?
What is Sirius B?
300
What is the 3rd stage of stellar evolution?
What is a main sequence star is formed from nuclear fusion?
300
What do we call the diagnal section that goes through an HR Diagram?
Main sequence stars
300

Betelgeuse and Aldebaran are both red-giant stars. Give A statement comparing their luminosity and temperature values. 

Betelgeuse has a higher luminosity and slightly lower temperature than Aldebaran.  

           OR

Aldebaran has a lower luminosity and slightly higher temperature then Betelgeuse

300
How are stars and planets different?
Planets reflect light, stars give off their own light
300
Which color of stars are in the middle of the HR diagram and represent stars that are moderately hot, relative to other stars?
What are yellow stars?
400
What path do stars take that have low mass?
What is they become white dwarfs and later black dwarfs with very high density?
400
What do we call the bottom group of stars under the diagnal section of an HR diagram?
What are white dwarf stars
400

Compared to the temperature and luminosity of the star Polaris, the star Sirius is 

1. hotter and more luminous

2. hotter and less luminous

3. cooler and more luminous

4. cooler and less luminous

2. hotter and less luminous

400
What is the doppler shift?
objects moving away from us have red shift and the distance between wave lengths is greater. Objects moving towards us have blue shift and shorter distances between wave lengths
400
What type of star is Aldebaran?
What is a Giant star?
500
What path do hi mass stars take?
They become super novas, and then either neutron stars or black holes?
500
Name all 4 groups of stars on an HR diagram
What are the super giants, main sequence, giant and white dwarf stars?
500
What is nuclear fusion? Explain.
When hydrogen is burned and becomes helium, main sequence stars do this which causes them to shine
500

The sun revolves around the center of 

1. Polaris

2. Aldebaran

3. Earth

4. Milky Way Galaxy



4. Milky Way Galaxy

500

The sun is inferred to be the most luminous when it is classified as a

1. white dwarf star

2. gas cloud (nebula)

3. main sequence star

4. giant star

4. giant star

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