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WorksheetsClassifying Stars
Total questions: 10
Worksheet time: 5mins
What color are the hottest star?
Red
Orange
Yellow
Blue
What color are the coolest stars?
Red
Yellow
Orange
Blue
Where on the HR star diagram are the main sequence stars?
Top right
Middle
Bottom left
What kinds of stars on the HR diagram are dying?
Giants
Main sequence stars
Dwarfs
Both giants and dwarfs
What does the luminosity of a star indicate about its brightness?
If it's a negative number, it's a bright star
If it's a positive number, it's a dim star
Its how many times brighter the star is compared to our sun
What does the absolute magnitude indicate about a star?
Its color
Its the actual brightness of a star, and negative numbers mean it is brighter
It tells how many times brighter it is compared to our sun
What are main sequence stars running out of when they start to die?
Hydrogen atoms (or protons) to fuse together
Hydrogen atoms (or electrons) to fuse together
What stage of life is OUR SUN in on the HR Diagram?
Dwarf
Giant
Main Sequence
What spectral class is OUR SUN classified on the HR Diagram?
O
A
G
M
Approximately what is our sun's absolute magnitude?
0
1
4.5
-4.5
