HR Diagram
Flashcard
•
Physics
•
8th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the H-R Diagram used for?
Back
The H-R Diagram (Hertzsprung-Russell Diagram) is used to classify stars based on their luminosity, temperature, and evolutionary stage.
2.
FLASHCARD QUESTION
Front
What are the main regions of the H-R Diagram?
Back
The main regions of the H-R Diagram include the Main Sequence, Red Giants, Supergiants, and White Dwarfs.
3.
FLASHCARD QUESTION
Front
What type of star is found on the Main Sequence?
Back
Main Sequence stars are those that are in the stable phase of hydrogen burning in their cores, such as our Sun.
4.
FLASHCARD QUESTION
Front
What characteristics define a spiral galaxy?
Back
Spiral galaxies are characterized by their flat, rotating disks containing stars, gas, and dust, along with a central concentration of stars known as the bulge.
5.
FLASHCARD QUESTION
Front
What is a key feature of irregular galaxies?
Back
Irregular galaxies lack a distinct shape or structure and often have a chaotic appearance with no clear bulge or spiral arms.
6.
FLASHCARD QUESTION
Front
What does it mean for a star to be 'hot, faint, and blue'?
Back
A star that is 'hot, faint, and blue' typically has a high surface temperature, low luminosity, and emits more blue light, indicating it is a more evolved star.
7.
FLASHCARD QUESTION
Front
What is the significance of Sirius B in the H-R Diagram?
Back
Sirius B is a white dwarf star that is hot and faint, representing a stage in stellar evolution where a star has exhausted its nuclear fuel.
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