HR Diagram 2
Flashcard
•
Science
•
8th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the HR Diagram?
Back
The HR Diagram (Hertzsprung-Russell Diagram) is a scatter plot of stars showing the relationship between their absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.
2.
FLASHCARD QUESTION
Front
What spectral class is the sun classified in?
Back
The sun is classified as a main-sequence star in spectral class G.
3.
FLASHCARD QUESTION
Front
What is a main-sequence star?
Back
A main-sequence star is a star that is in the stable phase of its life cycle, where it fuses hydrogen into helium in its core.
4.
FLASHCARD QUESTION
Front
What are the characteristics of spectral class O stars?
Back
Spectral class O stars are very hot (over 30,000 K), very bright, and are typically blue in color.
5.
FLASHCARD QUESTION
Front
How do main-sequence stars in spectral class M compare to those in spectral class B?
Back
Main-sequence stars in spectral class M are cooler and less bright than those in spectral class B.
6.
FLASHCARD QUESTION
Front
What is luminosity in the context of stars?
Back
Luminosity is the total amount of energy emitted by a star per unit time, often compared to the sun's luminosity.
7.
FLASHCARD QUESTION
Front
What is the temperature range for spectral class K stars?
Back
Spectral class K stars have temperatures ranging from about 3,900 K to 5,200 K.
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