HR diagrams (all)

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Science
•
6th - 8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What is an HR diagram?
Back
The Hertzsprung-Russell diagram (HR 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 does luminosity mean in the context of stars?
Back
Luminosity is the total amount of energy emitted by a star per unit of time, often compared to the Sun's luminosity.
3.
FLASHCARD QUESTION
Front
What are main-sequence stars?
Back
Main-sequence stars are stars that are in the stable phase of their life cycle, where they fuse hydrogen into helium in their cores.
4.
FLASHCARD QUESTION
Front
What is the significance of a star's surface temperature?
Back
A star's surface temperature determines its color and spectral class, influencing its luminosity and life cycle.
5.
FLASHCARD QUESTION
Front
What are red dwarfs?
Back
Red dwarfs are small, cool stars on the main sequence, with low luminosity and temperature.
6.
FLASHCARD QUESTION
Front
What is a supergiant star?
Back
Supergiant stars are among the largest stars in the universe, with high luminosity and large radii, often in the later stages of stellar evolution.
7.
FLASHCARD QUESTION
Front
What is the spectral classification of stars?
Back
Spectral classification categorizes stars based on their temperature and the characteristics of their spectra, using letters O, B, A, F, G, K, and M.
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