
Universe & HR Diagram
Flashcard
•
Science
•
8th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is redshift?
Back
Redshift is the phenomenon where light from an object is shifted to longer wavelengths, indicating that the object is moving away from the observer. It provides evidence that the universe is expanding.
2.
FLASHCARD QUESTION
Front
What is blueshift?
Back
Blueshift is the phenomenon where light from an object is shifted to shorter wavelengths, indicating that the object is moving towards the observer.
3.
FLASHCARD QUESTION
Front
What does the H-R diagram represent?
Back
The Hertzsprung-Russell (H-R) diagram is a scatter plot of stars showing the relationship between their absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.
4.
FLASHCARD QUESTION
Front
What happens to stars as you move left on the H-R diagram?
Back
As you move left on the H-R diagram, stars get hotter.
5.
FLASHCARD QUESTION
Front
What is absolute magnitude?
Back
Absolute magnitude is a measure of the intrinsic brightness of a celestial object, defined as the brightness the object would have at a standard distance of 10 parsecs.
6.
FLASHCARD QUESTION
Front
What type of star is Barnard's star?
Back
Barnard's star is a red dwarf star, which is cool, dim, and has a low luminosity.
7.
FLASHCARD QUESTION
Front
What does it mean if a star is classified as a supergiant?
Back
A supergiant is a very large and bright star, often found in the upper part of the H-R diagram, with a high luminosity and a large radius.
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