
Unit 4 Day 15: Star Spectra - Practice
Flashcard
•
Science
•
8th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What are the two main gases that make up most of the sun?
Back
Helium and Hydrogen
2.
FLASHCARD QUESTION
Front
What is the primary use of emission/absorption spectra in astronomy?
Back
To identify the composition of stars.
3.
FLASHCARD QUESTION
Front
What does blue shifting in a star's spectrum indicate?
Back
The star is moving towards the observer.
4.
FLASHCARD QUESTION
Front
What is the significance of star spectra in understanding the universe?
Back
They help determine the composition, temperature, and movement of stars.
5.
FLASHCARD QUESTION
Front
What is the difference between emission and absorption spectra?
Back
Emission spectra show bright lines at specific wavelengths, while absorption spectra show dark lines where light has been absorbed.
6.
FLASHCARD QUESTION
Front
How can we determine the speed of a star moving towards us?
Back
By analyzing the shift in its spectral lines.
7.
FLASHCARD QUESTION
Front
What is a spectrum?
Back
A spectrum is a range of different colors or wavelengths of light emitted or absorbed by an object.
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