
Unit Test 4.1, 4.2, & 4.3 Review
Flashcard
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Science
•
8th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What does a star's color indicate?
Back
A star's color indicates its relative surface temperature and its spectral class.
2.
FLASHCARD QUESTION
Front
What type of star does the Sun become when its core contracts to ignite fusion?
Back
The Sun becomes a 'living' Main Sequence star.
3.
FLASHCARD QUESTION
Front
What is a galaxy?
Back
A galaxy is a huge collection of billions of stars, gas, dust, and dark matter that is held together by gravity.
4.
FLASHCARD QUESTION
Front
What happens to the Sun when it runs out of Hydrogen fuel?
Back
When the Sun runs out of Hydrogen fuel, it will become a 'dying' red giant over a period of 500 million years.
5.
FLASHCARD QUESTION
Front
What determines a star's brightness or luminosity?
Back
A star's brightness or luminosity is determined by its size and temperature.
6.
FLASHCARD QUESTION
Front
What is the life cycle stage of a star after it has exhausted its hydrogen fuel?
Back
After exhausting its hydrogen fuel, a star will enter the red giant phase.
7.
FLASHCARD QUESTION
Front
What is the main sequence phase in a star's life cycle?
Back
The main sequence phase is when a star is fusing hydrogen into helium in its core.
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