What is the primary fuel used by a main sequence star?
Star Formation

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Science
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9th - 10th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
Hydrogen
2.
FLASHCARD QUESTION
Front
What are the two most abundant elements in stars?
Back
Hydrogen and helium
3.
FLASHCARD QUESTION
Front
How long can a star that has begun nuclear fusion last?
Back
Millions or even billions of years
4.
FLASHCARD QUESTION
Front
What is the main force that causes stars to form from nebula gas clouds?
Back
Gravity
5.
FLASHCARD QUESTION
Front
Why does a planetary nebula glow?
Back
The core is so hot it gives off light, even though fusion has ended.
6.
FLASHCARD QUESTION
Front
What is a nebula?
Back
A large cloud of gas and dust in space, often the birthplace of stars.
7.
FLASHCARD QUESTION
Front
What is nuclear fusion?
Back
The process by which two light atomic nuclei combine to form a heavier nucleus, releasing energy.
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