What is the life cycle of a star?
Life Cycle of Stars

Flashcard
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Science
•
8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The life cycle of a star includes several stages: nebula, protostar, main sequence, red giant or supergiant, and finally, either a white dwarf, neutron star, or black hole.
2.
FLASHCARD QUESTION
Front
What is a protostar?
Back
A protostar is an early stage in the formation of a star, where gas and dust collapse under gravity, but nuclear fusion has not yet begun.
3.
FLASHCARD QUESTION
Front
What defines a main sequence star?
Back
A main sequence star is a star that is in the stable phase of its life cycle, where it fuses hydrogen into helium in its core.
4.
FLASHCARD QUESTION
Front
What happens to a star when it exhausts its hydrogen fuel?
Back
When a star exhausts its hydrogen fuel, it leaves the main sequence and can expand into a red giant or supergiant, depending on its mass.
5.
FLASHCARD QUESTION
Front
What is a supernova?
Back
A supernova is a powerful and luminous explosion that occurs at the end of a star's life cycle, often resulting from the collapse of a massive star.
6.
FLASHCARD QUESTION
Front
What is a black hole?
Back
A black hole is an object with a gravitational pull so strong that nothing, not even light, can escape from it.
7.
FLASHCARD QUESTION
Front
How does the mass of a star affect its life cycle?
Back
The mass of a star determines its temperature, luminosity, and the length of its life cycle; more massive stars have shorter lifespans.
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