What is a protostar?
Stars , Nuclear Fusion, and the Sun

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Science
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9th - 12th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
A protostar is a stage in the formation of a star, where a cloud of gas and dust begins to collapse under its own gravity, leading to the formation of a dense core that will eventually become a star.
2.
FLASHCARD QUESTION
Front
What is a red giant?
Back
A red giant is a late stage in the life cycle of a star, characterized by a significant increase in size and a reddish color, occurring after the star has exhausted the hydrogen in its core.
3.
FLASHCARD QUESTION
Front
What is a star?
Back
An extremely hot ball of glowing gas, primarily composed of hydrogen and helium, undergoing nuclear fusion to produce energy.
4.
FLASHCARD QUESTION
Front
What is a nebula?
Back
A nebula is a vast cloud of dust and gas in space, often serving as the birthplace of stars.
5.
FLASHCARD QUESTION
Front
What is nuclear fusion?
Back
Nuclear fusion is the process by which two light atomic nuclei combine to form a heavier nucleus, releasing energy in the process, which powers stars.
6.
FLASHCARD QUESTION
Front
What is the main sequence?
Back
The main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness, where stars spend the majority of their lifetimes fusing hydrogen into helium.
7.
FLASHCARD QUESTION
Front
What is a planetary nebula?
Back
A planetary nebula is an astronomical object formed from the outer layers of a star that has shed its envelope at the end of its life cycle, often appearing as a glowing shell of gas.
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