8.8A H-R Diagram Mini Flashcard 3

Front

What is the Hertzsprung-Russell (H-R) Diagram?

Back

A graphical representation of stars that plots their brightness against their surface temperature, used to classify stars and understand their evolution.

Front

What type of stars are found along the Main Sequence of the H-R Diagram?

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Stars that are in a stable phase of hydrogen burning, including our Sun.

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What are White Dwarfs?

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Small, dense stars that are the remnants of low to medium mass stars after they have exhausted their nuclear fuel.

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What are Supergiants?

Back

Massive stars that have expanded and cooled, found at the upper end of the H-R Diagram, characterized by high luminosity.

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What is the relationship between a star's color and its temperature?

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A star's color indicates its surface temperature; blue stars are hotter, while red stars are cooler.

Front

What does luminosity refer to in the context of stars?

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The total amount of energy emitted by a star per unit of time, often measured in watts.

Front

How can scientists classify stars using the H-R Diagram?

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By analyzing their brightness (luminosity) and surface temperature, which helps in determining their stage in the stellar lifecycle.

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What is intrinsic brightness?

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The actual brightness of a star, independent of its distance from Earth.

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What is the significance of the Main Sequence in the H-R Diagram?

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It represents the majority of stars, including those in the stable phase of hydrogen fusion.

Front

What are Red Giants?

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Stars that have expanded and cooled after exhausting hydrogen in their cores, found above the Main Sequence on the H-R Diagram.