8.8A H-R Diagram Mini Flashcard 2

Front

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

Back

The H-R Diagram is a scatter plot that shows the relationship between the brightness (luminosity) of stars and their surface temperature, helping to classify stars into different categories.

Front

What classification of stars shows the greatest range of temperatures and brightness?

Back

Main Sequence.

Front

What type of star is about as bright as our sun and has a surface temperature of 25,000 K?

Back

White dwarf.

Front

How does Betelgeuse compare to the Sun in terms of size and brightness?

Back

Betelgeuse is cooler and brighter than the Sun.

Front

What is a red giant star?

Back

A red giant is a type of star that has expanded and cooled, resulting in a lower surface temperature (around 3,800 K) but a much higher luminosity.

Front

What are the main characteristics of a white dwarf?

Back

A white dwarf is a small, dense star that is the remnant of a star that has exhausted its nuclear fuel, typically having a high surface temperature but low luminosity.

Front

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

Back

The Main Sequence is where most stars, including the Sun, are found; it represents a stable phase of stellar evolution where stars fuse hydrogen into helium.

Front

What type of star is Regulus classified as?

Back

Regulus is classified as a Main Sequence star.

Front

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

Back

Generally, as a star's surface temperature increases, its luminosity also increases, which is depicted in the H-R Diagram.

Front

What are blue giants?

Back

Blue giants are massive stars that are very hot and luminous, found at the upper left of the H-R Diagram.