Reading & Analyzing the H-R Diagram

Front

What is a star?

Back

A star is a celestial body composed of gases that emit light due to nuclear reactions.

Front

Which star has the lowest temperature?

Back

Star C has the lowest temperature.

Front

What type of stars are the hottest?

Back

Blue stars are the hottest.

Front

Do large mass stars have a longer or shorter life span?

Back

Large mass stars have a shorter life span.

Front

Which star is the dimmest on the H-R Diagram?

Back

Van Maanen's Star is the dimmest on the H-R Diagram.

Front

What does the H-R Diagram represent?

Back

The H-R Diagram represents the relationship between the luminosity and temperature of stars.

Front

What is luminosity?

Back

Luminosity is the total amount of energy emitted by a star per unit time.

Front

What is the significance of a star's color?

Back

A star's color indicates its temperature; blue stars are the hottest, while red stars are the coolest.

Front

What is the main sequence in the H-R Diagram?

Back

The main sequence is a continuous band of stars that represents the stage where stars spend most of their life cycle, fusing hydrogen into helium.

Front

What happens to a star after it exhausts its hydrogen fuel?

Back

After exhausting hydrogen fuel, a star may expand into a red giant or supergiant, depending on its mass.