HR Diagrams- Bell Ringer

Front

What determines the color of a star?

Back

The temperature of the star determines its color.

Front

What characteristics are used to classify stars?

Back

Stars are classified based on their temperature/color and brightness.

Front

What happens as we move from right to left on the HR diagram?

Back

Stars get hotter as we move from right to left.

Front

What color stars are the coolest?

Back

Red stars are the coolest.

Front

Which section of the HR diagram includes the coolest, brightest stars?

Back

Section 2 includes the coolest, brightest stars.

Front

What is the HR diagram?

Back

The HR diagram is a scatter plot of stars showing the relationship between their absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

Front

What is the main axis of the HR diagram?

Back

The main axis of the HR diagram is temperature (or color) on the horizontal axis and luminosity (or brightness) on the vertical axis.

Front

What type of stars are found in the upper left of the HR diagram?

Back

The upper left of the HR diagram contains hot, luminous stars.

Front

What type of stars are found in the lower right of the HR diagram?

Back

The lower right of the HR diagram contains cool, dim stars.

Front

What is 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.