Front

What does the H-R diagram classify stars based on?

Back

Temperature and luminosity.

Front

Which star has the lowest temperature?

Back

Red Star.

Front

What is the effective temperature of a star related to?

Back

Color.

Front

If our sun is yellow, what color would a star colder than our sun be?

Back

Red.

Front

What is the coldest type of star?

Back

Red Star.

Front

What is the H-R diagram used for?

Back

To plot stars according to their brightness and temperature.

Front

What are the two main axes of the H-R diagram?

Back

Temperature (horizontal axis) and luminosity (vertical axis).

Front

What type of stars are found in the upper left corner of the H-R diagram?

Back

Hot, luminous stars.

Front

What type of stars are found in the lower right corner of the H-R diagram?

Back

Cool, dim stars.

Front

What does a star's luminosity indicate?

Back

The total amount of energy emitted by the star per second.