2nd 9 Weeks Review

Front

What variable is found along the X-AXIS on the HR diagram?

Back

Temperature

Front

What variable is found along the Y-AXIS on the HR diagram?

Back

Luminosity (brightness)

Front

How is most of Earth's carbon made available?

Back

It is recycled through the decomposition of dead organisms.

Front

What type of galaxy is characterized by a spiral shape?

Back

Spiral galaxy

Front

What determines the color of a star?

Back

It's temperature.

Front

What is the main function of the HR diagram?

Back

To classify stars based on their luminosity and temperature.

Front

What is luminosity?

Back

The total amount of energy emitted by a star per unit of time.

Front

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

Back

Hotter stars appear blue or white, while cooler stars appear red.

Front

What is a galaxy?

Back

A massive system of stars, stellar remnants, interstellar gas, dust, and dark matter.

Front

What are the three main types of galaxies?

Back

Spiral, elliptical, and irregular.