Unit Test 4.1, 4.2, & 4.3 Review

Front

What determines a star's brightness or luminosity?

Back

A star's brightness or luminosity is determined by its size and temperature.

Front

What is the minimum mass for a star to fuse heavier elements up to iron?

Back

High mass stars that are at least 8-10 times more massive than our Sun can fuse heavier elements all the way up to iron.

Front

What happens to the Sun when it runs out of Helium?

Back

When the Sun runs out of Helium, its outer layers will be blown off, leaving behind a planetary nebula.

Front

Where is our Solar System located in the Milky Way galaxy?

Back

Our Solar System is located about halfway out from the galactic center in the Milky Way galaxy.

Front

What does a star's color indicate?

Back

A star's color indicates its relative surface temperature and its spectral class.

Front

What is luminosity?

Back

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

Front

What is a planetary nebula?

Back

A planetary nebula is a shell of gas ejected from a star during the late stages of its evolution.

Front

What is the significance of a star's spectral class?

Back

A star's spectral class categorizes it based on its temperature and the characteristics of its spectrum.

Front

What is the relationship between a star's size and its lifespan?

Back

Generally, larger stars have shorter lifespans because they burn through their nuclear fuel more quickly.

Front

What is a supernova?

Back

A supernova is a powerful and luminous explosion that occurs at the end of a star's life cycle.