Ch. 25 Earth Science Test

Which of the following is NOT a type of galaxy?

Which main-sequence stars are the most massive?

A star is said to be born when ___

According to the figure which main-sequence stars are brightest?

Stellar distances are usually expressed in what units?

About 60 percent of all known galaxies are classified as ___

Apparent magnitude refers to a star's ___ as it appears from ___

What is the next stage in the sun's life cycle?

Our galaxy is called the ___

Massive stars terminate in a brilliant explosion called a ___

What will be the final stage in  the sun's life cycle?

Stars of which color have the highest surface temperature?

The difference in the brightness of 2 stars with the same temp is attributable to their ___

Stars of which color have the coolest surface temperature?

The Milky Way is classified as a(n) _____ galaxy

According to Hubble's law, galaxies are retreating at a speed that is proportional to their __

Which of the following does NOT affect the apparent brightness of a star?

The mass of a star can be determined by studying ____

Which of the following indicates that the universe is expanding?

The measure of a star's brightness is called its ___

About 90% of the stars on the H-R diagram are ___

In addition to size & shape, 1 of the major differences among galaxies is the _ of their stars

A H-R diagram shows the relationship between ___

Which of the following is true about parallax?

Which main-sequence stars are the least massive?

At its nucleus, the Milky Way Galaxy is about 100,000 light-years wide and ___

According to the figure the sun has an absolute magnitude of ____

Where is our sun located in the Milky Way?

Light cannot escape the intense gravitational pull of a ____

Another name for the interstellar matter that will eventually form a star is ___

Which of the following is NOT a type of nebula?

Which magnitude would be associated with the brightest star?

Patterns of stars called ___ were originally named in honor of mythological characters

A light-year is the distance ___ travels in a year

The sun is a ____