Light
H.R.
Stars
Milky Way
Life & Death

100

Would a higher or lower number be associated with a bright star?
What is lower?

100

About 90 percent of stars on the H-R diagram are…
What are main sequence stars?

100

Patterns of stars called _____ were originally named in honor of mythological characters of great heroes.
What is constellations?

100

At its nucleus, the Milky Way is about 100,000 light-years wide and …
What is 10,000 light-years thick?

100

When a main-sequence star has exhausted the fuel in its core, it becomes a …
What is a red giant star?

200

The measure of a star’s brightness is called its…
What is magnitude?

200

The H-R diagram shows the relationship between…
What is temperature and absolute magnitude?

200

Another name for the interstellar matter that will eventually form a star is…
What is a nebula?

200

Where is the sun located in the Milky Way?
What is within one of the spiral arms?

200

Massive stars terminate in a brilliant explosion called a ….
What is a supernova?

300

A light-year is approximately…
What is 9.5 trillion kilometers?

300

Which main-sequence stars are the most massive (color)?
What is blue stars?

300

Which force is most responsible for the formation of a star?
What is gravity?

300

The Milky Way is classified as a(n) _____ galaxy.
What is a spiral galaxy?

300

A star is said to be born when…
What is a protostar reaches a temperature high enough for nuclear fusion to begin?

400

Light cannot escape the intense gravitational pull of a…
What is a black hole?

400

Which main-sequence stars are the least massive (color)?
What is red stars?

400

The sun is a …. (Where does it fall on H-R diagram)
What is a main sequence star?

400

What is the brightest star in our solar system?
What is the sun?

400

All stars, regardless of size, eventually…
What is run out of fuel and collapse?

500

Which of the following does NOT affect the Apparent brightness of a star? a) How old the star is b) How big the star is c) How hot the star is d) How far away the star is
What is "A", how old the star is?

500

The difference in the brightness of two stars with the same surface temperature is attributable to their…
What is size?

500

What will be the final stage in the sun’s life cycle?
What is a black dwarf?

500

In the Milky Way, the most abundant gas in emission nebulae is…
What is Hydrogen?

500

In the cores of extremely hot red giants, nuclear reactions convert helium to ….
What is carbon?