Quiz: Star Formation and Lifetimes
1.
List one event that can trigger the collapse of a nebula? _________________________________
2.
Which force responsible for a nebula to begin collapsing a.
Electromagnetic b. Strong Nuclear c. Gravity d. Weak Nuclear
3.
What object forms if the critical mass known as Jeans mass is reached within a nebula a.
A brown dwarf b. Protostar c. white dwarf
4.
If the mass of a protostar does not reach Jean’s Mass it becomes a a.
Brown dwarf b. Main Sequence Star c. White dwarf d. pulsar d. pulsar
5.
What happens to the temperature at the center of a protostar over time a.
Decreases b. Increases c. stays the same
6.
As the density of a region increases the temperature increases/decreases
7.
Which will live longer? high mass star/low mass star
Quiz: Star Formation and Lifetimes
1.
List one event that can trigger the collapse of a nebula? _________________________________
2.
Which force responsible for a nebula to begin collapsing a.
Electromagnetic b. Strong Nuclear c. Gravity d. Weak Nuclear
3.
What object forms if the critical mass known as Jeans mass is reached within a nebula a.
A brown dwarf b. Protostar c. white dwarf d. pulsar
4.
If the mass of a protostar does not reach Jean’s Mass it becomes a a.
Brown dwarf b. Main Sequence Star c. White dwarf d. pulsar
5.
What happens to the temperature at the center of a protostar over time a.
Decreases b. Increases c. stays the same
6.
As the density of a region increases the temperature increases/decreases
7.
Which will live longer? high mass star/low mass star

Quiz: Star Formation and Lifetimes
Mass of the Star a.
.67M
sun b.
M sun c.
1.3M
sun
Main Sequence lifetime of the Star
45 billion years
10 billion years
800 million years
8.
Which star will live longest?
9.
Star c will live a.
less than half the time as long as star b b.
1.3 times as long as star b c.
more than 1.3 times as long as star b
10.
Calculate how much longer star a will live than star c.
11.
Why do you think a small star lives longer than a big star?
Quiz: Star Formation and Lifetimes
Mass of the Star a.
.67M
sun b.
M sun c.
1.3M
sun
Main Sequence lifetime of the Star
45 billion years
10 billion years
800 million years
8.
Which star will live longest?
9.
Star c will live a.
less than half the time as long as star b b.
1.3 times as long as star b c.
more than 1.3 times as long as star b
10.
Calculate how much longer star a will live than star c.
11.
Why do you think a small star lives longer than a big star?