Astr 104, Spring 2008 – Quiz 6

1. In which of these places would you expect new stars to form?
a. An asteroid belt.
b. A globular cluster.
c. A molecular cloud.
d. A radiation zone.

2. What is the main factor that makes interstellar matter collapse and form new stars?
a. Gravity.
b. Heat.
c. Rotation.
d. Radio waves.

3. When is an object in space called a star?
a. When we can see it with our telescopes from Earth.
b. When it has a clearly defined surface and spherical shape.
c. When it starts shining because it emits light and radiation.
d. When nuclear fusion reactions start occurring in its core.

4. How massive are the largest stars?
a. About 2 as massive as the Sun.
b. About 10 times as massive as the Sun.
c. About 100 times as massive as the Sun.
d. About 1000 times as massive as the Sun.

5. What is a protostar?