The stable period of a star’s life cycle is called...
The birth of a star
Nebula
Neutron star
Main Sequence
2. Multiple Choice
5 minutes
1 pt
Gravity pulls gases and dust particles in space toward one another, squeezing them into a smaller and smaller space. The temperature at the center rises high enough for nuclear fusion of hydrogen to begin. What stage in a stars life cycle is this describing?
The birth of a star
The death of a star
Black Hole
Stellar Nebula
3. Multiple Choice
30 seconds
1 pt
Hotter stars appear to be what color?
Red
Blue
Yellow
Green
4. Multiple Choice
5 minutes
1 pt
Cooler stars appear to be what color?
Red
Blue
Yellow
Green
5. Multiple Choice
20 seconds
1 pt
What determines the color of a star?
It's size
It's temperature
It's composition
They are all the same color
6. Multiple Choice
5 minutes
1 pt
A star at the stage in its life cycle when it stops burning hydrogen, begins burning helium, and expands to a large, low-density star. What stage in the life cycle does this describe?
Supernova
Black Hole
Main Sequence
Red Giant or Red Supergiant
7. Multiple Choice
5 minutes
1 pt
What fuel do stars use?
Oxygen
Hydrogen
Carbon
Iron
8. Multiple Choice
5 minutes
1 pt
In a large mass star, the temperature reaches more than 100 billion degrees. The repulsive forces between the iron nuclei explode the star’s mass into space in a ....
Nebula
Black Hole
Supernova
Neutron star
9. Multiple Choice
20 seconds
1 pt
Larger stars (stars with more mass) have a longer life cycle.
True
False
10. Multiple Choice
45 seconds
1 pt
A relatively small, dense star at the end of its life cycle, which generates little or no energy and has contracted to its densest state. What stage in the life cycle does this describe?
Black Hole
Nebula
White Dwarf
Red Giant
11. Multiple Choice
30 seconds
1 pt
At what stage in a stars life cycle are elements heavier than iron form?
Red Giant
Supernova
Black Hole
Main Sequence
12. Multiple Choice
5 minutes
1 pt
A large cloud of gas and dust in outer space ejected by an aging star near the end of its life cycle. What stage in the life cycle is this describing?
Main Sequence
Planetary Nebula
Black Hole
Neutron Star
13. Multiple Choice
30 seconds
1 pt
what stage of the life cycle of a star is this?
Planetary Nebula
Black Hole
Neutron Star
Giant/Supergiant
14. Multiple Choice
45 seconds
1 pt
The remains from its supernova will form a rapidly spinning, highly magnetic star called a...
Neutron star
Black Hole
White Dwarf
Supernova
15. Multiple Choice
20 seconds
1 pt
What stage of the life cycle of a star is this?
Main Sequence
Red Giant
Black Hole
Neutron star
16. Multiple Choice
30 seconds
1 pt
In the death of a large mass star gravitational collapse is so complete that no energy or matter can escape. This is called a...
Neutron Star
Black Hole
Black Dwarf
Supernova
17. Multiple Choice
30 seconds
1 pt
What stage in a stars life cycle is this?
Main Sequence
Planetary Nebula
Supernova
Neutron Star
18. Multiple Choice
30 seconds
1 pt
This is an image of the formation of a star, also known as a ....