Earth and Space Flashcards
1
Q
Why do big stars burn fuel faster?
A
High mass = Hotter core = Faster nuclear fusion = shorter life
2
Q
What are white dwarfs?
A
Cores of sun-sized stars. Glow bc radiating leftover heat
3
Q
Luminosity definition
A
Energy output per second
4
Q
Magnitude definition
A
the measure of brightness 10 parsecs from Earth
5
Q
Small star = ?
A
small surface area, low surface area, low surface temp
6
Q
nuclear fusion occurs rapidly when…
A
star is high in mass
7
Q
what is a RED DWARF?
A
smallest kind of mss
8
Q
A
9
Q
is the star dull or bright if magnitude = 14
A
dull
10
Q
is the star dull or bright if magnitude = -10
A
bright
11
Q
red giant or supergiant when solar mass > 3 ?
A
red supergiant
12
Q
Nebula to Protostar(3 things)
A
- dust n gas pulled tgt by gravity
- increase in temp n pressure
- Ep to Ek
13
Q
MSS(3 things)
A
- hot enough for nuclear fusion
- inward outward equal pressure
- increase temp n luminosity
14
Q
Giants(3 things)
A
- gravity wins n star shrinks
- He fusion
- repeated process
15
Q
White to Black dwarfs(3 things)
A
- fusion ends at oxygen
- emits light w leftover heat
- cools to black dwarf
