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Earth Science > Stars > Flashcards

Stars Flashcards

1
Q

Low Mass Stars

A

1-7x Solar Mass!

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2
Q

High Mass Stars

A

8-20x Solar Mass!

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3
Q

Mass relates to Fusion Rate, Temperature and Pressure how?

A

Directly related! Low mass, low fusion rate, low temp, low pressure.

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4
Q

Stellar Nebula

A

Protostar! Also, star nursery. Attempts to achieve equilibrium between gravity, core pressure, and temperature!

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5
Q

Main Sequence Star

A

Average or Massive for low and high mass stars respectively! Nuclear fusion! H to He
Massive stars also produce heavy metals that regulate accretion rates of normal stars.

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6
Q

Red Giant

A

Loss of fuel in the core means bigger star! Up to 1000x more, in fact.
Low Mass.

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7
Q

Red Supergiant

A 
Biggest stars in the universe with a short life. Forms near the end of star life!
100x bigger than sun
Red- 10x solar mass, cooler
Blue- 8x solar mass, hotter
High Mass.
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8
Q

Planetary Nebula

A

No energy left, so time to shed layers and get complex.

Low Mass.

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9
Q

Supernova

A

Stellar explosion triggered by loss of remaining fuel, enriches interstellar medium!
Fusion for a iron.
Instantaneous absorption of energy, rapid collapse, KABOOM
High Mass.

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10
Q

White Dwarf

A

Very dense, end stage star. Becomes a black dwarf later on.

Low Mass.

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11
Q

Neutron Star

A

Remnant of supernova that ejects particles.
1.5-2.8 solar mass. Very dense, 100 B surface gravity.
Solid core, liquid interior
Spins very fast and has high magnetic field!
DOESNT GLOW ITS SO BURNT OUT
Mostly neutrons.
High Mass.

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12
Q

Pulsar

A

Highly magnetized, spinning neutron star.
Emits electromagnetic radiation energy in pulses.
High Mass.

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13
Q

Black Hole

A

Other possibility for High Mass star.
Size is uncertain and mass is contained in singularity.
Has a very strong gravity not even light can escape, called event horizon.
3-12 solar mass, can only be formed by stars >20 solar mass
Time decreases as gravity increases.

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14
Q

Spaghettification

A

Stretching in black hole

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15
Q

Class Order from Hottest to Coolest

A

Oh Be A Fine Guy, Kiss Me

OBAFGKM

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16
Q

O class color?

A

Blue

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17
Q

A class color?

A

Blue-white

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18
Q

B class color?

A

Blue-white

19
Q

F class color?

A

Yellow-white

20
Q

G class color?

A

Yellow

21
Q

K class color?

A

Orange

22
Q

M class color?

A

Red

23
Q

Ranges for Star Surface Temperatures? Based on OBAFGKM

A 
Less than 3.5 k
3.5-5.5 k
5-6 k
6-7.5 k
7.5-10 k
10-30 k
Above 30 k
24
Q

Stellar Nebula

A

Protostar! Also, star nursery. Attempts to achieve equilibrium between gravity, core pressure, and temperature!

25
Q

Main Sequence Star

A

Average or Massive for low and high mass stars respectively! Nuclear fusion! H to He
Massive stars also produce heavy metals that regulate accretion rates of normal stars.

26
Q

Red Giant

A

Loss of fuel in the core means bigger star! Up to 1000x more, in fact.
Low Mass.

27
Q

Red Supergiant

A 
Biggest stars in the universe with a short life. Forms near the end of star life!
100x bigger than sun
Red- 10x solar mass, cooler
Blue- 8x solar mass, hotter
High Mass.
28
Q

Planetary Nebula

A

No energy left, so time to shed layers and get complex.

Low Mass.

29
Q

Supernova

A

Stellar explosion triggered by loss of remaining fuel, enriches interstellar medium!
Fusion for a iron.
Instantaneous absorption of energy, rapid collapse, KABOOM
High Mass.

30
Q

White Dwarf

A

Very dense, end stage star. Becomes a black dwarf later on.

Low Mass.

31
Q

Neutron Star

A

Remnant of supernova that ejects particles.
1.5-2.8 solar mass. Very dense, 100 B surface gravity.
Solid core, liquid interior
Spins very fast and has high magnetic field!
DOESNT GLOW ITS SO BURNT OUT
Mostly neutrons.
High Mass.

32
Q

Pulsar

A

Highly magnetized, spinning neutron star.
Emits electromagnetic radiation energy in pulses.
High Mass.

33
Q

Black Hole

A

Other possibility for High Mass star.
Size is uncertain and mass is contained in singularity.
Has a very strong gravity not even light can escape, called event horizon.
3-12 solar mass, can only be formed by stars >20 solar mass
Time decreases as gravity increases.

34
Q

Spaghettification

A

Stretching in black hole

35
Q

Class Order from Hottest to Coolest

A

Oh Be A Fine Guy, Kiss Me

OBAFGKM

36
Q

O class color?

A

Blue

37
Q

A class color?

A

Blue-white

38
Q

B class color?

A

Blue-white

39
Q

F class color?

A

Yellow-white

40
Q

G class color?

A

Yellow

41
Q

K class color?

A

Orange

42
Q

M class color?

A

Red

43
Q

Ranges for Star Surface Temperatures? Based on OBAFGKM

A 
Less than 3.5 k
3.5-5.5 k
5-6 k
6-7.5 k
7.5-10 k
10-30 k
Above 30 k

Earth Science (8 decks)

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