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Astronomy > Stars (life and death) > Flashcards

Stars (life and death) Flashcards

1
Q

What is the shell or edge of a black hole where light can no longer escape?

A

Event Horizon

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2
Q

What may have formed the early universe?

A

Primordial black holes

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3
Q

What is the spinning neutron star?

A

Pulsar

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4
Q

What is the type of star formed when massive stars explode their remnant cores become highly compressed clumps of neutrons?

A

Neutron stars

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5
Q

What is a high mass of star dies violently by blowing themselves apart in these explosions?

A

Supernova

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6
Q

What is it when the helium core of a “dying” star begins to rapidly fuse and forms carbon and oxygen?

A

Helium Flash

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7
Q

What does the burned out core of a low mass star become?

A

White Dwarf

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8
Q

What are the type of explosions of low mass stars before they expand into a planetary nedula?

A

Nova

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9
Q

What is the dust and gas that stars are formed out of?

A

Nebula

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10
Q

What is it called when hydrogen atoms collide together to form helium and a huge amount of energy?

A

Nuclear fussion

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11
Q

What is the chart that was created by Hertzsprung and Russell and was used to categorize stars by their size and brightness?

A

H.R. diagram

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12
Q

What is the balance between the force of gravity pushing the star in and the energy from the fusion pushing out?

A

Hydrostatic equilibrium

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13
Q

What produces energy from stars?

a. Super nova explosions
b. Nuclear fission
c. Nuclear fusion

A

c. Nuclear fusion

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14
Q

What is the importance of star color?

a. Tells us about the mass
b. Tells us about the temperature of the star
c. Tells us about the age

A

b. Tells us about the temperature of the star

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15
Q

What is the color of the hottest star?

a. Blue
b. Red
c. Green

A

a. Blue

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16
Q

What color is the coolest stars?

a. Blue
b. Red
c. Green

A

b. Red

17
Q

Where are main sequence stars located on the HR diagram?

a. Upper right corner
b. Lower left corner
c. Upper left to lower right

A

c. Upper left to lower right

18
Q

Where are the giant and super giant stars located on the HR diagram?

a. Upper right corner
b. Lower left corner
c. Upper left to lower right

A

a. Upper right corner

19
Q

Where are the tiny white dwarfs are found in the HR diagram?

a. Upper right corner
b. Lower left corner
c. Upper left to lower right

A

b. Lower left corner

20
Q

What cycle do stars spend most of their time in?

a. White dwarf
b. Main sequence
c. Supergiant

A

b. Main sequence

21
Q

How do main sequence stars get their energy?

a. Helium fusion
b. Hydrogen fission
c. Helium fission

A

b. Hydrogen fission

22
Q

How does mass affect the rate at which main sequence stars move through their life cycle?

a. More massive the faster
b. More massive the slower
c. Smaller the faster

A

a. More massive the faster

23
Q

What happens when hydrogen fusion ceases?

a. Gravity compresses the core
b. Expansion into a giant
c. Helium begins nuclear fusion
d. All of the above

A

d. All of the above

24
Q

How long can you see the remains of a supernova explosion?

a. Thousands of years
b. Millions of years
c. Hundreds of years

A

b. Millions

25
Q

What can a supernova explosion in a cold dark nebula trigger?

a. Birth of new stars
b. Destruction of other stars
c. Formation of moons

A

a. Birth of new stars

26
Q

The balance between the force of gravity pushing in on a star and the force of fusion pushing out on a star keep the star stable - - What is this called?

a. standard candle
b. black hole
c. hydrostatic equilibrium

A

c. Hydrostatic equilibrium

27
Q

How long will the remains of a supernova explosion last?

a. Millions of years
b. about 100 years
c. a few years

A

a. Millions of years

28
Q

What did radio waves emitted by pulsars lead scientists to believe at one time?

a. The end of the world is coming
b. The radio signals were from aliens
c. The Pulsars were moving toward earth

A

b. The radio signals were from aliens

29
Q

How does moving at faster speeds affect time?

a. Slows it down
b. Has no affect
c. Speeds it up

A

a. Slows it down

30
Q

How is the mass of an object moving at the speed of light affected?

a. mass is not affected
b. It becomes less massive
c. It becomes infinitely massive

A

c. It becomes infinitely massive

31
Q

How does mass affect space time?

a. It creates light
b. It warps pace time resulting in the bending of light
c. all of the above

A

b. It warps pace time resulting in the bending of light

32
Q

If you apply General Readlitivity to a collapsing core of a star we find out that it’s gravity . .

a. releases light
b. can trap light
c. decrease Mass
d. unchanged

A

b. can trap light

33
Q 
Be able to label the HR diagram with the following locations:
Giants
White Dwarfs
Main Sequence Stars
Super giants
A

See Mrs. Krumpelman if need help

34
Q

What are the three properties of a black hole?

A

1) . Electrical charge
2) . Mass
3) . Angular momentum

Astronomy (10 decks)

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