Stars (life and death) Flashcards
What is the shell or edge of a black hole where light can no longer escape?
Event Horizon
What may have formed the early universe?
Primordial black holes
What is the spinning neutron star?
Pulsar
What is the type of star formed when massive stars explode their remnant cores become highly compressed clumps of neutrons?
Neutron stars
What is a high mass of star dies violently by blowing themselves apart in these explosions?
Supernova
What is it when the helium core of a “dying” star begins to rapidly fuse and forms carbon and oxygen?
Helium Flash
What does the burned out core of a low mass star become?
White Dwarf
What are the type of explosions of low mass stars before they expand into a planetary nedula?
Nova
What is the dust and gas that stars are formed out of?
Nebula
What is it called when hydrogen atoms collide together to form helium and a huge amount of energy?
Nuclear fussion
What is the chart that was created by Hertzsprung and Russell and was used to categorize stars by their size and brightness?
H.R. diagram
What is the balance between the force of gravity pushing the star in and the energy from the fusion pushing out?
Hydrostatic equilibrium
What produces energy from stars?
a. Super nova explosions
b. Nuclear fission
c. Nuclear fusion
c. Nuclear fusion
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
b. Tells us about the temperature of the star
What is the color of the hottest star?
a. Blue
b. Red
c. Green
a. Blue
What color is the coolest stars?
a. Blue
b. Red
c. Green
b. Red
Where are main sequence stars located on the HR diagram?
a. Upper right corner
b. Lower left corner
c. Upper left to lower right
c. Upper left to lower right
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. Upper right corner
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
b. Lower left corner
What cycle do stars spend most of their time in?
a. White dwarf
b. Main sequence
c. Supergiant
b. Main sequence
How do main sequence stars get their energy?
a. Helium fusion
b. Hydrogen fission
c. Helium fission
b. Hydrogen fission
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. More massive the faster
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
d. All of the above
How long can you see the remains of a supernova explosion?
a. Thousands of years
b. Millions of years
c. Hundreds of years
b. Millions
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. Birth of new stars
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
c. Hydrostatic equilibrium
How long will the remains of a supernova explosion last?
a. Millions of years
b. about 100 years
c. a few years
a. Millions of years
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
b. The radio signals were from aliens
How does moving at faster speeds affect time?
a. Slows it down
b. Has no affect
c. Speeds it up
a. Slows it down
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
c. It becomes infinitely massive
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
b. It warps pace time resulting in the bending of light
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
b. can trap light
Be able to label the HR diagram with the following locations: Giants White Dwarfs Main Sequence Stars Super giants
See Mrs. Krumpelman if need help
What are the three properties of a black hole?
1) . Electrical charge
2) . Mass
3) . Angular momentum
