WorksheetsStuySky Star Phases Quiz
Total questions: 15
Worksheet time: 8mins
Which spectral class of stars is the bluest and brightest?
B
O
A
K
Which spectral class of stars is the reddest and least bright?
O
F
G
M
Which spectral class of stars do most main sequence stars belong in?
K
O
G
M
What is the name of this diagram?
Henderson-Hasselbach Diagram
Hertzsprung-Russell diagram
Luminosity Index Diagram
Lagrange's Interpolation Diagram
Which of the following are true about protostars?
A protostar can fuse materials within its core
A protostar already has a protoplanetary disk
The previous stellar phase is a T-Tauri star
A protostar undergoes immense pressure due to increased volume
Why do low-mass stars typically stay on the Main Sequence for tens of billions to tens of trillions of years?
Their low mass but relatively high temperature are not conducive to the nuclear fusion of heavier elements
Their low-mass allows for the gravity to overcome their outward force, preventing a supernova from occurring
Their low mass and relatively low temperature contributes to a slower rate of nuclear fusion, so hydrogen and helium do not run out quickly
They don't typically stay on the Main Sequence for long due to having too little mass to maintain hydrostatic equilibrium
What will typically become of low-mass stars once they die?
Black hole
Red dwarf
Blue dwarf
Neutron star
Which of the following are true about medium-mass stars on the main sequence?
Between 0.5 to 8 solar masses
Spectral Class B to M
Live around 10-15 million years
3500-20,000K surface temperature
What does "shedding" refer to in the death of medium-mass stars?
The outer layers of the core get ejected and a supernova occurs
The star's massive size causes it to fragment, shedding the outer and inner layers of the core in the process
The star's atmosphere is eradicated, leaving behind a T-Tauri star.
The outer layers of the core expand and shred, forming a nebula and leaving behind a white core
Why do high-mass main sequence stars typically live short lives?
They easily form nebulae after undergoing shredding
They always become black holes after a few hundred million years
Their great mass and temperature causes them to run out of hydrogen and helium quickly
They constantly experience a disruption in hydrostatic equilibrium early in development due to their massive size
What is the heaviest element that a star can fuse before rapid core collapse?
Titanium
Iron
Carbon
Oxygen
How does a white dwarf form?
Electron degeneracy pressure from the contracted core squeezes the electrons together, which generates outward pressure due to Pauli Exclusion Principle
The outer core of the high-mass star undergoes shedding, forming a white dwarf
Once the star forms a nebula, the nebula itself undergoes shedding to form a white dwarf
The big mass of the star increases its luminosity until the star appears white
What happens if a high-mass star's core is too small to surpass electron degeneracy pressure...
NEUTRON STAR!!!!
YELLOW DWARF!!!!!
NEBULA!!!!
HAWKING RADIATION!!!
What happens if a high-mass star's core that is greater than 3 solar masses collapses....
BLACK HOLE!!!!
NEUTRON STAR!!!
DARK MATTER!!!!
GAMMA RAY BURST!!!
BONUS: What is Sophie's favorite food?
Kimchi ramen
Noodles in spicy beef soup
Miso soup
Mooncakes
