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

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

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

Tags

NGSS.HS-ESS1-1

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

Tags

NGSS.HS-ESS1-3

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