Stellar Evolution
Life Cycle of Stars Earth Science
Question 1
What is the main source of energy for a star on the main sequence?
a) Gravitational contraction
b) Nuclear fission
c) Nuclear fusion
d) Chemical reactions
Question 2
What is the primary factor determining the final stage of a star's life?
a) Its age
b) Its mass
c) Its composition
d) Its temperature
Question 3
What is the initial name of pre-stars following nebula?
a) photo star
b) pluto star
c) proto star
d) moto star
Question 4
Which of the following statements is true about a neutron star?
a) It came from the planet Krypton along with Superman
b) It is primarily composed of hydrogen and helium.
c) It is the final stage of all stars.
d) It is supported by the pressure of tightly packed neutrons.
Question 5
When a star runs out of hydrogen fuel in its core, what happens next?
a) The star collapses into a black hole.
b) The star explodes in a supernova.
c) The star expands into a red giant.
d) The star remains stable and its temperature decreases.
Question 6
In the red giant phase of a star's evolution, what happens to the core temperature and pressure?
a) Both temperature and pressure decrease.
b) Both temperature and pressure increase.
c) Temperature increases, pressure decreases.
d) Temperature decreases, pressure increases.
Question 7
What is the main source of energy for main sequence stars?
a) Hydrogen and helium fusion in the core
b) Shell burning of alcohol
c) Iron fusion in the core
d) Gravitational collapse
Question 8
What happens to the Sun after the white dwarf stage?
a) It will explode in a supernova.
b) It will continue to cool down and eventually become a black hole.
c) It will continue to cool down indefinitely.
d) It will reignite nuclear fusion in its core.
Question 9
What is the main reason for NASA's Gateway program?
a) Build a space station around mars
b) Build a space station around the moon
c) Let kids eat spaghetti noodles
d) Spend billions to brag
Question 10
Core of a high mass star gets much _________________ than a low mass star.
colder
softer
hotter
Question 11
____________ mass stars will be left with a core made of iron (Fe).
Low
High
Question 12
Nickel, copper, Silver, Zinc, and Gold are forged out in __________.
neutron stars
super giants
supernova
protostars
Question 13
Low mass stars leave behind _________________.
neutron stars
white dwarfs
planetary nebula
Question 14
High mass stars leave behind _____________
neutron stars or black holes
planetary nebula
protostars
stellar nebula