Astrophysics And Cosmology II - SS3 Physics Past Questions and Answers - page 2
What is the final stage in the life cycle of a high-mass star?
White dwarf
Neutron star
Black hole
Red giant
Planetary nebula
What happens to a low-mass star after it becomes a red giant?
It becomes a white dwarf
It explodes in a supernova
It collapses into a black hole
It becomes a neutron star
It sheds its outer layers and becomes a planetary nebula
What do we mean by “stellar evolution”?
Stellar evolution refers to the changes that occur in stars over the course of their lifetime. It is a long-term process that can take billions of years, depending on the size of the star.
What is the importance of stellar evaluation?
Stellar evolution is an important field of study in astrophysics because it provides insights into the nature of the universe and how it has evolved over time. It also helps us understand the formation of elements in the universe, including the elements that make up our own bodies.
Which of the following best describes the Big Bang theory?
The universe is expanding, and it began as a single point of infinite density and temperature.
The universe is infinite and eternal and has always existed in its current state.
The universe is constantly oscillating between expansion and contraction.
The universe was created by a supreme being in a single instant.
Which of the following pieces of evidence supports the Big Bang theory?
The cosmic microwave background radiation is observed to be uniformly distributed.
The abundance of light elements such as helium and hydrogen in the universe.
The observed redshift of galaxies in all directions.
All of the above.
Which of the following best describes dark matter?
Matter made up of particles that interact with electromagnetic radiation.
Matter made up of particles that do not interact with electromagnetic radiation, but do interact gravitationally.
Matter that is undetectable by any means.
Matter that only exists in the space between galaxies.
What is the main source of energy for stars?
Nuclear fusion reactions that convert hydrogen into helium.
Gravitational energy released as the star contracts.
Energy from the accretion of gas and dust in the early stages of the star's formation.
Chemical reactions between different elements in the star.
What is a supernova?
A type of black hole that forms when a massive star collapses.
The explosion of a white dwarf star.
The explosion of a massive star that has run out of fuel and can no longer support its own weight.
A type of neutron star that emits intense bursts of radiation.
What is cosmology?
Cosmology is the study of the origin, evolution, and structure of the universe. The Big Bang theory is the prevailing cosmological model that describes the early development of the universe.