Welcome to the Dark Matter and Dark Energy MCQs with Answers. In this post, we are sharing Dark Matter and Dark Energy Multiple Choice Questions and Answers in Astronomy section for various competitive exams in Pakistan. Each question offers a chance to enhance your knowledge regarding Dark Matter and Dark Energy online MCQs Test.
What is dark matter thought to be made of?
a) Ordinary atoms
b) Exotic particles not yet detected
c) Photons
d) Neutrinos
Which of the following provides evidence for the existence of dark matter?
a) Gravitational lensing
b) Radio waves from distant galaxies
c) Cosmic microwave background radiation
d) Solar wind measurements
What percentage of the universe’s total mass-energy is made up of dark matter?
a) 5%
b) 27%
c) 68%
d) 90%
What is one of the main functions of dark energy in the universe?
a) It causes the universe to contract
b) It is responsible for the expansion of the universe
c) It forms the galaxies
d) It affects the solar system’s orbits
How was the existence of dark energy first inferred?
a) From the movement of stars
b) From the acceleration of the universe’s expansion
c) From cosmic rays
d) From the discovery of black holes
What technique is used to map dark matter in the universe?
a) X-ray imaging
b) Gravitational lensing
c) Infrared observations
d) Gamma-ray bursts
Dark energy is thought to make up what percentage of the universe?
a) 5%
b) 27%
c) 50%
d) 68%
Which term is often used to describe the force of dark energy?
a) Electromagnetic force
b) Cosmic acceleration
c) Gravitational force
d) Nuclear force
Which of the following is a candidate for dark matter particles?
a) WIMPs (Weakly Interacting Massive Particles)
b) Neutrons
c) Protons
d) Alpha particles
What is a common characteristic of dark matter?
a) It absorbs light
b) It interacts very weakly with ordinary matter
c) It emits large amounts of radiation
d) It forms stars
What was one of the first pieces of evidence for dark matter?
a) The movement of galaxies in clusters
b) The discovery of the Higgs boson
c) The detection of cosmic rays
d) The orbit of planets
Which experiment is designed to detect dark matter particles?
a) LHC (Large Hadron Collider)
b) Hubble Space Telescope
c) IceCube Neutrino Observatory
d) Xenon1T experiment
Which theory suggests that dark energy is related to the “cosmological constant”?
a) Newtonian gravity
b) Quantum field theory
c) Einstein’s general relativity
d) String theory
What is the current rate of expansion of the universe primarily attributed to?
a) Dark matter
b) Dark energy
c) Black holes
d) Ordinary matter
Which galaxy observation led to the idea of dark matter?
a) The rotation curves of spiral galaxies
b) The color variations in elliptical galaxies
c) The size of dwarf galaxies
d) The formation of star clusters
Which property of dark matter distinguishes it from ordinary matter?
a) It interacts through electromagnetic forces
b) It interacts only through gravity and possibly weak nuclear forces
c) It forms stars and planets
d) It is highly visible in the optical spectrum
What effect does dark matter have on galaxy clusters?
a) It slows down the formation of stars
b) It increases the visible mass in clusters
c) It provides additional gravity to hold clusters together
d) It accelerates the expansion of the universe
How is dark energy related to the “Big Rip” theory?
a) It will eventually collapse the universe
b) It will continue to accelerate the expansion of the universe, leading to a disintegration of all matter
c) It stabilizes the expansion of the universe
d) It leads to the creation of new stars and galaxies
Which of the following is true about dark matter?
a) It emits radiation detectable by telescopes
b) It interacts with electromagnetic radiation
c) It does not emit or absorb light
d) It is only found in our galaxy
How does dark matter affect cosmic microwave background radiation (CMB)?
a) It heats up the CMB
b) It bends the CMB via gravitational lensing
c) It absorbs the radiation
d) It changes the frequency of the CMB
Which phenomenon provides indirect evidence for dark energy?
a) The existence of black holes
b) The accelerating expansion of the universe
c) The cosmic microwave background
d) The formation of stars
What is one challenge in detecting dark matter?
a) It is extremely rare in the universe
b) It does not interact with ordinary matter in ways that are easy to detect
c) It moves faster than light
d) It is only found outside the Milky Way
Which type of galaxy cluster observation supports the existence of dark matter?
a) The distribution of visible stars
b) The total mass of galaxy clusters exceeding the mass of visible matter
c) The rotation speed of planets in our solar system
d) The color of stars in the galaxy
How does dark energy differ from dark matter?
a) Dark energy affects only stars, while dark matter affects galaxies
b) Dark energy accelerates the universe’s expansion, while dark matter adds gravity
c) Dark matter emits light, while dark energy absorbs it
d) Both are the same and affect galaxies equally
Which field of physics is most involved in the study of dark energy?
a) Classical mechanics
b) Quantum mechanics
c) General relativity
d) Nuclear physics
How is dark matter detected in the early universe?
a) Through its effects on galaxy formation
b) By measuring the brightness of stars
c) By observing black holes
d) Through its effect on gravitational waves
What is one hypothesis about the nature of dark energy?
a) It is a form of antimatter
b) It is the energy of empty space
c) It is caused by black holes
d) It is a form of radiation
Which tool helps astronomers study the effects of dark matter on large scales?
a) Hubble Space Telescope
b) Gravitational lensing
c) Gamma-ray bursts
d) Pulsar timing
How does dark energy impact the future of the universe?
a) It will slow down the expansion
b) It will stop the expansion eventually
c) It will cause the universe to expand forever at an accelerating rate
d) It will lead to the formation of more galaxies
What is a potential effect of dark matter on the formation of galaxies?
a) It prevents galaxy formation
b) It adds mass that helps galaxies form and hold together
c) It heats up stars
d) It increases the rotation speed of individual stars
Which technique is used to measure the amount of dark energy in the universe?
a) Redshift surveys
b) Neutrino detection
c) Solar flare measurements
d) Cosmic ray observations
Which term describes the mysterious repulsive force linked to dark energy?
a) Cosmological constant
b) Weak nuclear force
c) Electromagnetic field
d) String force
Why is dark matter important for understanding the universe?
a) It provides the heat necessary for stars
b) It generates gravitational effects that shape galaxies and structures
c) It slows down the expansion of the universe
d) It emits radiation that we can detect easily
Which type of cosmological structure would not have formed without dark matter?
a) Black holes
b) Neutron stars
c) Large-scale cosmic structures like galaxy clusters
d) Planetary systems
What role does dark matter play in the Bullet Cluster?
a) It causes the stars to shine more brightly
b) It demonstrates dark matter through gravitational lensing of colliding galaxy clusters
c) It increases the radiation output from the cluster
d) It slows the formation of stars
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