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Dark Matter and Dark Energy MCQs with Answers

Dark Matter and Dark Energy MCQs

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

Answer
b) Exotic particles not yet detected

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

Answer
a) Gravitational lensing

What percentage of the universe’s total mass-energy is made up of dark matter?
a) 5%
b) 27%
c) 68%
d) 90%

Answer
b) 27%

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

Answer
b) It is responsible for the expansion of the universe

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

Answer
b) From the acceleration of the universe’s expansion

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

Answer
b) Gravitational lensing

Dark energy is thought to make up what percentage of the universe?
a) 5%
b) 27%
c) 50%
d) 68%

Answer
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

Answer
b) Cosmic acceleration

Which of the following is a candidate for dark matter particles?
a) WIMPs (Weakly Interacting Massive Particles)
b) Neutrons
c) Protons
d) Alpha particles

Answer
a) WIMPs (Weakly Interacting Massive 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

Answer
b) It interacts very weakly with ordinary matter

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

Answer
a) The movement of galaxies in clusters

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

Answer
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

Answer
c) Einstein’s general relativity

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

Answer
b) Dark energy

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

Answer
a) The rotation curves of spiral galaxies

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

Answer
b) It interacts only through gravity and possibly weak nuclear forces

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

Answer
c) It provides additional gravity to hold clusters together

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

Answer
b) It will continue to accelerate the expansion of the universe, leading to a disintegration of all matter

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

Answer
c) It does not emit or absorb light

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

Answer
b) It bends the CMB via gravitational lensing

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

Answer
b) The accelerating expansion of the universe

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

Answer
b) It does not interact with ordinary matter in ways that are easy to detect

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

Answer
b) The total mass of galaxy clusters exceeding the mass of visible matter

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

Answer
b) Dark energy accelerates the universe’s expansion, while dark matter adds gravity

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

Answer
c) General relativity

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

Answer
a) Through its effects on galaxy formation

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

Answer
b) It is the energy of empty space

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

Answer
b) Gravitational lensing

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

Answer
c) It will cause the universe to expand forever at an accelerating rate

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

Answer
b) It adds mass that helps galaxies form and hold together

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

Answer
a) Redshift surveys

Which term describes the mysterious repulsive force linked to dark energy?
a) Cosmological constant
b) Weak nuclear force
c) Electromagnetic field
d) String force

Answer
a) Cosmological constant

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

Answer
b) It generates gravitational effects that shape galaxies and structures

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

Answer
c) Large-scale cosmic structures like galaxy clusters

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

Answer
b) It demonstrates dark matter through gravitational lensing of colliding galaxy clusters

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