World Universe Science Information Online Test (World General Knowledge) Updated

The Universe and Science section is one of the most important and frequently tested areas in Pakistan’s top competitive examinations, including CSS (Central Superior Services), PMS (Provincial Management Services), NTS (National Testing Service), PPSC (Punjab Public Service Commission), FPSC (Federal Public Service Commission), SPSC, and KPPSC. Questions on the universe, solar system, planets, stars, galaxies, space exploration, laws of physics, inventions, scientific discoveries, and scientists regularly appear in General Knowledge, Everyday Science, and Current Affairs papers. A strong grasp of this topic can be a major score booster for any competitive exam aspirant. This carefully crafted MCQ set for GoTest.com.pk covers every critical angle of Universe and Science — the Big Bang Theory, structure of the solar system, properties of planets, space missions, famous scientists and their discoveries, laws of motion, speed of light, black holes, galaxies, satellites, and much more. Each question is paired with a comprehensive explanation to help you understand the concept in depth, not just memorise the answer. Students are strongly advised to read every explanation carefully after checking their answer, as examiners often use slightly twisted phrasing to test deeper understanding. Thorough practice with these MCQs will build both your confidence and your conceptual clarity for exam day. Best of luck!

World Universe Science Information Online Test (World General Knowledge) Updated

Please wait...

1. What is Schrödinger's Cat?

A thought experiment illustrating the paradox of quantum superposition

A real experiment performed on a cat in space

A scientific theory about feline vision

The name of the first cat sent into orbit

 Loading...

2. What is a "red giant" star?

A large, cool star in a late stage of stellar evolution when a medium-mass star expands

A star in its early formation stage

A neutron star with a red glow

A very hot, small, dense star

 Loading...

3. What is the name of the deep-space observation programme that identified thousands of exoplanets?

Chandra X-ray Observatory

Kepler Space Telescope Programme

Spitzer Space Telescope Programme

Hubble Space Telescope Programme

 Loading...

4. What is the name of the supermassive black hole at the centre of the Milky Way Galaxy?

M87*

TON 618

Sagittarius A* (Sgr A*)

Cygnus X-1

 Loading...

5. What is the name of the nearest star to Earth (other than the Sun)?

Alpha Centauri A

Sirius

Proxima Centauri

Betelgeuse

 Loading...

6. What is the name of the galaxy in which our Solar System is located?

Milky Way Galaxy

Sombrero Galaxy

Triangulum Galaxy

Andromeda Galaxy

 Loading...

7. What is the Oort Cloud?

A region of ice in the inner Solar System

A cloud of gas around the Sun

The atmosphere of Jupiter

A spherical cloud of icy objects at the outermost edge of the Solar System, believed to be the source of long-period comets

 Loading...

8. What is the name of the largest moon of Saturn and the second largest moon in the Solar System?

Io

Titan

Ganymede

Europa

 Loading...

9. What is the Doppler Effect?

The change in frequency or wavelength of a wave relative to an observer moving relative to the wave source

The absorption of light by a black hole

The bending of light around massive objects

The splitting of white light into a spectrum

 Loading...

10. What does NASA stand for?

National Aerospace Science Academy

North American Space Association

National Aeronautics and Space Administration

National Astronomy and Space Agency

 Loading...

11. Which space probe was the first to leave the Solar System and enter interstellar space?

Voyager 2

Voyager 1

Pioneer 10

New Horizons

 Loading...

12. Which planet is known as the "Red Planet"?

Mercury

Jupiter

Mars

Venus

 Loading...

13. What is antimatter?

Matter that exists only in black holes

Matter composed of antiparticles, which have the same mass but opposite charge to normal particles

A hypothetical substance faster than light

The substance making up dark matter

 Loading...

14. What is the Milky Way's closest large galaxy neighbour?

Large Magellanic Cloud

Triangulum Galaxy (M33)

Centaurus A

Andromeda Galaxy (M31)

 Loading...

15. Who was the first person to observe the moons of Jupiter and support the heliocentric model with a telescope?

Nicolaus Copernicus

Isaac Newton

Galileo Galilei

Johannes Kepler

 Loading...

16. What does a light-year measure?

Brightness

Speed

Distance

Time

 Loading...

17. What type of star is our Sun?

Yellow Dwarf (G-type main-sequence star)

Neutron Star

Red Giant

White Dwarf

 Loading...

18. What is a Black Hole?

A region in space where gravity is so strong that not even light can escape

A dark region of space with no stars

A tunnel through space-time

A dead star that has turned completely dark

 Loading...

19. What is the approximate distance from the Earth to the Sun?

150 million km (1 AU)

300 million km

200 million km

100 million km

 Loading...

20. What is the unit of measurement for pressure?

Newton

Pascal

Watt

Joule

 Loading...

21. Which scientist proposed the General Theory of Relativity?

Niels Bohr

Isaac Newton

Max Planck

Albert Einstein

 Loading...

22. What is a "shooting star"?

A small comet passing near Earth

A satellite falling from orbit

A star that has exploded

A meteor burning up in Earth's atmosphere

 Loading...

23. What is a comet primarily composed of?

Rock and gas

Liquid hydrogen

Ice, dust, and rocky material

Iron and nickel

 Loading...

24. What is the name of the telescope launched in December 2021 that replaced the Hubble Space Telescope?

James Webb Space Telescope

Kepler Space Telescope

Chandra X-ray Observatory

Spitzer Space Telescope

 Loading...

25. What is "Dark Energy"?

Energy released by black holes

A hypothetical form of energy that permeates all of space and is responsible for the accelerating expansion of the Universe

The energy inside dark matter

Radiation emitted by pulsars

 Loading...

26. What does E=mc² represent?

Entropy equals momentum times the speed of light squared

Energy equals mass times the speed of light squared

Energy equals mass times the speed of sound squared

Electricity equals mass times distance squared

 Loading...

27. Who discovered the law of gravity, supposedly after observing an apple falling?

Albert Einstein

Isaac Newton

Galileo Galilei

Johannes Kepler

 Loading...

28. Which layer of the Sun is visible to us as its surface?

Chromosphere

Photosphere

Corona

Core

 Loading...

29. What is SpaceX and who founded it?

A private aerospace company; founded by Elon Musk in 2002

A Russian space agency; founded by Roscosmos

A NASA division; founded by Bill Gates

A joint US-European company; founded in 1995

 Loading...

30. What is a Quasar?

A slow-moving neutron star

A small asteroid belt

An extremely luminous active galactic nucleus powered by a supermassive black hole

A type of comet

 Loading...

31. What is a "white dwarf"?

A type of neutron star

The dense, hot remnant of a low-to-medium mass star after it has shed its outer layers

A small, hot star newly formed from a nebula

A small star with white coloured surface gas

 Loading...

32. Who was the first human to travel to outer space?

Buzz Aldrin

Yuri Gagarin

Alan Shepard

Neil Armstrong

 Loading...

33. What is Hubble's Law?

All galaxies are moving towards each other

Stars rotate around black holes at uniform speed

Galaxies are moving away from us at speeds proportional to their distance

The Universe is contracting at a constant rate

 Loading...

34. What is the name of Pakistan's first space satellite?

Paksat-MM1

Badr-B

Paksat-1

Badr-1

 Loading...

35. What is the International Space Station (ISS) and which countries are its main partners?

A moon base shared by the USA and China

An orbiting laboratory jointly operated by the USA, Russia, Europe, Japan, and Canada

A privately owned space hotel

A deep-space observation platform near Mars

 Loading...

36. What is the name of the first space shuttle launched by NASA?

Atlantis

Columbia

Challenger

Discovery

 Loading...

37. Which planet has a ring system most visible from Earth?

Jupiter

Saturn

Neptune

Uranus

 Loading...

38. Who was the first human to walk on the Moon?

Neil Armstrong

Yuri Gagarin

Alan Shepard

Buzz Aldrin

 Loading...

39. What is the outermost layer of the Sun called?

Chromosphere

Photosphere

Corona

Radiative Zone

 Loading...

40. What is the Event Horizon of a black hole?

The spinning disc of matter around a black hole

The edge of the black hole's magnetic field

The point of no return surrounding a black hole beyond which nothing can escape its gravity

The region where the black hole emits radiation

 Loading...

41. What is the name of the force that holds the nucleus of an atom together?

Gravitational force

Strong nuclear force

Electromagnetic force

Weak nuclear force

 Loading...

42. Isaac Newton's Law of Universal Gravitation states that every object in the universe attracts every other object with a force that is:

Directly proportional to their masses and inversely proportional to the square of the distance between them

Independent of their masses and dependent only on distance

Directly proportional to their masses and directly proportional to the square of the distance between them

Inversely proportional to their masses and directly proportional to the distance between them

 Loading...

43. What is the Asteroid Belt and where is it located?

Between Mars and Jupiter

Between Jupiter and Saturn

Between Mercury and Venus

Between Earth and Mars

 Loading...

44. What is the name of the layer of Earth's atmosphere closest to the surface, where weather occurs?

Thermosphere

Troposphere

Stratosphere

Mesosphere

 Loading...

45. What is the phenomenon where a star explodes at the end of its life in a massive explosion?

Quasar

Nova

Pulsar

Supernova

 Loading...

46. What instrument is used to measure atmospheric pressure?

Hygrometer

Thermometer

Anemometer

Barometer

 Loading...

47. Which planet is known as the "Earth's Twin" due to its similar size?

Neptune

Mars

Venus

Mercury

 Loading...

48. What is the Hubble Space Telescope named after?

Edwin Hubble

Walter Hubble

George Hubble

James Hubble

 Loading...

49. What is the significance of the Hubble Deep Field image?

It showed the surface of Pluto for the first time

It captured the first image of a black hole

It showed the formation of the Solar System

It revealed thousands of galaxies in a tiny patch of sky, demonstrating the vastness of the Universe

 Loading...

50. Which planet has the most moons in our Solar System?

Jupiter

Uranus

Neptune

Saturn

 Loading...

51. What does the Cosmic Microwave Background (CMB) radiation represent?

Radiation from the Sun's corona

The thermal radiation left over from the early Universe shortly after the Big Bang

Radiation emitted by dark matter

Radiation from distant quasars

 Loading...

52. According to the Big Bang Theory, the Universe originated approximately how many years ago?

20 billion years ago

10 billion years ago

4.6 billion years ago

13.8 billion years ago

 Loading...

53. Why was Pluto reclassified as a dwarf planet?

It was discovered to be a captured asteroid

It was found to be made of gas, not rock

It has not cleared the neighbourhood of its orbit

It is smaller than Earth's Moon

 Loading...

54. What is an Astronomical Unit (AU)?

A unit for measuring the mass of stars

A unit for measuring the brightness of stars

The distance light travels in one month

The average distance from the Earth to the Sun, approximately 150 million km

 Loading...

55. Halley's Comet is visible from Earth approximately every how many years?

25–30 years

100 years

50–55 years

75–76 years

 Loading...

56. Which is the largest moon in the Solar System?

Callisto

Ganymede

Io

Titan

 Loading...

57. Which is the smallest planet in our Solar System?

Mercury

Pluto

Venus

Mars

 Loading...

58. What is the name of the largest volcano in the Solar System?

Olympus Mons (Mars)

Mauna Kea (Earth)

Maxwell Montes (Venus)

Mount Everest (Earth)

 Loading...

59. Who is known as the "Father of the Indian Space Programme" and also contributed to Pakistan's SUPARCO?

Vikram Sarabhai

Abdul Salam

Homi Bhabha

A.P.J. Abdul Kalam

 Loading...

60. What is the chemical composition of water?

H₂SO₄

H₂O

NaCl

CO₂

 Loading...

61. Which planet has the shortest day (fastest rotation) in the Solar System?

Saturn

Jupiter

Mars

Earth

 Loading...

62. What is the name of the first exoplanet confirmed orbiting a sun-like star?

51 Pegasi b (Dimidium)

Kepler-22b

HD 209458 b

TRAPPIST-1e

 Loading...

63. What are sunspots?

Holes in the Sun's corona

Burning patches on the Sun's surface

Temporary cooler regions on the Sun's photosphere caused by intense magnetic activity

Nuclear explosions on the Sun's surface

 Loading...

64. What is the TRAPPIST-1 system famous for?

Being the first system where a supernova was observed

Having the largest known black hole

Being the closest star system to Earth

Containing seven Earth-sized planets, three of which may be in the habitable zone

 Loading...

65. Which is the largest planet in our Solar System?

Saturn

Jupiter

Uranus

Neptune

 Loading...

66. What is a light-year?

The distance light travels in one year

The age of a star measured in years

The time it takes light to travel from the Sun to Earth

The brightness of a star

 Loading...

67. What is a neutron star?

A star composed entirely of hydrogen neutrons

A newly formed star before it begins nuclear fusion

A star with neutral electric charge

The extremely dense remnant of a massive star after a supernova, composed almost entirely of neutrons

 Loading...

68. What is absolute zero?

-273.15°C (0 Kelvin) — the theoretical lowest possible temperature

0°C — the freezing point of water

-100°C — the coldest temperature in the Solar System

-200°C — the temperature of liquid nitrogen

 Loading...

69. What is the Chandrasekhar Limit?

The minimum temperature required for nuclear fusion

The maximum distance light can travel in the Universe

The speed limit of objects in a black hole

The maximum mass a white dwarf star can have before collapsing into a neutron star or black hole

 Loading...

70. What is the speed of sound in air at room temperature?

340 m/s (approximately)

3,000 m/s

200 m/s

1,000 m/s

 Loading...

71. Which planet is the hottest in our Solar System?

Mars

Jupiter

Mercury

Venus

 Loading...

72. What is SUPARCO?

A Pakistani telecommunications company

Pakistan's national space agency (Space and Upper Atmosphere Research Commission)

The body overseeing Pakistan's satellite TV

Pakistan's nuclear regulatory authority

 Loading...

73. What is a Pulsar?

A rapidly rotating neutron star that emits beams of electromagnetic radiation

A star that pulses in brightness

A type of exploding star

A black hole that spins rapidly

 Loading...

74. What is the speed of light in a vacuum?

299,792 km/s (approximately 3 × 10⁸ m/s)

150,000 km/s

340 m/s

200,000 km/s

 Loading...

75. What are the four Galilean moons of Jupiter?

Titan, Rhea, Dione, Tethys

Io, Europa, Ganymede, Callisto

Miranda, Ariel, Umbriel, Titania

Phobos, Deimos, Europa, Titan

 Loading...

76. What is the name of the theory that describes the behaviour of matter and energy at the smallest scales (subatomic level)?

Quantum Mechanics

Classical Mechanics

General Theory of Relativity

String Theory

 Loading...

77. What is a nebula?

A cluster of dark matter

A type of galaxy

A cloud of gas and dust in space that is often a region of star formation

A black hole surrounded by light

 Loading...

78. What was the name of the first artificial satellite launched into space?

Luna 1

Vostok 1

Sputnik 1

Explorer 1

 Loading...

79. What is the Greenhouse Effect?

The process by which plants produce oxygen

The cooling of Earth's atmosphere by clouds

The warming of Earth's surface due to the trapping of heat by atmospheric gases

The depletion of the ozone layer

 Loading...

80. Who proposed the heliocentric model of the Solar System?

Ptolemy

Nicolaus Copernicus

Galileo Galilei

Tycho Brahe

 Loading...

81. Which planet rotates on its side with an axial tilt of about 98 degrees?

Saturn

Neptune

Uranus

Pluto

 Loading...

82. What is the name of NASA's Mars rover that landed in February 2021?

Perseverance

Opportunity

Spirit

Curiosity

 Loading...

83. What is "Dark Matter"?

A hypothetical form of matter that does not interact with electromagnetic radiation but exerts gravitational effects

Matter that has turned into a black hole

The dark regions between galaxies

Matter made of anti-particles

 Loading...

84. What is the "Goldilocks Zone" (Habitable Zone) in astronomy?

The orbital region around a star where liquid water could exist on a planet's surface

The region of space between asteroids in the Asteroid Belt

The area near a black hole where matter orbits safely

The zone in a galaxy where stars are most likely to form

 Loading...

85. Which law states that the orbit of each planet is an ellipse with the Sun at one of the two foci?

Newton's First Law

Hubble's Law

Bohr's Law

Kepler's First Law

 Loading...

86. Which planet is farthest from the Sun in our Solar System?

Neptune

Saturn

Pluto

Uranus

 Loading...

87. Which planet has the longest day in the Solar System?

Neptune

Mars

Venus

Mercury

 Loading...

88. What is the name of the force that keeps planets in orbit around the Sun?

Nuclear force

Gravitational force

Centrifugal force

Magnetic force

 Loading...

89. What is the name of the first animal to orbit Earth in space?

Laika the dog

Belka the dog

Gordo the squirrel monkey

Ham the chimpanzee

 Loading...

90. What is the Ozone Layer and why is it important?

A protective layer that reflects sunlight back into space

A layer of ozone in the lower atmosphere that traps heat

A layer in the stratosphere that absorbs most of the Sun's harmful ultraviolet (UV) radiation

A layer of oxygen near Earth's surface

 Loading...

91. What are the four fundamental forces of nature?

Nuclear, Chemical, Thermal, Gravitational

Magnetic, Electric, Gravitational, Kinetic

Strong Nuclear, Weak Nuclear, Electromagnetic, Gravitational

Gravity, Friction, Tension, Normal Force

 Loading...

92. Who invented the telescope?

Isaac Newton

Galileo Galilei

Johannes Kepler

Hans Lippershey

 Loading...

93. How long does it take light from the Sun to reach Earth?

15 minutes

1 minute 20 seconds

8 minutes 20 seconds

4 minutes

 Loading...

94. Which planet experiences the most extreme temperature variation in the Solar System?

Mercury

Uranus

Neptune

Mars

 Loading...

95. What is the process by which the Sun produces energy?

Gravitational Compression

Nuclear Fission

Nuclear Fusion

Chemical Combustion

 Loading...

 Loading...

• <<
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• 51
• 52
• 53
• 54
• 55
• 56
• 57
• 58
• 59
• 60
• 61
• 62
• 63
• 64
• 65
• 66
• 67
• 68
• 69
• 70
• 71
• 72
• 73
• 74
• 75
• 76
• 77
• 78
• 79
• 80
• 81
• 82
• 83
• 84
• 85
• 86
• 87
• 88
• 89
• 90
• 91
• 92
• 93
• 94
• 95
• >>