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 the name of the first exoplanet confirmed orbiting a sun-like star?

51 Pegasi b (Dimidium)

HD 209458 b

Kepler-22b

TRAPPIST-1e

 Loading...

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

A deep-space observation platform near Mars

A privately owned space hotel

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

A moon base shared by the USA and China

 Loading...

3. 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...

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

Tycho Brahe

Galileo Galilei

Ptolemy

Nicolaus Copernicus

 Loading...

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

Mars

Neptune

Mercury

Venus

 Loading...

6. What is antimatter?

Matter that exists only in black holes

The substance making up dark matter

A hypothetical substance faster than light

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

 Loading...

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

Nuclear Fission

Gravitational Compression

Chemical Combustion

Nuclear Fusion

 Loading...

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

Paksat-MM1

Badr-1

Badr-B

Paksat-1

 Loading...

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

Uranus

Neptune

Saturn

Pluto

 Loading...

10. Which scientist proposed the General Theory of Relativity?

Max Planck

Isaac Newton

Niels Bohr

Albert Einstein

 Loading...

11. What is an Astronomical Unit (AU)?

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

A unit for measuring the brightness of stars

The distance light travels in one month

A unit for measuring the mass of stars

 Loading...

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

Pluto

Uranus

Saturn

Neptune

 Loading...

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

Venus

Mars

Mercury

Neptune

 Loading...

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

Isaac Newton

Johannes Kepler

Nicolaus Copernicus

Galileo Galilei

 Loading...

15. What is a "white dwarf"?

A small star with white coloured surface gas

A small, hot star newly formed from a nebula

A type of neutron star

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

 Loading...

16. What is Schrödinger's Cat?

A real experiment performed on a cat in space

A scientific theory about feline vision

The name of the first cat sent into orbit

A thought experiment illustrating the paradox of quantum superposition

 Loading...

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

Mars

Neptune

Uranus

Mercury

 Loading...

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

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

It captured the first image of a black hole

It showed the formation of the Solar System

It showed the surface of Pluto for the first time

 Loading...

19. 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

Bohr's Law

Kepler's First Law

Hubble's Law

 Loading...

20. What type of star is our Sun?

Red Giant

Neutron Star

Yellow Dwarf (G-type main-sequence star)

White Dwarf

 Loading...

21. What is the Greenhouse Effect?

The depletion of the ozone layer

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

 Loading...

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

Homi Bhabha

Abdul Salam

Vikram Sarabhai

A.P.J. Abdul Kalam

 Loading...

23. What is absolute zero?

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

-200°C — the temperature of liquid nitrogen

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

0°C — the freezing point of water

 Loading...

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

Jupiter

Mars

Venus

Mercury

 Loading...

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

200,000 km/s

340 m/s

150,000 km/s

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

 Loading...

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

Sagittarius A* (Sgr A*)

Cygnus X-1

TON 618

M87*

 Loading...

27. What is "Dark Matter"?

The dark regions between galaxies

Matter made of anti-particles

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

Matter that has turned into a black hole

 Loading...

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

Gravitational force

Centrifugal force

Nuclear force

Magnetic force

 Loading...

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

50–55 years

100 years

75–76 years

25–30 years

 Loading...

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

150 million km (1 AU)

200 million km

100 million km

300 million km

 Loading...

31. Who invented the telescope?

Isaac Newton

Hans Lippershey

Johannes Kepler

Galileo Galilei

 Loading...

32. What instrument is used to measure atmospheric pressure?

Thermometer

Anemometer

Barometer

Hygrometer

 Loading...

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

200 m/s

1,000 m/s

340 m/s (approximately)

3,000 m/s

 Loading...

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

Andromeda Galaxy

Milky Way Galaxy

Sombrero Galaxy

Triangulum Galaxy

 Loading...

35. What is SUPARCO?

A Pakistani telecommunications company

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

Pakistan's nuclear regulatory authority

The body overseeing Pakistan's satellite TV

 Loading...

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

Mars

Saturn

Earth

Jupiter

 Loading...

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

Uranus

Saturn

Neptune

Jupiter

 Loading...

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

Large Magellanic Cloud

Triangulum Galaxy (M33)

Andromeda Galaxy (M31)

Centaurus A

 Loading...

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

Saturn

Uranus

Neptune

Jupiter

 Loading...

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

James Webb Space Telescope

Kepler Space Telescope

Spitzer Space Telescope

Chandra X-ray Observatory

 Loading...

41. What is the Oort Cloud?

A cloud of gas around the Sun

A region of ice in the inner Solar System

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

The atmosphere of Jupiter

 Loading...

42. What are the four fundamental forces of nature?

Strong Nuclear, Weak Nuclear, Electromagnetic, Gravitational

Nuclear, Chemical, Thermal, Gravitational

Gravity, Friction, Tension, Normal Force

Magnetic, Electric, Gravitational, Kinetic

 Loading...

43. What is a "shooting star"?

A meteor burning up in Earth's atmosphere

A small comet passing near Earth

A star that has exploded

A satellite falling from orbit

 Loading...

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

Saturn

Jupiter

Uranus

Neptune

 Loading...

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

4.6 billion years ago

13.8 billion years ago

20 billion years ago

10 billion years ago

 Loading...

46. 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...

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

Spirit

Curiosity

Opportunity

Perseverance

 Loading...

48. What is the Hubble Space Telescope named after?

James Hubble

Walter Hubble

Edwin Hubble

George Hubble

 Loading...

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

Belka the dog

Gordo the squirrel monkey

Ham the chimpanzee

Laika the dog

 Loading...

50. What is a light-year?

The brightness of a star

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

The age of a star measured in years

The distance light travels in one year

 Loading...

51. What does a light-year measure?

Speed

Time

Distance

Brightness

 Loading...

52. 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 directly proportional to the square of the distance between them

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

Independent of their masses and dependent only on distance

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

 Loading...

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

Neil Armstrong

Buzz Aldrin

Alan Shepard

Yuri Gagarin

 Loading...

54. What is "Dark Energy"?

Radiation emitted by pulsars

The energy inside dark matter

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

 Loading...

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

4 minutes

15 minutes

1 minute 20 seconds

8 minutes 20 seconds

 Loading...

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

Quasar

Supernova

Pulsar

Nova

 Loading...

57. What is SpaceX and who founded it?

A Russian space agency; founded by Roscosmos

A joint US-European company; founded in 1995

A NASA division; founded by Bill Gates

A private aerospace company; founded by Elon Musk in 2002

 Loading...

58. What does NASA stand for?

National Astronomy and Space Agency

National Aeronautics and Space Administration

North American Space Association

National Aerospace Science Academy

 Loading...

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

Titan

Callisto

Io

Ganymede

 Loading...

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

Maxwell Montes (Venus)

Mount Everest (Earth)

Olympus Mons (Mars)

Mauna Kea (Earth)

 Loading...

61. What does E=mc² represent?

Electricity equals mass times distance squared

Entropy equals momentum times the speed of light squared

Energy equals mass times the speed of sound squared

Energy equals mass times the speed of light squared

 Loading...

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

The region of space between asteroids in the Asteroid Belt

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

The area near a black hole where matter orbits safely

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

 Loading...

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

A protective layer that reflects sunlight back into space

A layer of oxygen near Earth's surface

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

A layer of ozone in the lower atmosphere that traps heat

 Loading...

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

Hubble Space Telescope Programme

Chandra X-ray Observatory

Spitzer Space Telescope Programme

Kepler Space Telescope Programme

 Loading...

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

Mercury

Mars

Pluto

Venus

 Loading...

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

Ganymede

Europa

Io

Titan

 Loading...

67. What is a Pulsar?

A type of exploding star

A rapidly rotating neutron star that emits beams of electromagnetic radiation

A black hole that spins rapidly

A star that pulses in brightness

 Loading...

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

General Theory of Relativity

Quantum Mechanics

Classical Mechanics

String Theory

 Loading...

69. What is a nebula?

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

A cluster of dark matter

A black hole surrounded by light

A type of galaxy

 Loading...

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

Between Jupiter and Saturn

Between Earth and Mars

Between Mercury and Venus

Between Mars and Jupiter

 Loading...

71. What is the Doppler Effect?

The splitting of white light into a spectrum

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

 Loading...

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

Isaac Newton

Albert Einstein

Galileo Galilei

Johannes Kepler

 Loading...

73. What is a Quasar?

A small asteroid belt

A type of comet

A slow-moving neutron star

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

 Loading...

74. What is Hubble's Law?

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

All galaxies are moving towards each other

 Loading...

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

Vostok 1

Sputnik 1

Explorer 1

Luna 1

 Loading...

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

Corona

Photosphere

Chromosphere

Radiative Zone

 Loading...

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

Mars

Venus

Mercury

Jupiter

 Loading...

78. What is the unit of measurement for pressure?

Joule

Watt

Pascal

Newton

 Loading...

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

Core

Chromosphere

Photosphere

Corona

 Loading...

80. What are sunspots?

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

Burning patches on the Sun's surface

Holes in the Sun's corona

Nuclear explosions on the Sun's surface

 Loading...

81. What is the Chandrasekhar Limit?

The minimum temperature required for nuclear fusion

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

The speed limit of objects in a black hole

The maximum distance light can travel in the Universe

 Loading...

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

Troposphere

Stratosphere

Thermosphere

Mesosphere

 Loading...

83. 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...

84. Why was Pluto reclassified as a dwarf planet?

It was discovered to be a captured asteroid

It is smaller than Earth's Moon

It was found to be made of gas, not rock

It has not cleared the neighbourhood of its orbit

 Loading...

85. What is a "red giant" star?

A very hot, small, dense 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

 Loading...

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

Buzz Aldrin

Yuri Gagarin

Alan Shepard

Neil Armstrong

 Loading...

87. What is a comet primarily composed of?

Iron and nickel

Ice, dust, and rocky material

Rock and gas

Liquid hydrogen

 Loading...

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

The edge of the black hole's magnetic field

The spinning disc of matter around a black hole

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...

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

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

Radiation from distant quasars

Radiation from the Sun's corona

Radiation emitted by dark matter

 Loading...

90. What is the chemical composition of water?

H₂SO₄

H₂O

NaCl

CO₂

 Loading...

91. What are the four Galilean moons of Jupiter?

Miranda, Ariel, Umbriel, Titania

Titan, Rhea, Dione, Tethys

Io, Europa, Ganymede, Callisto

Phobos, Deimos, Europa, Titan

 Loading...

92. What is a neutron star?

A newly formed star before it begins nuclear fusion

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

A star with neutral electric charge

A star composed entirely of hydrogen neutrons

 Loading...

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

Proxima Centauri

Alpha Centauri A

Betelgeuse

Sirius

 Loading...

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

Pioneer 10

Voyager 2

New Horizons

Voyager 1

 Loading...

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

Columbia

Challenger

Discovery

Atlantis

 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
• >>