All Free Everyday Science MCQs with Answers

• A. 4.2 light years
• B. 3.2 light years
• C. 2.4 light years
• D. 1.5 light years

Explanation: Proxima Centauri is the nearest known star to the Sun after the Sun itself, at about 4.24 light-years from Earth.

• A. Earth
• B. Venus
• C. Mercury
• D. Uranus

Explanation: Uranus has the lowest recorded atmospheric temperature among the planets, reaching about −224°C.

• A. Apehelion
• B. Astronomical
• C. Lopsided
• D. Astronomi

Explanation: Aphelion is the point in Earth’s elliptical orbit at which Earth is farthest from the Sun, occurring in early July.

• A. Proxima Centauri
• B. Alpha Scorpius
• C. Beta Orionis
• D. Vegetal

Explanation: Proxima Centauri is the nearest known star to the Sun, at about 4.24 light-years away.

• A. Venus between Earth and sun
• B. Moon is between Earth and sun
• C. Sun is between Earth and moon
• D. Moon is between Earth and Neptune

Explanation: A solar eclipse occurs when the Moon passes between the Sun and Earth and casts its shadow on Earth.

• A. Moon unit
• B. Light unit
• C. Astronomical unit
• D. Solar unit

Explanation: An astronomical unit, or AU, is the mean Earth-Sun distance, approximately 149.6 million kilometres.

• A. 4.3 Billion years
• B. 4.4 Billion years
• C. 4.5 Billion years
• D. None of these

Explanation: The solar system formed about 4.6 billion years ago, commonly rounded to approximately 4.5 billion years in general science questions.

• A. February
• B. January
• C. December
• D. April

Explanation: Earth is closest to the Sun at perihelion, which occurs in early January, despite the Northern Hemisphere experiencing winter then.

• A. HD1
• B. GN-z11
• C. Milky way
• D. None of these

Explanation: HD1 was reported in April 2022 as a candidate for the most distant and earliest known galaxy, with light dating to roughly 330 million…

• A. Uranus
• B. Venus
• C. Saturn
• D. Mercury

Explanation: Titan is Saturn's largest moon and the second-largest moon in the Solar System after Jupiter's Ganymede.

• A. Uranus
• B. Saturn
• C. Venus
• D. Mercury

Explanation: Venus is named after Venus, the Roman goddess of love and beauty. The other listed planets are named after male gods or figures.

• A. 22 December
• B. 23 September
• C. 21 June
• D. 22 March

Explanation: The Southern Hemisphere's winter begins around 21 June, when the Southern Hemisphere is tilted away from the Sun.

• A. 21 July
• B. 22 December
• C. 22 March
• D. 21 June

Explanation: Around 21 June, the Northern Hemisphere is tilted toward the Sun, producing its longest day and the summer solstice.

• A. Stars
• B. Galaxy
• C. Moon
• D. Planets.

Explanation: Selenology is the scientific study of the Moon, including its surface, composition, origin and geological history.

• A. Axis of rotation
• B. Equator
• C. North Pole
• D. South Pole

Explanation: The equator is an imaginary circle halfway between the poles and divides Earth into the Northern and Southern Hemispheres.

• A. Proxima Centurai
• B. Alpha Scorpii
• C. Beta Orionis
• D. Vega

Explanation: Proxima Centauri is the nearest known star to the Sun, at about 4.24 light-years away.

• A. Photoelectric emission
• B. Nuclear fission
• C. Nuclear fusion
• D. Thermionic emission

Explanation: In the Sun's core, hydrogen nuclei combine to form helium through nuclear fusion, releasing energy because a small amount of mass is…

• A. Mars
• B. Jupiter
• C. Mercury
• D. Neptune

Explanation: Mercury has the lowest surface gravity among these planets, about 3.7 m/s², narrowly below Mars.

• A. Blue
• B. White
• C. Red
• D. Black

Explanation: An astronaut in space sees a black sky because there is no atmosphere to scatter sunlight into different directions.

• A. 'Higgs boson particles' were detected.
• B. Gravitational waves' were detected.
• C. Possibility of inter-galactic space travel through 'wormhole' was confirmed.
• D. It enabled the scientists to understand 'singularity'.

Explanation: Merging black holes disturb spacetime and produce gravitational waves that can be detected on Earth.