All Free Everyday Science MCQs with Answers

• A. 14.8 days
• B. 17.5 days
• C. 29.7 days
• D. 27.3 days

Explanation: The Moon takes about 27.3 days to rotate once on its axis, equal to its sidereal orbital period around Earth.

• A. 29
• B. 30
• C. 40
• D. None of These

Explanation: The Artemis Accords reached 40 signatory countries in May 2024, setting shared principles for peaceful and sustainable exploration of the…

• A. Comets
• B. UV light
• C. Meteoroids
• D. All of the above

Explanation: Meteoroids continually strike the Moon and form many of its craters because the Moon has no substantial atmosphere to burn them up.

• A. Gegolith
• B. Megolith
• C. Regolith
• D. None of the above

Explanation: Regolith is the loose, powdery layer of dust and broken rock covering the Moon’s surface, produced mainly by countless meteorite impacts.

• A. Saturn and Jupiter
• B. Jupiter and Neptune
• C. Saturn, Jupiter and Mercury
• D. Venus and Uranus Chemistry

Explanation: Venus and Uranus have retrograde rotation, meaning they spin opposite to the usual direction of planetary rotation.

• A. Metal
• B. Rock
• C. Both A and B
• D. None of the above

Explanation: Terrestrial planets have solid surfaces and are composed mainly of silicate rock with metallic cores.

• A. Inner planets (Mercury, Venus, Earth, and Mars)
• B. Outer planets (Jupiter, Saturn, Uranus, and Neptune)
• C. Inner planets (Mercury, Venus) and outer planets (Uranus, Neptune)
• D. Inner planets (Earth, Mars) and outer planets (Jupiter, Saturn)Astronomy

Explanation: The terrestrial planets are the four inner planets, Mercury, Venus, Earth and Mars.

• A. 10
• B. 11
• C. 12
• D. 13

Explanation: Sunspot activity rises and falls in an approximately 11-year cycle, with periods of solar maximum and solar minimum.

• A. the photosphere, the leutosphere , and the corona
• B. the photosphere, the chromosphere, and the scislophere
• C. the photosphere, the chromosphere, and the corona
• D. None of the above

Explanation: The commonly identified visible layers of the Sun’s atmosphere are the photosphere, chromosphere and corona.

• A. Cromosphere
• B. Leutosphere
• C. Thermosphere
• D. Photosphere

Explanation: The photosphere is the bright visible surface from which most of the Sun’s light appears to come. The chromosphere and corona lie above it.

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

Explanation: The Sun is a star whose gravity holds the planets and other bodies in the solar system in orbit. It lies at the system’s centre.

• A. Coach
• B. Core
• C. Corona
• D. Comma

Explanation: The corona is the Sun’s extremely hot, thin outer atmosphere, extending millions of kilometres into space.

• A. 105
• B. 107
• C. 109
• D. 111

Explanation: The Sun’s diameter is about 109 times Earth’s diameter, although its volume is roughly 1.3 million Earths.

• A. The sun
• B. The Moon
• C. The Earth
• D. Venus

Explanation: Comets are icy bodies that orbit the Sun, usually on highly elongated paths.

• A. Crust
• B. Mental
• C. Core
• D. None of these

Explanation: The crust is Earth’s thin, rigid outermost layer, lying above the mantle and core.

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

Explanation: Saturn currently has the greatest number of confirmed moons in the solar system.

• A. Apollo 1
• B. Sputnik
• C. Apollo II
• D. Voyager 1

Explanation: Voyager 1 crossed the heliopause and entered interstellar space in 2012, making it the first human-made object to do so.

• A. Paresh Dhawan Space Centre
• B. Satish Dhawan Space Centre
• C. Ram Dhawan Space Centre
• D. Shiri Dhawan Space Centre

Explanation: Chandrayaan-3 was launched from the Satish Dhawan Space Centre at Sriharikota, India.

• A. Outer planets (Uranus and Neptune)
• B. Outer planets (Jupiter and Neptune)
• C. Outer planets (Jupiter and Saturn)
• D. Inner planets (Mercury and Earth)

Explanation: Uranus and Neptune are called ice giants because their interiors contain large amounts of water, ammonia and methane ices.

• A. Water, mercury and methane
• B. Water, ammonia and mercury
• C. Water, plasma and methane
• D. Water, ammonia and methane

Explanation: The principal volatile materials in the ice giants are water, ammonia and methane.