All Free Everyday Science MCQs with Answers

161. The first and largest asteroid discovered was__________?

• A. Pallas
• B. Juno
• C. Ceres
• D. Trojan

Explanation: Ceres was the first asteroid discovered, in 1801, and it remains the largest object in the asteroid belt. It is now classified as a dwarf planet as well as a main-belt object.

162. which of the following planets has no moons ?

• A. Mars
• B. Neptune
• C. Venus
• D. None of these

Explanation: Venus has no natural moons, like Mercury. Mars has two moons, while Neptune has multiple moons.

163. A pulsar is actually a___________?

• A. Black hole
• B. White dwarf
• C. Red giant
• D. Neutron star

Explanation: A pulsar is a rapidly rotating neutron star whose beams of radiation sweep past Earth like a lighthouse. Its regular pulses distinguish it from a black hole, white dwarf or red giant.

164. The andromeda Galaxy is which type of the following types of galaxies ?

• A. Elliptical
• B. Spiral
• C. Irregular
• D. None of these.Biological Sciences

Explanation: The Andromeda Galaxy is a spiral galaxy, specifically a barred spiral classified as type Sb. Elliptical galaxies are more rounded and lack the prominent disk-and-arm structure of Andromeda.

165. The ________ system is the closest star system to our sun.?

• A. Promixa Centauri
• B. Alpha Centauri
• C. Red proxima Centauri
• D. None of these

Explanation: Alpha Centauri is the nearest star system to the Sun; Proxima Centauri is the nearest individual star within that system. The misspelled option refers only to Proxima, not the complete system.

166. How many planets in Solor Syestem?

• A. 4
• B. 5
• C. 6
• D. 8 Chemistry

Explanation: The Solar System has eight recognized planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Pluto is classified as a dwarf planet, not one of the eight planets.

167. Which planet is called "Lopsided planet" ?

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

Explanation: Uranus is called the lopsided planet because its axis is tilted about 98 degrees, making it rotate almost on its side. This extreme tilt also produces unusually long seasons.

168. What is the average distance of the moon from earth?

• A. 384,400 km
• B. 350,000 km
• C. 380,200 km
• D. 384,500 km

Explanation: The Moon’s mean distance from Earth is about 384,400 kilometres. Its orbit is elliptical, so the actual distance varies between roughly 356,500 and 406,700 kilometres.

169. Moon is the _______ satellite of the Earth?

• A. Natural
• B. Artificial
• C. Navigation
• D. None of these

Explanation: The Moon is a natural satellite because it occurs naturally and revolves around Earth. Artificial satellites are human-made objects launched into orbit.

170. Temperature of Sun in Celsius Scale is 6000ºC & in Fahrenheit is _____________?

• A. 8000 F
• B. 9000 F
• C. 10,832 F
• D. None of these

Explanation: Converting 6000°C gives 6000 × 9/5 + 32 = 10,832°F. The Fahrenheit value is higher because the Fahrenheit scale has both a different interval size and a different zero point.