General Science MCQs – Solar System (Job Test Preparation in Pakistan)
Which planet is closest to the Sun?
Mercury is the closest planet to the Sun, orbiting at an average distance of about 57.9 million kilometers.
Which planet is known as the Red Planet?
Mars is called the Red Planet due to its reddish appearance, caused by iron oxide (rust) on its surface.
Which planet is the largest in our solar system?
Jupiter is the largest planet in our solar system, with a diameter of about 142,984 kilometers.
Which planet has a ring system?
Saturn is famous for its prominent and extensive ring system, made mostly of ice and rock particles.
Which planet is known as the Morning Star?
Venus is often called the Morning Star or Evening Star because it is visible just before sunrise or after sunset.
Which planet is famous for the Great Red Spot?
Jupiter's Great Red Spot is a massive storm that has been raging for at least 400 years.
Which planet has the most moons?
Jupiter has the most moons, with over 80 known natural satellites.
Which planet is farthest from the Sun?
Neptune is the farthest planet from the Sun, orbiting at an average distance of about 4.5 billion kilometers.
What is the smallest planet in the solar system?
Mercury is the smallest planet in the solar system, with a diameter of about 4,880 kilometers.
Which planet has the longest day?
Venus has the longest day of any planet in our solar system, taking about 243 Earth days to rotate once.
Largest moon of Saturn is?
Titan is the largest moon of Saturn and the second-largest moon in the solar system.
Second largest planet in the solar system is?
Saturn is the second-largest planet in the solar system, after Jupiter.
Which planet has the shortest year?
Mercury has the shortest year, completing an orbit around the Sun in just 88 Earth days.
Which planet is called Earth’s twin?
Venus is often called Earth’s twin due to its similar size, mass, and composition.
Which planet rotates on its side?
Uranus rotates on its side, with an axial tilt of about 98 degrees.
Which planet has the strongest winds?
Neptune has the strongest winds in the solar system, reaching speeds of over 2,000 kilometers per hour.
Which planet is known for its blue color?
Neptune is known for its vivid blue color, caused by the presence of methane in its atmosphere.
Planets that do not have moons are?
Mercury and Venus are the only planets in the solar system without any natural satellites (moons).
Which planet has the highest mountain?
Mars is home to Olympus Mons, the highest mountain in the solar system, standing about 21.9 kilometers tall.
The outermost layer of the Sun is called?
The Sun's outermost layer is called the corona, which extends millions of kilometers into space.
The bright tail of a comet is formed by?
The bright tail of a comet is formed by solar radiation vaporizing the comet's ice and dust.
Which planet is tilted almost 90 degrees?
Uranus is tilted almost 90 degrees, causing it to rotate on its side.
The region beyond Neptune filled with icy bodies is called?
The Kuiper belt is a region beyond Neptune filled with icy bodies and dwarf planets.
Which is the hottest planet?
Venus is the hottest planet, with surface temperatures reaching up to 465°C due to its thick greenhouse atmosphere.
The Sun mainly consists of?
The Sun is primarily composed of hydrogen (about 73%) and helium (about 25%).
Which planet has the slowest rotation?
Venus has the slowest rotation, taking about 243 Earth days to complete one rotation.
The rocky objects mostly found between Mars and Jupiter are?
The asteroid belt is a region between Mars and Jupiter filled with rocky objects called asteroids.
The movement of planets around the Sun is called?
The movement of planets around the Sun is called revolution, while rotation refers to a planet spinning on its axis.
Which planet has polar ice caps?
Mars has polar ice caps composed of water ice and frozen carbon dioxide.
The time Earth takes to complete one rotation is?
Earth takes approximately 24 hours to complete one rotation on its axis.
Which planet has the most tilted orbit?
Pluto has the most tilted orbit, with an inclination of about 17 degrees relative to the plane of the solar system.
The natural satellite of Earth is called?
The Moon is Earth's only natural satellite, orbiting at an average distance of 384,400 kilometers.
A group of stars forming a pattern is called?
A constellation is a group of stars that form a recognizable pattern in the night sky.
Which planet has the brightest appearance from Earth?
Venus is the brightest planet as seen from Earth, due to its thick, reflective cloud cover.
The point in orbit closest to the Sun is called?
Perihelion is the point in a planet's orbit where it is closest to the Sun.
Which planet has no solid surface?
Jupiter is a gas giant and does not have a solid surface.
The dwarf planet once considered the 9th planet is?
Pluto was considered the 9th planet until 2006, when it was reclassified as a dwarf planet.
Which planet has the thickest atmosphere?
Venus has the thickest atmosphere of any terrestrial planet, composed mainly of carbon dioxide.
The time Earth takes to orbit the Sun is?
Earth takes about 365.25 days to complete one orbit around the Sun, which defines a year.
Which planet has a surface pressure 90 times Earth?
Venus has a surface pressure about 90 times that of Earth, due to its dense atmosphere.
The coldest planet in the solar system is?
Uranus is the coldest planet, with minimum temperatures dropping to -224°C.
Which gas is most common on Jupiter?
Jupiter is primarily composed of hydrogen (about 90%) and helium (about 10%).
Which planet has 27 known moons?
Uranus has 27 known moons, each named after characters from the works of William Shakespeare and Alexander Pope.
Which two planets take more than 80 Earth years to orbit the Sun?
Uranus takes 84 Earth years, and Neptune takes 165 Earth years to orbit the Sun.