Solar System MCQ Quiz in मल्याळम - Objective Question with Answer for Solar System - സൗജന്യ PDF ഡൗൺലോഡ് ചെയ്യുക

• Comets 
  • Comets are also members of our solar system. 
  • They revolve around the Sun in highly elliptical orbits. 
  • However, their period of revolution round the Sun is usually very long. A Comet appears generally as a bright head with a long tail. 
  • The length of the tail grows in size as it approaches the sun. 
  • The tail of a comet is always directed away from the sun. Many comets are known to appear periodically. 
  • One such comet is Halley’s comet, which appears after nearly every 76 years. It was last seen in 1986. 
• Meteors
  • The small pieces of rocks which move around the sun are called meteoroids.
  • Sometimes these meteoroids come near the earth and tend to drop upon it.
  • During this process due to friction with the air they get heated up and burn.
  • It causes a flash of light. Sometimes, a meteor without being completely burnt, falls on the earth and creates a hollow.
• Artificial satellites
  • Artificial satellites are man-made.
  • They are launched from the Earth. They revolve around the Earth much closer than earth’s natural satellite, the moon.
  • India has built and launched several artificial satellites. Aryabhata was the first Indian satellite. Some other Indian satellites are INSAT, IRS, Kalpana-1, EDUSAT, etc. 
  • Artificial satellites have many practical applications.
  • They are used for forecasting weather, transmitting television and radio signals. They are also used for telecommunication and remote sensing.

Concept :

• The Moon is the only satellite of our planet with a size nearly greater than our planet.
• It is a dry celestial body that has no atmosphere.
• So there is no air, and hence no wind on the Moon.
• We can see only one side of the moon from the Earth as the Moon's rotation is equal to its revolution.

Explanation :

• The moon is the earth's only natural satellite and the fifth largest moon in the solar system. 
• When the moon appears as a full disc, the whole side facing us gets lit up and is called Full Moon.
• When the Moon is on the opposite side of the Earth from the Sun, the bright side of the Moon is facing towards the Earth, and this is known as full moon day.
• The full moon is the lunar phase when the moon appears fully illuminated from the earth's surface.
• This occurs when the earth is located between the sun and the moon.

Additional Information

• The moon's distance from earth is about 240,000 miles ( 385,000 Km).
• The moon has a very thin atmosphere called an exosphere.
• Its surface is crated and pitted from a comet and has asteroid impressions.
• NASA currently has three robotic spacecraft exploring the moon.

        1) Lunar Reconnaissance orbiter

        2) ARTEMIS

        3) New ARTEMIS 

• It has no rings
• It is the only celestial body beyond earth so far visited by human beings.

Concept

• There are many planetary systems like ours in the universe, with planets orbiting a host star.
• Our planetary system is called “The solar system.”
• The word “solar” describes things related to our hot star.
• It comes from the Latin word "solis" Meaning Sun,
• The solar system is made up of the Sun, eight planets, satellites, and other celestial bodies.
• The solar system is huge, at least 100 astronomical units in size (15 trillion km).

Explanation

Eris:

• Eris is one of the largest known dwarf planets in our solar system.
• It's about the same size as Pluto.
• It is three times farther from the Sun.
• Eris is about 68 astronomical units away from the Sun.
• Eris was discovered on 5th January 2005.
• Eris is named after the ancient Greek goddess of discord and strife.
• Eris is a little smaller than Earth's Moon.
• Eris has a very small moon called Dysnomia.

Thus, Eris is a minor planet.

Additional Information

Mars:

• Mars is the fourth planet from the Sun.
• It is a dusty, cold, desert world.
• It has a very thin atmosphere.
• It is also a dynamic planet with seasons, polar ice caps, canyons, extinct volcanoes, etc.
• Mars is one of the most explored bodies in our solar system

Venus

• Venus is the second planet from the Sun.
• It is Earth’s closest planetary neighbor.
• It is often called Earth’s twin because it’s similar in size and density.
• Venus has a thick, toxic atmosphere filled with carbon dioxide.
• It is perpetually shrouded in thick, yellowish clouds of sulfuric acid that trap heat.
• It’s the hottest planet in our solar system.
• Venus has crushing air pressure at its surface.
• Venus rotates on its axis backward; the Sun rises in the west and sets in the east.

Jupiter

• Jupiter is Fifth in line from the Sun.
• It is the largest planet in the solar system.
• It is more than twice as massive as all the other planets combined.
• Jupiter's stripes and swirls are the cold, windy clouds of ammonia and water.
•  These are floating in an atmosphere of hydrogen and helium.
• Jupiter’s iconic Great Red Spot is a giant storm bigger than Earth.
• This storm has raged for hundreds of years.

Concept

• There are many planetary systems like ours in the universe, with planets orbiting a host star.
• Our planetary system is called “The solar system.”
• The word “solar” describes things related to our hot star.
• It comes from the Latin word "solis" Meaning Sun,
• The solar system is made up of the Sun, eight planets, satellites, and other celestial bodies.
• The solar system is huge, at least 100 astronomical units in size (15 trillion km).

Explanation

Eris:

• Eris is one of the largest known dwarf planets in our solar system.
• It's about the same size as Pluto.
• It is three times farther from the Sun.
• Eris is about 68 astronomical units away from the Sun.
• Eris was discovered on 5th January 2005.
• Eris is named after the ancient Greek goddess of discord and strife.
• Eris is a little smaller than Earth's Moon.
• Eris has a very small moon called Dysnomia.

Thus, Eris is a minor planet.

Additional Information

Mars:

• Mars is the fourth planet from the Sun.
• It is a dusty, cold, desert world.
• It has a very thin atmosphere.
• It is also a dynamic planet with seasons, polar ice caps, canyons, extinct volcanoes, etc.
• Mars is one of the most explored bodies in our solar system

Venus

• Venus is the second planet from the Sun.
• It is Earth’s closest planetary neighbor.
• It is often called Earth’s twin because it’s similar in size and density.
• Venus has a thick, toxic atmosphere filled with carbon dioxide.
• It is perpetually shrouded in thick, yellowish clouds of sulfuric acid that trap heat.
• It’s the hottest planet in our solar system.
• Venus has crushing air pressure at its surface.
• Venus rotates on its axis backward; the Sun rises in the west and sets in the east.

Jupiter

• Jupiter is Fifth in line from the Sun.
• It is the largest planet in the solar system.
• It is more than twice as massive as all the other planets combined.
• Jupiter's stripes and swirls are the cold, windy clouds of ammonia and water.
•  These are floating in an atmosphere of hydrogen and helium.
• Jupiter’s iconic Great Red Spot is a giant storm bigger than Earth.
• This storm has raged for hundreds of years.

Concept

• The largest object present in our solar system is the Sun.
• It is a hot glowing ball of Hydrogen and Helium.
• The Sun is a 4.5-billion-year-old.
• It is located at the centre of our solar system.

Explanation

Corona:

• The Corona layer is the outermost layer of the Sun’s atmosphere.
• It lies above the Chromosphere.
• During a total Solar Eclipse, it can be seen as a white glowing Corona.
• The temperature goes Up to 2 million degrees Celsius.
• The temperature on the Corona spreads, and its reason is still unknown.
• It starts at about 2100km above the photosphere.
• Coronal mass ejection, Solar winds, and Solar flares are the phenomenon related to Corona.

Thus, the outer layers of the Sun, extending to thousands of km above the disc (photosphere), are termed Corona.

Additional Information

Transition Region:

• The transition region is a very thin layer.
• A layer of about (60 miles / 100 km).
• It lies between the chromosphere and the corona.
• The temperature rises abruptly from about 8000 to about 500,000 K.

Chromosphere:

• The Chromosphere is visible as a dim red ring.
• It lies just above the Photosphere.
• Only visible light from the Chromosphere can be seen when the Photosphere is hidden during Solar Eclipses.
• With the increase in height, its temperature increases.

Stratosphere:

• It is a part of the earth’s atmosphere.
• Above the troposphere lies the stratosphere.
• It extends up to a height of 50 km.
• This layer is almost free from clouds and associated weather phenomena.
• It is ideal for flying aeroplanes.
• It contains a layer of ozone gas, protecting us from the harmful effect of the sun's rays.

The correct answer is Jupiter, Saturn, Neptune and Uranus.

Important PointsThese three planets in our Solar System are known to have ring systems.

Jupiter is the largest planet of the solar system.

• It is so large that about 1300 earths can be placed inside this giant planet. However, the mass of Jupiter is about 318 times that of our Earth.
• It rotates very rapidly on its axis. Jupiter has a large number of satellites.
• It also has faint rings around it.
• Jupiter can be easily recognised as it appears quite bright in the sky.
• If you observe it with the help of a telescope, you can also see four of its large moons.

Saturn is the most famous for its prominent ring system that is composed primarily of ice particles with a smaller amount of rocky debris and dust.

• These rings are made mostly from chunks of ice, ranging in size from tiny grains to massive chunks several meters in diameter.
• There are thousands of individual rings, although they are usually grouped into larger ring structures like the A, B, and C rings.
• Saturn's rings are also the brightest of all the planets, reflecting a lot of sunlight due to their icy composition. 

Uranus also has a complex ring system.

• The rings of Uranus are distinctly different from those at Saturn, being darker and more sparse.
• Uranus has 13 known rings, which are named simply by the order of their discovery.
• The rings are made up of very dark material - scientists think this might be organic compounds processed by radiation, similar to the makeup of some asteroids. 

Neptune

• Neptune's rings are faint and composed mainly of dust particles and small rocks.
• There are five principal rings named Galle, Le Verrier, Lassell, Arago, and Adams.

Concept

• Rings around the planet are made up of minute and tiny particles.
• Made of rock and very small pieces of ice.
• They are bits left over from the formation of the planet.

Explanation

Mercury

• It is the smallest planet in our solar system.
• It is nearest to the Sun.
• It is only slightly larger than Earth's Moon.
• Mercury is not the hottest planet in our solar system.
• It does not have a ring.

Thus, mercury does not have a ring around it.

Additional Information

Jupiter 

• Jupiter is Fifth in line from the Sun.
• It is the largest planet in the solar system.
• It is more than twice as massive as all the other planets combined.
• Jupiter's stripes and swirls are the cold, windy clouds of ammonia and water.
•  These are floating in an atmosphere of hydrogen and helium.
• Jupiter’s iconic Great Red Spot is a giant storm bigger than Earth.
• This storm has raged for hundreds of years.
• Jupiter has rings of ice and smaller dust particles.

Saturn

• Saturn is the sixth planet from the Sun.
•  It is the second-largest planet in our solar system.
• It has thousands of beautiful ringlets.
• Rings are made of chunks of ice and rock.

Uranus

• It is the seventh planet from the Sun.
• It has 13 rings that have been observed so far.
• They are all very faint.
• The majority is opaque and only a few kilometres wide.
• They are made of small dust particles.

The correct answer is meteoroids.

Key Points

• Meteoroids are small pieces of rocks or metal that travel through space and are smaller than asteroids.
• These objects orbit the sun, just like planets, and range in size from small grains to larger chunks of rock.
• When meteoroids enter the Earth’s atmosphere, they can burn up due to friction, creating a streak of light known as a meteor.
• If a meteoroid survives its journey through the atmosphere and lands on Earth's surface, it is then called a meteorite.
• Meteoroids can originate from comets or asteroids and are remnants from the early formation of the solar system.

Additional Information

• Asteroids:
  • Asteroids are larger rocky bodies that orbit the sun, primarily found in the asteroid belt between Mars and Jupiter.
• Meteor:
  • A meteor is the visible streak of light that occurs when a meteoroid burns up upon entering the Earth’s atmosphere, commonly known as a "shooting star."
• Meteorite:
  • If the meteoroid survives its passage through the atmosphere and impacts the Earth’s surface, it becomes a meteorite.
• Geoid:
  • The geoid refers to the shape of the Earth, which is not a perfect sphere but rather an oblate spheroid, slightly flattened at the poles.
• Galaxy:
  • A galaxy is a large system of stars, planets, gas, and dust bound together by gravity, with our solar system being part of the Milky Way galaxy.

Key PointsISRO:

• The headquarters of ISRO is situated in Bengaluru.
• The Secretariat of DOS and headquarters of ISRO are located at Antariksh Bhavan in Bangaluru.
• ISRO was formed on 15 August 1969.
• S. Somanath is the current chairman of ISRO.
• PSLV-C25, twenty-fifth flight of PSLV launched Mars Orbiter Mission Spacecraft.
• It was launched from the First Launch Pad at Satish Dhawan Space Centre SHAR, Sriharikota.
• Its motto is Space Technology in the Service of Mankind.

​Thus, the motto of ISRO is Space Technology in the Service of Mankind

• Comets 
  • Comets are also members of our solar system. 
  • They revolve around the Sun in highly elliptical orbits. 
  • However, their period of revolution round the Sun is usually very long. A Comet appears generally as a bright head with a long tail. 
  • The length of the tail grows in size as it approaches the sun. 
  • The tail of a comet is always directed away from the sun. Many comets are known to appear periodically. 
  • One such comet is Halley’s comet, which appears after nearly every 76 years. It was last seen in 1986. 
• Meteors
  • The small pieces of rocks which move around the sun are called meteoroids.
  • Sometimes these meteoroids come near the earth and tend to drop upon it.
  • During this process due to friction with the air they get heated up and burn.
  • It causes a flash of light. Sometimes, a meteor without being completely burnt, falls on the earth and creates a hollow.
• Artificial satellites
  • Artificial satellites are man-made.
  • They are launched from the Earth. They revolve around the Earth much closer than earth’s natural satellite, the moon.
  • India has built and launched several artificial satellites. Aryabhata was the first Indian satellite. Some other Indian satellites are INSAT, IRS, Kalpana-1, EDUSAT, etc. 
  • Artificial satellites have many practical applications.
  • They are used for forecasting weather, transmitting television and radio signals. They are also used for telecommunication and remote sensing.