Solar System Important Questions

---

Very Short Answers Questions [1 Mark Questions]

Ques. Asteroids are found between the orbits of

1. Mars and Jupiter
2. Saturn and Uranus
3. Saturn and Jupiter
4. The Earth and Mars

Ans. The correct answer is a. Mars and Jupiter

Explanation: Asteroids are found between the orbits of Mars and Jupiter. This is known as the asteroid belt. It is a region of the Solar System located between 2.1 and 3.3 astronomical units (AU) from the Sun.

Ques. Which among the following planets is known as Veiled Planet

1. Jupiter
2. Venus
3. Mars
4. Uranus

Ans. The correct answer is b. Venus

Explanation: Venus is known as the Veiled Planet because its surface is covered by a thick cloud cover that makes it difficult to observe.

Ques. Which one of the following planets has the shortest day?

1. Mars
2. Mercury
3. Earth
4. Venus

Ans. The correct answer is c. Earth

Explanation: Of the following options, Earth has the shortest day i.e. 24 hours. The length of the day on Mars is 24 hours and 37 minutes, on Mercury it is 59 Earth days, and on Venus, it is 243 Earth days.

Ques. Which of the following is called the yellow planet?

1. Earth
2. Uranus
3. Mars
4. Venus

Ans. The correct answer is d. Venus

Explanation: The planet Venus is called the Yellow Planet. It appears yellow because its atmosphere is dense with clouds of sulfuric acid and other chemicals that absorb blue light while reflecting yellow and red light. 

Ques. Which is the hottest planet in our solar system?

1. Pluto
2. Mercury
3. Mars
4. Venus

Ans. The correct answer is d. Venus

Explanation: Venus is the hottest planet in our solar system.

Ques. The Solar System is located in _____ galaxy.

1. Andromeda
2. Milkyway
3. Triangulum
4. Black eye

Ans. The correct answer is b. Milkyway

Explanation: The Milky Way is the galaxy that contains the Solar System, and the term refers to how the galaxy appears from Earth: a hazy band of light seen in the night sky produced by stars that cannot be identified individually with the human eye.

Ques. On which planet the life exists

1. Earth
2. Mars
3. Jupiter
4. Venus

Ans. The correct answer is a. Earth

Explanation: Life exists only on the planet Earth.

Ques. Stars appear to move from

1. West to east
2. South to west
3. East to west
4. North to south

Ans. The correct answer is c. South to west

Explanation: Because of the rotation of the earth, the stars appear to move from east to west. The earth rotates around its axis from west to east. As a result, stars appear to move from east to west.

Ques. The tilting of the earth is responsible for

1. Change of days
2. Change of the season
3. Change in the sun's rays
4. None of the above

Ans. The correct answer is b. Change of the season

Explanation: The spin axis of the Earth is tilted with respect to its orbital plane. This is what gives rise to the seasons. Summer is in that hemisphere when the earth's axis points towards the sun. Winter can be expected when the earth's axis is tilted away from the sun.

Ques. How many planets are there in the Solar System?

1. 8
2. 9
3. 10
4. 11

Ans. The correct answer is a. 8

Explanation: The Solar System has eight planets. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune are the eight planets.

---

Short Answers Questions [2 Marks Questions]

Ques. Why is it called the Solar System?

Ans. The planetary system is known as the "solar system" because the Sun is termed Sol after the Latin word for Sun, "Solis," and anything associated with the Sun is referred to as "solar." Our solar system is located in the Milky Way galaxy's outer spiral arm.

Ques. How did the Solar system originate?

Ans. The Solar System was formed by the gravitational collapse of a massive interstellar molecular cloud 4.6 billion years ago.

Ques. Why does the Moon change its shape daily?

Ans. The Moon does not emit light; the ' moonlight' we see is the Sun's light reflected off the lunar surface. As the Moon revolves around the Earth, the Sun lights various parts of it, giving the appearance that the Moon is changing shape.

Ques. Where do most comets arrive from?

Ans. Comets are thought to have two origins. Short-period comets originate in the Kuiper Belt, whereas long-period comets are produced in the Oort Cloud.

Ques. Is the solar system expanding?

Ans. Because of the binding force of gravity, solar systems do not expand despite being in a universe that is expanding.

Ques. Is the Sun the hottest in the Solar System?

Ans. The Sun, of course, is the hottest place in the Solar System. And the core of the Sun is the hottest part of it. The surface temperature of the sun is just 5,800 Kelvin, whereas its core temperature is roughly 15 million Kelvin.

Ques. What is a Solar System?

Ans. The Solar System is composed of the Sun and the objects that orbit it. In order of distance from the Sun, the biggest eight objects that comprise a planetary system are four terrestrial planets, Mercury, Venus, Earth, and Mars; and four giant planets, which include two gas giants, Jupiter and Saturn, and two ice giants, Uranus and Neptune.

Ques. What is the Big Bang theory?

Ans. The Big Bang Theory is an astrophysical model of the universe that humans can evidence. 

• The theory describes the universe's beginnings, from its early forms to its present evolutions.
• The Big Bang Theory describes how the universe developed from a highly dense and hot beginning state by providing a thorough explanation of observable events, radiation, an abundance of light elements, and large-scale structures.

Ques. Do stars emit light only during the night?

Ans. No, the stars radiate light throughout the day, however, the light of the stars cannot be seen due to the brightness of the sun.

Also Read:

---

Long Answers Questions [3 Marks Questions]

Ques. What is a solar system made of?

Ans. The solar system is made up of the Sun, a normal star in the Milky Way Galaxy, and the bodies that circle it:

• There are eight planets and around 170 identified planetary satellites.
• There are several asteroids, some of which have satellites.
• Comets, as well as other ice bodies
• Interplanetary medium refers to the expanses of highly tenuous gas and dust between planets.

Ques. Why does the moon have different shapes on different nights?

Ans. The reason for the different shapes on different nights of the moon is

• We see the moon because the sunlight that falls on it reflects back to us.
• As a result, we only see the region of the moon where the Sun's light is reflected back to us.
• We observe distinct phases on different nights because the moon rotates around the earth, therefore the part of the moon's lighted surface varies from night to night.

Ques. What is the common misconception about the Big Bang Theory?

Ans. The most common misconception about the Big Bang Theory is that it describes the whole origin of the universe but fails to address the energy, time, and space required in its development. 

• It simply explains how the cosmos arose from its primordial condition of high temperature. 
• It would be incorrect to draw similarities to common objects while attempting to describe the Big Bang Theory, especially when it comes to scale. 
• The theory simply defines the size of the visible universe, not the entire universe. 
• While treatment using simpler Doppler effect reasoning yields almost comparable findings for local galaxies, interpreting the redshift of more distant galaxies as attributable to the simplest Doppler redshift treatments might generate misunderstanding.

---

Very Long Answers Questions [5 Marks Questions]

Ques. Meteors are not visible during the day. Explain the Reason.

Ans. Meteors are small particles that travel at tremendous speeds through the atmosphere of the Earth. 

• They are not visible during the day because their brightness is so low in comparison to the brightness of the Sun.
• When a meteor impacts the atmosphere, friction with the air molecules causes it to heat up. 
• This causes the meteor to shine, creating a light streak across the sky. 
• The brightness of a metor, on the other hand, is normally quite weak, and it may be easily outshone by the sun's light during the day.
• Another reason meteors are not visible during the day is that sunlight is scattered by the Earth's atmosphere. 
• This scattering is responsible for the sky's blue color. During the day, the dispersed sunlight is so intense that it renders other objects in the sky, including meteors, impossible to detect.
• Meteors can, however, be seen during the day if they are especially massive and dazzling. 
• The Leonid meteor shower, for example, which occurs each year around mid-November, can produce meteors bright enough to be seen during the day. These sightings, however, are quite unusual.

Ques. What are the other objects in the solar system?

Ans. Apart from planets and moons, the solar system comprises several additional objects, such as:

• Asteroids: These are small, rocky bodies that revolve around the Sun. Asteroids may be found in the asteroid belt, which is located between Mars and Jupiter's orbits.
• Comets: These are ice bodies in elliptical orbits around the Sun. When a comet passes near to the Sun, its ice sublimates and forms a tail.
• Kuiper belt objects: These are ice bodies that circle the Sun beyond Neptune's orbit. Pluto, Eris, and Makemake are among the Kuiper belt objects.
• Oort cloud: This is supposed to be a cloud of ice bodies that surrounds the solar system. Long-period comets originate in the Oort cloud.

Ques. What is the formation of the solar system according to the nebular theory?

Ans. According to nebular theory, the solar system evolved from a massive cloud of gas and dust known as a nebula. 

• Under its gravity, the nebula began to collapse, and the material at the center became hotter and denser. 
• This resulted in the formation of a protostar in the nebula's center.
• The protostar began to spin as it continued to fall. 
• Because of the spinning, the nebula flattened into a disc around the protostar. 
• The material in the disc kept colliding and sticking together, generating larger and larger shapes. 
• These objects afterward evolved into planets, moons, and other solar system objects.

---

Previous Year Questions

1. Extraction of metal from the ore cassiterite involves...[JEE Advanced 2011]
2. Commonly used vectors for human genome sequencing are...[NEET UG 2014]
3. Interfascicular cambium and cork cambium are formed due to​..
4. Pneumotaxic centre is present in​...[UP CPMT 2007]
5. Reaction of HBr with propene in the presence of peroxide gives….[NEET UG 2004]
6. Assuming the expression for the pressure exerted by the gas on the walls of the container, it can be shown that pressure is...[MHT CET 2016]
7. Which among the following is the strongest acid?...[TS EAMCET 2017]
8. Isopropyl alcohol on oxidation forms​..
9. A vector is not changed if​..
10. Which of the following arrangements does not represent the correct order of the property stated against it?...[JEE Main 2013]

For Latest Updates on Upcoming Board Exams, Click Here: https://t.me/class_10_12_board_updates

---

Check-Out: