NCERT Solutions For Class 6 Geography Social Science Chapter 1 The Earth in the Solar System
Question 1. What do animals and plants require in order to grow and survive?
Answer:
Plants and animals require oxygen and water to survive while they require proper nutrition to grow.
Geography Chapter 1 The Earth in the Solar System Exercise
Question 1. Answer the following questions briefly.
(1) How does a planet differ from a star?
Answer:
The planet differs from a star in different ways such as
- The planet moves around the Sun while the star remains fixed.
- The planet doesn’t have its own light and heat but stars have their own light and heat.
- The planets are generally smaller in size than stars.
(2) What is meant by the ‘solar system’?
Answer:
The Sun, eight planets, satellites, and other celestial bodies known as asteroids and meteoroids form the solar system.
(3) Name all the planets according to their distance from the Sun.
Answer:
The planets according to their distance from the Sun are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
(4) Why is the Earth called a unique planet?
Answer:
The Earth is a unique planet in the solar system because it is the only planet where life exists.
(5) Why do we see only one side of the Moon always?
Answer:
We always see only one side of the Moon because the Moon takes about 27 days to complete a spin of the Earth which is similar to its time of one revolution and because of its revolution, we can see only one side of the Moon.
(6) What is the universe?
Answer:
The collection of millions of galaxies is called the universe.
Question 2. Tick the correct answer.
(1) The planet known as the “Earth’s twin” is
- Jupiter
- Saturn
- Venus
Answer: 3. Venus
(2) Which is the third nearest planet to the Sun?
- Venus
- Earth
- Mercury
Answer: 2. Earth
(3) All the planets move around the Sun in a
- circular path
- rectangular path
- elongated path
Answer: 3. Rectangular path
(4) The Pole Star indicates the direction of the
- South
- North
- East
Answer: 2. North
(5) Asteroids are found between the orbits of
- Saturn and Jupiter
- Mars and Jupiter
- Earth and Mars
Answer: 2. Mars and Jupiter
Question 3. Fill in the Blanks
(1) A group of …… forming various patterns is called a …….
Answer: stars, constellation
(2) A huge system of stars is called ……..
Answer: galaxy
(3) …….. is the closest celestial body to our Earth.
Answer: The Moon
(4) …….. is the third nearest planet to the Sun.
Answer: The Earth
(5) Planets do not have their own ……. and ……
Answer: light, heat
Question 4. During a vacation, visit a planetarium and describe your experience in the class.
Answer:
I visited the Nehru Planetarium in Delhi during my vacation. I went there with my parents and elder brother. My experience of the planetarium was fantastic and enjoyable.
I have learned a lot after visiting there. I got to know about the movement of planets and satellites. I also came to know about the stars and constellations. I learned about the functioning of the following things by visiting the planetarium
- Solar System The live show about the structure and functioning of the solar system revealed the arrangement of planets, satellites, asteroids, and meteoroids. I also came to know about how the entire solar system is moving because of gravitation. It showed how the Sun emits light and heat1.
- Structure of Planets The program showed the structure of each planet’s surroundings and surface with ‘how was it made’.
- Structure of Satellites The show also revealed the structure and movement of satellites like the Moon and artificial satellites, etc. The functioning of artificial satellites was shown.
- Eclipse Half an hour program explained the cause that creates the condition of both solar and lunar eclipses.
- Stars The short film also explained how the stars emit light and heat and how massive.
- Apart from these, all the exhibition of photos with short descriptions made me aware of the universe and its components. After visiting the planetarium, I made an entry in my diary and made a project on it.
Geography Chapter 1 The Earth in the Solar System Multiple Choice Questions (MCQs)
Question 1. The period between a full Moon and a new Moon is known as
- Solar eclipse
- Lunar eclipse
- Fortnight
- Constellation
Answer: 3. Fortnight
Question 2. What are celestial bodies that emit their own heat and light called?
- Planets
- Stars
- Satellites
- Asteroids
Answer: 2. Stars
Question 3. What is the term for a pattern formed by different groups of stars?
- Orbits
- Constellations
- Rings
- Satellites
Answer: 2. Constellations
Question 4. The Pole Star is also known as
- Alpha Centauri
- North star
- Sirius
- Vega
Answer: 2. North star
Question 5. What is the source of heat and light for the solar system?
- Moon
- Stars
- Planets
- Sun
Answer: 4. Sun
Question 6. Which among the following planets has rings?
- Earth
- Saturn
- Mars
- Uranus
Answer: 2. Saturn
Question 7. Which is the smallest planet in our solar system?
- Earth
- Mercury
- Venus
- Jupiter
Answer: 2. Mercury
Question 8. In Roman mythology, what does ‘Sol’ represent?
- Moon
- Sun
- Stars
- Planets
Answer: 2. Sun
Question 9. How far is the Sun from the Earth?
- 1 million km
- 50 million km
- 150 million km
- 500 million km
Answer: 3. 150 million km
Question 10. What is the term for the path in which a planet or satellite moves around?
- Constellation
- Orbit
- Geoid
- Eclipse
Answer: 2. Orbit
Question 11. Which celestial body is considered the Earth’s twin due to its shape and size?
- Jupiter
- Venus
- Mars
- Saturn
Answer: 2. Venus
Question 12. What is the shape of the Earth called?
- Ellipsoid
- Geoid
- Sphere
- Cube
Answer: 2. Geoid
Question 13. What makes the Earth known as the ‘blue planet’?
- Presence of air
- Presence of water
- Presence of life
- Extreme temperatures
Answer: 3. Presence of life
Question 14. Who was the first man to step on the surface of the Moon?
- Buzz Aldrin
- Yuri Gagarin
- Neil Armstrong
- Michael Collins
Answer: 3. Neil Armstrong
Question 15. Which ancient astronomer said that the Moon and planets shine due to reflected sunlight?
- Galileo Galilei
- Johannes Kepler
- Aryabhatta
- Copernicus
Answer: 3. Aryabhatta
Question 16. What is the term for an artificial body designed to gather information about the universe or for communication?
- Asteroid
- Meteoroid
- Satellite
- Planet
Answer: 3. Satellite
Question 17. What is the term for small pieces of rocks that move around the Sun?
- Satellites
- Meteoroids
- Asteroids
- Constellations
Answer: 2. Meteoroids
Question 18. Our solar system is a part of which galaxy?
- Andromeda Galaxy
- Milky Way Galaxy
- Sombrero Galaxy
- Triangulum Galaxy
Answer: 2. Sombrero Galaxy
Question 19. Who named the Milky Way Galaxy as ‘Akash Gang a’?
- Aristotle
- Aryabhatta
- Galileo Galilei
- Copernicus
Answer: 2. Aryabhatta
Question 20. What is the shape of the Earth’s orbit around the Sun?
- Circular
- Elliptical
- Rectangular
- Spherical
Answer: 2. Elliptical
Question 21. The Earth is the third planet from the Sun in our solar system and is a unique place for living beings. It is also known for its diverse ecosystems, abundant water, and delicate balance of environmental Conditions.
Consider the following statements about the Earth and choose the incorrect option.
- The Earth completes one rotation in 24 hours.
- Venus is known as the twin sister of the Earth.
- It is also known as the ‘Blue Planet’.
- The Earth is approximately 3,84,400 km away from the Sun.
Answer: 4. The Earth is approximately 3,84,400 km away from the Sun.
Question 22. Which of the following statements is correct regarding the planets in our solar system?
- ‘Mercury is the closest planet to the Sun and has an extreme temperature.
- Saturn is often referred to as the ‘Red Planet’.
- Jupiter is the second largest planet of our solar system.
- Pluto (Dwarf Planet) was classified as a planet in 2006.
Answer: 1. ‘Mercury is the closest planet to the Sun and has extreme temperatures.
Question 23. Rajesh from Ladakh, an Astronomy enthusiast has observed an increasing number of artificial satellites orbiting Earth, contributing to concerns about space debris. What is the most likely consequence of this growing trend?
- Improved communication technologies.
- Enhanced weather prediction accuracy.
- Increased risks of satellite collisions and space debris.
- Advancements in space exploration.
Answer: 3. Increased risks of satellite collisions and space debris.
Question 24. Identify the correct option that describes the name of the planet given below.
- It is in the center of the solar system.
- It is huge and made up of extremely hot gases.
- It provides the pulling force that binds the solar system.
Options
- Saturn
- Earth
- Neptune
- Sun
Answer: 4. Sun
Question 25. Which of the following statements is/are correct?
- The shape of the Earth is elliptical.
- The Moon is a natural satellite of the Earth.
- Saturn has no rings at all.
Codes
- 1 and 2
- Only 2
- Only 1
- Only 3
Answer: 2. Only 2
Question 26. Arrange the following planets according to their positions from the Sun.
- Venus
- Mars
- Earth
- Neptune
Codes
- 1, 2, 3, 4
- 2, 1, 3, 4
- 3, 2, 1, 4
- 1, 3, 2, 4
Answer: 4. 1, 3, 2, 4
Question 27. Arrange the following planets according to their sizes
- Jupiter
- Mercury
- Uranus
- Saturn
Codes
- (1), (2), (3), (4)
- (3), (4), (1), (2)
- (2), (3), (4), (1)
- (1), (4), (3), (2)
Answer: 4. (1), (4), (3), (2)
Geography Chapter 1 The Earth in the Solar System Match the Following
Question:
Codes
- A B C D E
- 2 1 4 5 3
- 4 3 5 2 1
- 1 3 5 4 2
- 1 4 2 3 5
Answer: 1. 2 1 4 5 3
Geography Chapter 1 The Earth in the Solar System Assertion And Reason
Assertion (A) Ursa Major or Big Bear is a constellation.
Reason (R) Various patterns formed by different groups of stars are called constellations.
Codes
- Both A and R are true and R is the correct explanation of A
- Both A and R are true, but R is not the correct explanation of A
- A is true, but R is false
- A is false, but R is true
Answer: 2. Both A and R are true, but R is not the correct explanation of A
2. Assertion (A) Meteors sometimes do not burn completely and can strike the Earth’s surface and create a hollow.
Reason (R) Meteoroids are big pieces of rocks that move around the Sun and can come close to the Earth.
Codes
- Both A and R are true and R is the correct explanation of A
- Roth A and R are true, but R is not the correct explanation of A
- A is true, but R is false
- A is false, but R is true
Answer: 3. A is true, but R is false
Geography Chapter 1 The Earth in the Solar System Fill in the Blanks
Question 1. The Sun, the Moon, and all those objects shining in the night sky are called …….
Answer: celestial bodies
Question 2. The word ’planet’ comes from the Greek word …….. which means ‘wanderers’.
Answer: Planeta
Question 3. ……… is in the center of the solar system.
Answer: The Sun
Question 4. The Moon moves around the Earth in about ……. days.
Answer: 27
Geography Chapter 1 The Earth in the Solar System True/False
Question 1. Stars emit heat and light independently.
Answer: True
Question 2. The full Moon appears only once in a fortnight.
Answer: False
Question 3. The Pole Star remains constant and shows the South direction.
Answer: False
Question 4. Planets in the solar system receive light and heat from the Moon.
Answer: False
Question 5. Asteroids are large celestial bodies found between the orbits of Earth and Mars.
Answer: False
Geography Chapter 1 The Earth in the Solar System Picture Based Questions
Question 1. Identify the geographical features that exist on the satellite shown in the image.
- Occam and rivers
- Deserts and forests
- Mountains, plains, and depressions
- Lakes and valleys
Answer: 3. Mountain, plains, and depressions
Question 2. Look at the picture of asteroids given below carefully and tick the correct option.
Asteroids are part of
- Sun
- Planets
- Meteoroids
- None of these
Answer: 2. Planets
Question 3. Look at the picture of the solar system including the planets given below and answer the question that follows.
(1) How many satellites does Mars have?
Answer: Mars has two satellites.
(2) What is the name of the star at the center of our solar system?
Answer: Sun
Geography Chapter 1 The Earth in the Solar System Case Based Question And Answers
Question 1. Read the passage given below and answer the following questions.
- Our Earth has only one satellite, that is, the Moon. Its diameter is only one-quarter that of the Earth. It appears so big because it is nearer to our planet than other celestial bodies.
- It is about 3,84,400 km away from us. The Moon moves around the Earth in about 27 days. It takes exactly the same time to complete one spin. As a result, only one side of the Moon is visible to us on the Earth.
- The Moon does not have conditions favorable for life. It has mountains, plains, and depressions on its surface. These cast shadows on the Moon’s surface. Look at the full Moon and observe these shadows.
1. What is the diameter of the Moon compared to the Earth?
- Half
- One-quarter
- Equal
- Double
Answer: 2. One-quarter
2. What phenomenon causes shadows on the Moon’s surface?
- Solar flares
- Lunar eclipses
- Mountains and Depressions on the Moon
- Earth’s magnetic field
Answer: 3. Mountains and depressions on the Moon
3. In how many days Moon revolve around the Earth?
- 28
- 27
- 30
- 15
Answer: 2. 27
4. Why does the Moon not have conditions favorable for life according to the passage?
- Lack of atmosphere
- Extreme temperatures
- High gravitational pull
- Intense radiation
Answer: 1. Lack of atmosphere
Question 2. Read the passage given below and answer the following questions.
- All the eight planets of the solar system move around the Sun in fixed paths. These paths are elongated. They are called orbits. Mercury is nearest to the Sun.
- It takes only about 88 days to complete one round along its orbit. Venus is considered as ‘Earth’s-twin’ because its size and shape are very much similar to that of the Earth.
1. What is the significance of Mercury’s orbit in the solar system?
Answer:
Mercury’s orbit holds significance in the solar system as it mercury completes one round along its orbit in approximately 88 days, the shortest among all the planets. This shows its rapid movement in an elongated orbit.
2. In what way does Venus resemble Earth, as mentioned in the passage?
Answer:
- Venus is referred to as Earth’s twin due to its similar size and shape, highlighting the resemblance between the two planets in the solar system.
- The Sun is in the center of the solar system. It is huge and made up of extremely hot gases. It provides the pulling force that binds the solar system. The Sun is the ultimate source of heat and light for the solar system
3. Why Is the Sun considered the central and essential component of the solar system?
Answer:
The Sun is considered the central and essential component in the solar system as it provides the gravitational force that binds the entire system together. Moreover, the Sun serves as the ultimate source of heat and light for the solar system.
Geography Chapter 1 The Earth in the Solar System Very Short Answer Type Question And Answers
Question 1. Which celestial body remains constant and indicates the North direction?
Answer:
The Pole Star remains constant and indicates the North direction.
Question 2. What is a constellation? Give two examples.
Answer:
A group of stars forming different patterns is called a constellation. Saptarishi, Ursa Major, and Big Bear are some examples of constellations.
Question 3. What does ‘solar’ mean and from where it has originated?
Answer:
The term ‘solar’ denotes a relation to the Sun. It originated from the Roman word ‘Sol,’ meaning Sun god in Roman mythology.
Question 4. How far is the Moon from the Earth?
Answer:
The Moon is 384,400 km away from the Earth.
Question 5. What is the name of the group of seven stars that forms a part of the Ursa Major constellation?
Answer:
The group of seven stars that forms part of the Ursa Major constellation is called Saptarishi.
Question 6. What do astronomers study?
Answer:
Astronomers study about celestial bodies and their movements.
Question 7. What do you mean by human-made satellite?
Answer:
A human-made celestial body designed for communication or gathering information is called a satellite.
Question 8. What are meteoroids?
Answer:
Meteoroids are small parts of rocks that exist in space. They tend to fall on the Earth’s surface when they come close to the Earth.
Question 9. Name the planets that have rings around them.
Answer:
Jupiter, Saturn, and Neptune are the planets with rings around them.
Question 10. How did ancient people determine direction during the night?
Answer:
Ancient people determined direction at night with the help of stars. The Pole star, remaining constant, indicated the North direction.
Question 11. What do the rings around some planets consist of?
Answer:
The rings around some planets consist of belts of small debris. These rings are observable from Earth with powerful telescopes.
Question 12. What is the name of the solar system’s central star?
Answer:
The name of the solar system’s central star is the Sun.
Question 13. What is the period between the full Moon and the new Moon, when the Moon is not visible at all, called?
Answer:
The period between full Moon and new Moon, when the Moon is not visible at all, is called new Moon night or ‘ Amavasya.
Geography Chapter 1 The Earth in the Solar System Short Answer Type Question And Answers
Question 1. Why is the Moon not visible at all after a fortnight?
Answer:
- After a fortnight, the Moon becomes entirely invisible, marking the onset of the new Moon night or Amavasya.
- During this phase, the Moon is positioned between the Earth and the Sun, with its dark side facing us, making it invisible to us. This happens every month contributing to the cyclical nature of Moon phases.
Question 2. Explain about constellations with examples.
Answer:
- The various patterns formed by different groups of stars are called constellations. Ursa Major or Big Bear is an example of the constellation.
- The constellation that is very common and can be easily seen is Saptarishi (sapta means seven and rishi means sages). It is a group of seven stars, that forms a part of Ursa Major Constellation.
- One can locate the position of the Pole star with the help of the Saptarishi. If an imaginary line is drawn joining the pointer stars and extended further, it will point to the Pole star.
Question 3. Why can’t we observe bright objects in the sky during the daytime?
Answer:
- We can’t observe bright objects in the sky during the daytime because the brilliance of sunlight hides our view of bright objects in the sky during the daytime.
- The sunlight makes celestial bodies like stars, almost invisible against the bright background of the sunlit sky. This phenomenon limits our ability to observe and appreciate these objects, which become more prominent and visible in the darkened night sky.
Question 4. Differentiate between a star and a planet. Diksha
Answer:
The following differences between a star and a planet are
- Stars have their own heat and light whereas the planets do not.
- Stars are very big in size while the planets are much smaller.
- There are millions of stars but planets are only eight in number.
- Stars are stationary whereas planets move around the Sun.
Question 5. What are stars? Why can’t all celestial bodies be called stars?
Answer:
- Stars are celestial bodies characterized by their independent emission of light and heat. They are typically large and composed of gases.
- However, not all celestial bodies emit their own light and heat, preventing them from being classified as stars.
Question 6. Do you think that artificial satellites are important?
Answer:
Artificial satellites are important as they gather information about outer space and Earth’s atmosphere. They serve communication and weather prediction purposes, making them vital. These man-made satellites significantly contribute to our understanding of space.
Question 7. Why is the Sun called as the head of the solar system?
Answer:
The Sun is called the head of the solar system because the Sun is huge and made up of extremely hot gases. It is at the center of the solar system. It provides the pulling force that binds the entire solar system. Apart from this, the Sun is the ultimate source of heat and light for the solar system.
Question 8. Write a note on the galaxy and universe.
Answer:
- A galaxy is a huge system that contains billions of stars, gases, and clouds of dust. The solar system is a part of the Milky Way Galaxy.
- This galaxy is a duster of millions of stars that appear as a glowing path across the sky on a clear night. This Galaxy was named Akash Ganga as it was believed to be a river of light flowing in the sky.
- The universe comprises millions of galaxies. It is very difficult to find out the size of the universe because of its huge expansion.
Geography Chapter 1 The Earth in the Solar System Long Answer Type Question And Answers
Question 1. How is the planet different from satellites in origin and characteristics
Answer:
Question 2. The Sun, eight planets, satellites, and other celestial bodies known as asteroids and meteoroids form the solar system.’ Explain asteroids and meteoroids.
Answer:
- A large number of small celestial bodies are found between the orbits of Mars and Jupiter that move around the Sun.
- These bodies are called asteroids. Scientists believe that asteroids are the parts of a planet, which are formed by the explosion of planets many years ago.
- The small pieces of rocks that move around the Sun are called meteoroids. Sometimes, they come close to the Earth and drop upon it. During this dropping, they get heated up and burn due to friction with the air.
- This causes a flash of light. Sometimes, meteors do not get burned completely and fall on the Earth’s surface creating a hollow.
Question 3. Mention the characteristics of the Earth and conditions that are favorable to support life on the Earth.
Answer:
The characteristics of the Earth are
- The Earth is the fifth largest planet in size and the third nearest planet to the Sun.
- The shape of the Earth is called Geoid because it is a slightly flattened shape at the poles.
- The Earth is known as a blue planet because two-thirds part of its surface is covered with water and this makes it look blue from outer space.
The conditions that are favorable to support life on the Earth are
- The Earth is neither too hot nor too cold.
- It has water and air, which are very essential for our survival.
- The air of the Earth has life-supporting gases like oxygen.
Question 4. ‘The Moon is the only satellite of the Earth.’ Give characteristics of the Moon.
Answer:
The characteristics of the Moon are
- The surface of the Moon is covered with plains, mountains, and depressions which form shadows on the Moon’s surface. These shadows can be observed on full Moon day.
- The Moon is 3,84,400 km away from the Earth. The diameter of the Moon is only a quarter of the Earth. It looks bigger due to its closeness to the Earth than other celestial bodies.
- The Moon moves around the Earth in about 27 days. It takes exactly the same time to complete one spin. This makes only one side of the Moon visible from the Earth.
- The Moon is visible on most of the days. It may appear in different shapes, times, and positions. The full Moon appears only once in a month which is called full Moon night or Poornima.
- However, after a fortnight, the Moon can not be seen at all. This is the ‘new moon night’ or Amavasya. On this night one can observe a clear view of the sky.