RBSE Solutions for Class 6 Social Science Chapter 4 Globe is part of RBSE Solutions for Class 6 Social Science. Here we have given Rajasthan Board RBSE Class 6 Social Science Chapter 4 Globe.
Board | RBSE |
Textbook | SIERT, Rajasthan |
Class | Class 6 |
Subject | Social Science |
Chapter | Chapter 4 |
Chapter Name | Globe |
Number of Questions | 50 |
Category | RBSE Solutions |
Rajasthan Board RBSE Class 6 Social Science Chapter 4 Globe
Textbook Activity Based Questions and Answers
Question 1.
What is meant by circumference, diameter and radius? (Page 24)
Answer:
The enclosing boundary of a circle is known as circumference. Diameter is a straight line passing from side to side through the centre of a body or figure, especially a circle or sphere. It is double the radius. Radius is a straight line from the centre to the circumference of a circle.
Question 2.
What is centripetal force? Which characteristics of a moving object impact the unit of this force? (Page 25)
Answer:
When any object is moving in a circular path, it feels an external force and this force is called centripetal force. The unit of this force depends upon the mass of the object, velocity of moving and distance from the centre. The centrifugal force is just opposite to this.
Question 3.
Equator, Greenwich line, Latitudinal and Longitudinal lines are which type of lines and what is their importance? (Page 28)
Answer:
Equator, Greenwich line, latitudinal and longitudinal lines are not actually present but they are imaginary lines drawn on the globe or maps. These lines on the globe state the exact position of any ocean, sea, continent, island, country or any other region on the earth. Longitudinal lines are used to know the time.
Question 4.
How are days counted using the International Date Line? (Page 31)
Answer:
When we travel across the International Date Line from East to West, the date is reduced by one day from the present day, and when we travel across it from West towards East, one day is added to the present date.
(Page 24)
Question 1.
During the lunar eclipse, what is the shape of the shadow of earth which falls on the moon?
Answer:
During the lunar eclipse, the shape of shadow of earth which falls on the moon is circular. This is because a spherical object will always produce a round shadow.
Question 2.
Observe the given picture and try to do this activity yourself. And say what you left. (Page 25)
Answer:
By performing the above activity, we realize that till the time the rope is moving, the sphere attached to it remains distant from us which exhibits centripetal force, but when the rope loses momentum, centrifugal force is exhibited. Stress is present in the mid of the condition of straight momentum of the rope.
Question 3.
Try to identify your country (India) on the globe. (Page 28)
Answer:
India is situated in the Northern Hemisphere. It is spread in the north of the equator between 8°44′ to 37°6′ north latitude and 68°7′ to 97°25′ east longitude. The southern point of Andaman and Nicobar group of islands expands up till Indira Point in the south till the 6°30′ northern line of latitude.
Question 4.
By looking at the map (See T.B. Page No. 30) try to find out where the International Date Line is made to be irregular and through which ocean it is passing. (Page 31)
Answer:
In order to avoid the continent situated on 75° northern line of latitude in the Arctic Ocean, it is deviated towards the east and has been passed through the Bering Water Treaty. It turns towards the west in the Bering Strait. In order to avoid Fiji Island and New Zealand, it has been turned towards the east in the Southern Pacific Ocean.
Question 5.
Find out the time in India if it is 8:00 a. m. at Greenwich (0 degree longitude). (Page 31)
Answer:
Standard time is calculated on the basis of Greenwich (0 degree longitude). This longitudinal line is situated at 82 1/2 0 in the east of the Greenwich Line. Indian time is 5:30 hours ahead of Greenwich. Therefore, if it is 8:00 a.m. in Greenwich, then we will add 5:30 hrs in its time – 8:00 + 5:30 = 13:30, i. e. in India, the time will be 1:30 p.m.
Question 6.
How do days and nights occur on earth? (Page 32)
Answer:
The earth gets light from the sun. As the earth is spherical in shape, it receives light only on one half of its portion at a single time. The other side falls in the opposite direction. Just like the light of the torch, the side of earth which faces the sun has day and that which is opposite to it has night. This cycle of day and night continues forever.
Question 7.
Calculate 5 leap years from 2012 on wards. (Page 32)
Answer:
Earth completes its one revolution of the sun in 365 days and 6 hours. Therefore, one year has 365 days. The remaining 6 hours are added and form one day of 24 hours (6 x 4=24) after every four years. Therefore, every fourth year, which is called the leap year, has 29 days in February and the leap year constitutes 366 days. The year 2012 was a leap year. The next five leap years will be 2016, 2020, 2024, 2028 and 2032 respectively.
Textbook Exercise
Question 1.
Choose the correct options
(i) The line which divides the earth into the northern and the southern hemisphere is called
(a) Tropic of Cancer
(b) Equator
(c) Tropic of Capricorn
(d) Greenwich Line
Answer:
(b) Equator
(ii) The days in a leap year are
(a) 365
(b) 366
(c) 364
(d) 363
Answer:
(b) 366
Question 2.
Fill in the blanks
1. The diameter of earth at centre is greater than the diameter at ………… ..
2. The standard time in India is decided by ………….. east longitude.
3. The earth gets light from the ……………………… .
4. On 21st June, the sun-rays fall directly on the Tropic of ……………… .
Answer:
1. poles
2. 82 1/2
3. sun
4. Cancer.
Question 3.
What is the importance of the International Date Line?
Answer:
180 degree longitude east and 180 degree longitude west is known as the International Date Line. This line indicates the beginning of new date. In the vast world, if the International Date Line did not exist, this would create a problem in the coordination of dates in the entire world. Therefore, with the point of view of coordination between dates in the world, the International Date Line is of immense importance. The date is reduced by one day from the present day when we travel from east to west across this line, and when we travel across it from west to east, one day is added to the present date.
Question 4.
Write the difference between latitudinal and longitudinal lines.
Answer:
Following are the major points of difference between latitudinal and longitudinal lines :
Latitudinal lines | Longitudinal lines |
The lines which join similar latitudes are called latitudinal lines. | The lines which join similar longitudes are called longitudinal lines. |
Latitudinal lines are imaginary horizontal lines which are drawn from the east towards the west. | Longitudinal lines are imaginary vertical lines joining the North Pole to the South Pole. |
They are 180 in number. | They are 360 in number. |
They are used to know about the temperate zones. | They are used to know about the time and date. |
Question 5.
Which are the movements of the earth? Explain.
Answer:
There are two movements of the earth:
- Every day Rotational Movement
- Annual Revolution Movement
Rotation means the movement of the earth on its axis. The earth rotates on its axis and completes one rotation in 24 hours and this is also called a solar day.
The earth revolves around the sun in a fixed path called its orbit. This is known as annual revolution movement. Earth completes its one revolution of the sun in 365 days and 6 hours, which is known as a year.
Question 6.
What is the difference between the standard time and local time?
Answer:
Standard Time – Standard time is calculated on the basis of the longitudinal line which passes from the centre of a particular country. Therefore, every country has its standard time which is applicable in the entire country. If the area of any country is very large from east to west direction, that country may have more than one standard time.
Local Time – The time of a particular place which is calculated by the position of the sun is known as the local time of that place. The time of places on the same longitude is always the same, but from east to west, on different longitudes, it is different. One country may have several local times.
Question 7.
How are days and nights formed on the earth? Explain with the help of a diagram.
Answer:
Formation of days and nights on earth is the result of the every day rotational
movement of the earth. We have learnt that the earth gets light from the sun. The earth is round and receives light on one half of its portion at one time. The side which faces the sun has day and which is opposite to it has night. As the axis of the earth forms an angle of 66 1/2 degree on the surface of the orbit of the earth, there is change in the length of days and nights on the earth.
Question 8.
To which phase or state of the earth are the changes in reasons related and why ?
Answer:
The changing of seasons is associated with the revolution movement of the earth. The earth completes one revolution of the sun on its fixed path in 365 days and 6 hours. The earth is tilted at an angle of 66 1/2 degree on its axis and it revolves round the sun in this very position only. Between March and September of every year, the light of the sun falls straight between the equator and the tropic of cancer on the earth.
At this time, the Northern hemisphere experiences summertime and the southern hemisphere experiences wintertime. In the same manner, from September to March every year, the sunrays fall straight on the equator and the tropic of capricorn. This causes winter in the northern hemisphere and summer in the southern hemisphere. On 21st March and 23rd September, when sunrays fall directly on the equator, the condition of both the hemispheres is similar. At this time, the temperature is moderate. This condition is known as equinox.
On 21st June, when the sunrays fall directly on the tropic of cancer, the northern hemisphere has extreme summers and the southern hemisphere has extreme winters. This condition is known as northern solstice. On 22nd December, the sunrays fall directly on the tropic of capricorn. At this time, the southern hemisphere has extreme summers and the northern Hemisphere has winters. This condition is known as southern solstice. In this manner, the earth completes its one revolution round the sun in one year.
Other Important Questions
Objective Type Questions
Question 1.
Who discovered that the earth is oblate ellipsoid in shape?
(a) Pluto
(b) Aryabhatta
(c) Eratosthenes
(d) Jaw Richer
Answer:
(d) Jaw Richer
Question 2.
The reason for earth bulging at the centre (Equator) is
(a) Gravitational force
(b) Centripetal force
(c) Centrifugal force
(d) None of the above
Answer:
(b) Centripetal force
Question 3.
The parallel lines drawn from the east towards the west are called
(a) Latitudinal lines
(b) Longitudinal lines
(c) International Date Line
(d) All of these
Answer:
(a) Latitudinal lines
Question 4.
What is situated between the Tropic of Cancer and the Tropic of Capricorn?
(a) Frigid zone
(b) Temperate zone
(c) Torrid zone
(d) All these
Answer:
(c) Torrid zone
Question 5.
The main meridian line is the
(a) Equator
(b) Tropic of Cancer
(c)Tropic of Capricorn
(d) 0 degree longitudinal line
Answer:
(d) 0 degree longitudinal line
Question 6.
Time taken by the earth to revolve 1° (one degree) is
(a) 15 minutes
(b) 10 minutes
(c) 4 minutes
(d) 6 minutes
Answer:
(c) 4 minutes
Match the following
1. Polar diameter | (a) Principle of gravity |
2. Polar circumference | (b) Revolution |
3. Newton | (c) Latitudinal and longitudinal lines |
4. Orbit | (d) 40008 kms (approximately) |
5. Imaginary line | (e) 180° longitudinal line |
6. International Date Line | (f) 12714 km |
Answer:
1. (f), 2. (d), 3. (a), 4. (b), 5. (c), 6. (e).
Fill in the blanks
1. The earth is a little ………………… at both the poles.
2. The axis of earth forms an angle of ……………….. on the surface of its revolutionary orbit.
3. There is a difference of ………….. in time of any two longitudes.
4. The plane that is made by the orbit is called the ………………… plane.
5. The sphere (circle) of globe which divides day and night is known as the …………… circle.
Answer:
1. flattened
2. 66 1/2 0
3. 4 minutes
4. orbital e – light
Very Short Answer Type Questions
Question 1.
What is meant by Geoid?
Answer:
Our earth is flattened at both the poles and bulging at the centre. This type of shape is known as Oblate Ellipsoid or Geoid.
Question 2.
What is the approximate difference between the latitudinal diameter and longitudinal diameter of the earth?
Answer:
43 km is the approximate difference
between the latitudinal diameter and longitudinal diameter of the earth.
Question 3.
What is the latitudinal and longitudinal circumference of the earth?
Answer:
The latitudinal circumference of earth is approximately 40075 kms and the longitudinal circumference of earth is approximately 40008 kms.
Question 4.
What is the shape of the earth at the equator and at the poles?
Answer:
The earth is bulging at the equator and flattened at both the poles.
Question 5.
What is meant by Globe?
Answer:
Globe is a miniature model of the earth which correctly represents the shape and size of various continents, oceans, different nations and islands and their distances and directions, etc.
Question 6.
Why is 0° longitudinal line called the Greenwich Line?
Answer:
0° longitudinal line passes through Greenwich city of England, and so it is known as the Greenwich Line.
Question 7.
What is Standard Time?
Answer:
The time which is identified by each country on the basis of the longitudinal line passing through its centre is known as the Standard Time of that country.
Question 8.
What is meant by solar day?
Answer:
The earth completes one rotation on its axis in 24 hours, therefore one day constitutes of 24 hours. This is known as a solar day.
Question 9.
Write the names of those countries which have more than one standard time.
Answer:
Russia, United States of America, Canada and Australia have more than one standard time.
Short Answer Type Questions
Question 1.
The time of places at same longitude is always the same and from east to west on different longitudes it is different. Explain.
Answer:
The time of places at same longitude is always the same, so when we proceed towards 1° east to know the time of a place, 4 minutes are added to the local time of that place. In the same way, when we move towards 1° west, we subtract 4 minutes from the local time of that place.
Question 2.
What is the importance of rotation of earth on its axis?
Answer:
Rotation of earth on its axis is important due to two reasons
- An easy scale of measurement of time is obtained due to the rotation of earth, due to which 24 hour’s are divided into hours, minutes and seconds.
- The physical and biotic activities of earth are significantly influenced by rotation.
Question 3.
What is meant by Equinox ?
Answer:
On 21st March and 23rd September, the sun-rays fall directly on the equator. At this time the climate in both hemispheres is almost same. It means neither much heat nor much cold. This situation is called Equinox.
Question 4.
What is meant by northern solstice and southern solstice ?
Answer:
- Northern Solstice – On 21st June, the sunrays directly fall on the tropic of cancer and due to it northern hemisphere is too hot and days are larger. This situation is known northern solstice.
- Southern Solstice – On 22nd December, the sunrays fall directly on the Tropic of Capricorn. Due to it southern hemisphere becomes hot while northern hemisphere is cold. The days in southern hemisphere are larger. This situation is known southern solstice.
Question 5.
Mention the characteristics of latitudinal lines.
Answer:
Following are the major characteristics of latitudinal lines:
- Latitudinal lines are horizontal drawn on the globe from the east towards the west.
- These are parallel lines.
- Their length decreases from the Equator towards the poles.
- Even the poles are depicted by a point.
- These fines determine various temperate zones.
Question 6.
Mention the characteristics of longitudinal lines.
Answer:
Following are the major characteristics of longitudinal lines:
- Longitudinal fines join the North Pole with the South Pole.
- The distance between the longitudinal fines is highest at the Equator.
- The distance between them goes on decreasing towards the poles.
- Longitudinal fines are used to know the time.
Question 7.
What is meant by seasons? Write the names of major seasons of India.
Answer:
Due to the revolution of the earth around the sun, such period of 2 – 3 months in which unique conditions of temperature, pressure, blowing of winds, rainfall, etc. are experienced, is known as season. In India, mainly summer, winter and rainfall are the seasons which are experienced. The position of sun plays important role in determination of seasons.
Long Answer Type Questions
Question 1.
What is meant by axis and orbit of the earth?
Answer:
When we observe the globe, we find that the earth is slightly tilted in one direction with the help of a nail passing through it. This nail is called the axis with which we can easily rotate the globe. Our earth rotates from west to east on its axis. The earth forms an angle of 66 1/2 degree from the axis and its rotation point. This means that the earth’s axis of rotation is tilted over its orbital path, as it is shown in the figure below:
Question 2.
Sunrays take 4 minutes to reach from one longitude to another longitude. Explain with an example.
Answer:
The earth rotates on its axis from the west towards the east. Therefore, sunrise takes place firstly in the eastern part of earth. In 24 hours, the earth rotates 360° on its axis, so in one hour, it revolves upto 15° (360° ÷ 24 = 15°). In the same manner, the earth takes 4 minutes to revolve 1°.
For example, the earth revolves 15° = in 1 hour (i.e. in 60 minutes)
Therefore, it will revolve 1°= 60/15= in 4 minutes.
In this way, it is proved that sunrays take 4 minutes to travel from one longitude to another.
Question 3.
How do solar eclipse and lunar eclipse take place?
Answer:
The earth and the moon continuously revolve in their orbit. During this time, such condition is formed when sun, moon and earth come in a straight line. In this situation, when moon comes between the sun and the earth, the sunrays are blocked by moon and they can’t reach the earth. This position is called solar eclipse. In the same manner, when earth comes between the sun and the moon, the sunrays are blocked by the earth and they do not fall on the moon. This position is called the lunar eclipse.
Question 4.
Divide the earth into temperate zones.
Answer:
The Equator is also called the 0 degree line of latitude. Here, sunrays fall directly throughout the year and the length of day and night is equal. While proceeding towards the North Pole and South Pole from here, sunrays respectively become slanting and temperature decreases.
On the basis of latitudes, the earth has been divided into the following temperature zones:
- Torrid Zone – The region situated between Tropic of Cancer (23 1/2 degrees northern latitude) and Tropic of Capricorn (23 V% degrees southern latitude) is known as the Torrid Zone.
- Temperate Zone – The region situated from the Tropic of Cancer to 66 1/2 degrees northern latitude (Arctic Circle) and from Tropic of Capricorn to 66 1/2 degrees southern latitude (Antarctic Circle) respectively, in both the hemispheres (Northern Hemisphere and Southern Hemisphere), is known as the Temperate Zone.
- Frigid Zone – The angular distance between the Arctic Circle and the North Pole in the Northern Hemisphere and the distance between the Antarctic Circle and the South Pole in the Southern Hemisphere is called the Cold or Frigid Zone.
We hope the RBSE Solutions for Class 6 Social Science Chapter 4 Globe will help you. If you have any query regarding Rajasthan Board RBSE Class 6 Social Science Chapter 4 Globe, drop a comment below and we will get back to you at the earliest.
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