These DAV Class 6 SST Book Solutions and DAV Class 6 SST Chapter 3 Question Answer – Locating Places on the Earth are thoughtfully prepared by experienced teachers.
DAV Class 6 SST Ch 3 Question Answer – Locating Places on the Earth
DAV Public School Class 6 SST Chapter 3 Question Answer – Locating Places on the Earth
Something To Know
A. Tick (✓) the correct option.
The equator does not pass through which one of the following continents?
(b) South America
The heat zone lying between 23 V20 N and 66V20 N is
(a) Frigid zone
(b) Torrid zone
(c) Temperate zone
(d) Time zone
(c) Temperate zone
The longest circle drawn midway between two poles is
(b) Prime Meridian
(c) The Tropic of Cancer
(d) The Tropic of Capricorn
When the time is 12 noon at 0° longitude, the time at 75°E longitude will be
(a) 4 p.m.
(b) 5 p.m.
(c) 3 p.m.
(d) 11 p.m.
(b) 5 p.m.
Which one of the following is a correct statement about longitudes?
(a) Their length is the longest at the poles.
(b) Their length is the shortest at the equator.
(c) All of them have equal lengths.
(d) Their length reduces towards the poles.
(c) All of them have equal lengths.
B. Fill in the blanks.
1. The earth rotates from …………… to ……………
2. All the places on the same meridian will have the ……………. local time.
3. The distance between the two lines of latitudes is always ……………
4. The …………… are the imaginary lines that connect the north and south poles.
5. Each degree of longitude corresponds to a time difference of …………….. minutes.
1. west; east
C. Match the following
|Two equal division of earth||(a) 23° 30’ N|
|Latitudes are measured in||(b) Mirzapur|
|Tropic of Cancer||(c) Hemispheres|
|British Royal Observatory||(d) Degrees|
|The place through which Standard Meridian of India passes||(e) Greenwhich|
|Two equal division of earth||(c) Hemispheres|
|Latitudes are measured in||(d) Degrees|
|Tropic of Cancer||(a) 23° 30’ N|
|British Royal Observatory||(e) Greenwhich|
|The place through which Standard Meridian of India passes||(b) Mirzapur|
D. Answer the following questions in brief.
Which two basic points on the earth serve as the reference points?
North Pole and South Pole.
Mention the latitudinal location of the heat zones of the earth.
The torrid zone lies between the Tropic of Cancer and the Tropic of Capricorn and is also known as the tropical zone. It is the hottest zone of the earth. Two temperate zones i.e. North temperate zone lies between the Tropic of Cancer and the Arctic Circle, while the South temperate zone lies between the Tropic of Capricorn and the Antarctic Circle. There are two frigid zones, one in the north and the other in the south.
Why does the Torrid zone have the maximum temperature?
In this zone, the rays of the sun are exactly overhead once a year except on the equator, where the mid-day sun is overhead twice a year. Hence, it receives maximum heat from the sun and is very hot.
What is the significance of Greenwich Mean Time?
We know that all the lines of longitudes are equal. In such a case it was essential to select one particular line of longitude for numbering them. The line of longitude passing through the Royal British Observatory at Greenwich near London has been adopted as the Prime Meridian or 0° Longitude. The local time of Greenwich is called the Greenwich Mean Time. It is used to calculate the Standard Time of a country.
Why is the Standard Meridian selected by a country a multiple of 7.5°?
The Standard Meridian selected by a country is a multiple of 7.5° so that the difference between its standard time and the Greenwich Mean Time is expressed in the multiple of Trait an hour’.
E. Answer the following questions.
State three main characteristics of parallels of latitudes.
- All of the imaginary circles parallel to the equator are called parallels of latitudes.
- These circles have varying centres and all these central points lie on the same line-the axis of the earth.
- As we move away from the equator, the circumference of the circle decreases.
- While writing the parallels of latitudes, it is essential to write either letter N or S with them.
Why do we use standard time? Explain with an example of India.
Places located on different meridians have different local time. It would create a lot of difficulties, if all countries would adopt different local time. The railway time-table and the schedules of the air flights would be difficult to prepare. People crossing the longitudes would have to adjust their watches. In order to avoid this problem and maintain its uniformity all over a country, it was decided to adopt the local time of a central meridian of a country as the Standard Time.
Thus, standard time is used only for convenience. We can give example of our own country. We know India lies between 68°E and 97° 25’E longitudes. The people of the country would face problems if they follow the different local times. For convenience and for uniformity, we have a Standard Meridiem set at Allahabad (80° 30’E), which gives the time for all over India.
Which heat zone is most suitable for us to live and why?
The earth on which we live, is divided into three heat zones on the basis of the amount of heat received from the sun. The temperate zones receive slanting rays of the sun and thus are neither too hot nor too cold. It is the most suitable for us to live.
Why is the time difference between each meridian of longitude 4 minutes? Explain.
The earth completes one rotation in 24 hours. This means that 360° longitudes face the mid-day sun one after the other in 24 hours. Thus, 15° longitude passes before the sun in a period of one hour or 60 minutes. It means, it takes 4 minutes to cross one longitude before the sun. Hence, the time difference between each meridian of longitude is 4 minutes.
Distinguish between Equator and Prime Meridian.
- The imaginary circle passing through the centre of the earth, and perpendicular to the axis, is called the equator. The imaginary circle passing through Greenwich in Britain and perpendicular to the equator, and parallel to the axis, is called the Prime Meridian.
- Equator divides the earth into two equal halves-the Northern Hemisphere and the Southern Hemisphere. The Prime Meridian divides the earth into the Eastern Hemisphere and the Western Hemisphere,
Some countries have non-standard time zones, usually with a 30-mmute offset (a few have a 45-nnuute offset). Time zones’ boundaries are irregular mainly because of political factors, and so this has been a subject of criticism. Time zones can be determined by how countries’ and states’ borders are positioned. Individual zone boundaries are not straight because they are adjusted for the convenience and desires of local population. Moreover, some geographically large countries, such as India and China, use only one time zone where as other large countries don’t do the same. How does one time zone in a country, like India, help towards unity in diversity?
From Kashmir to Kanyakumari and from Arunachal to Ankaleshwar, our religious and cultural backgrounds symbolise diversity in various fields. But the richness of our traditions lies in the belief that all cultures are equal. Also one time zone in our country helps towards unity in diversity. For example, we celebrate our festivals at a time, and our respect and faith in the cultural diversity keep India united and integrate.
On the outline map of the world, show –
(b) Tropic of Cancer,
(c) Tropic of Capricorn
(d) Arctic Circle,
(e) Antarctic Circle
(f) Prime Mertian
Something To Do
Study the atlas and find out the location of the following cities with reference to latitudes and longitudes.
|(a) Delhi||28° 36′ N||77° 14′ E|
|(b) London||51° 30′ N||0° 7′ W|
|(c) Tokyo||35° 41′ N||139° 41′ E|
|(d) Singapore||1° 17′ N||103° 50′ E|
|(e) Cairo||30° 30′ N||31° 14′ E|
In your notebook, draw the diagram of Heat Zones showing the values of different
DAV Class 6 Social Science Chapter 3 Question Answer – Locating Places on the Earth
A. Tick (✓)the correct option.
The Tropic of Cancer is located at
(a) 23‘/a0 N
(b) 23Va° S
(c) 6614° N
(d) 66%° S
(a) 23‘/a0 N
The heat zone with the coldest climate is the
(a) Frigid Zone
(b) Torrid Zone
(c) Temperate Zone
(d) None of these
(c) Temperate Zone
Each degree of latitude is divided into
(a) 15 minutes
(b) 0.30 minutes
(c) 60 minutes
(d) 90 minutes
(c) 60 minutes
The total number of longitudes on both sides of the Prime Meridian is
The time difference between Greenwich and India is
(a) 1 hour 30 minutes
(b) 3 hours
(c) 3 hours 30 minutes
(d) 5 hours 30 minutes
(d) 5 hours 30 minutes
B. Very Short Answer Type Questions
What happens to the size of the latitudes when we move away from the equator?
The size of the latitudes decreases.
Name the heat zone in which equator lies.
Which are the fixed points on the earth?
They are North Pole and South Pole.
Suppose the latitude of a place is 8 degree, 4 minutes and 25 seconds. How can you express it?
We can express it as 8°, 4′, 25″.
Name the parallel drawn midway between two poles which forms two hemispheres.
What is the latitude of the equator?
The latitude of the equator is 0°.
What is the number of latitudes on the earth?
Including the equator, there are 181 latitudes on the earth.
Why do some parts of the earth receive more heat than other parts?
Because of the variation in the angle of the rays of the sun.
What is the characteristic feature of the Temperate zone?
It is neither too hot nor too cold.
Which are the two sets of lines used to locate any place on the earth?
The lines of latitude and longitude are used to locate any place on the earth.
What do you mean by the Indian Standard Time?
We have a Standard Meridian set at Allahabad, i.e. 82° 30′. It gives us the time for all over India. This time is called the Indian Standard Time.
Where does the Frigid zone lie?
It lies near the poles.
Name two latitudes between which the Torrid zone exists.
The Tropic of Cancer and the Tropic of Capricorn.
In which hemisphere is the Arctic Circle located?
The Arctic Circle is located in the Northern Hemisphere.
What is the value of the Prime Meridian?
C. Short Answer Type Questions
Besides the equator and two poles, there are four important lines of latitude. Describe them.
The other four important lines of latitude are –
- The Tropic of Cancer lies at 23’A0 N. The sun rays fall vertically on 21st June eveiy year here.
- The Tropic of Capricorn lies at 2314° S. The rays of the sun are vertical on 22nd December eveiy year here.
- The Arctic Circle is located at 6614° N. The sun shines for 24 hours on 21st June eveiy year on this latitude.
- The Antarctic Circle is located at 6614° S. The sun shines for 24 hours on 22nd December every year on it.
Describe the different heat zones existing on the earth.
There are three heat zones –
Torrid zone. This zone lies between the Tropic of Cancer and the Tropic of Capricorn. The sun rays are directly overhead in this zone. Hence, it receives maximum heat from the sun and is extremely hot.
Temperate zone. The zone between the Tropic of Cancer and the Artie circle is called the North Temperate zone and the zone between the Tropic of Capricorn and Antarctic Circle is called the South Temperate zone. The sun rays are never directly overhead. Hence, this zone is neither very hot nor very cold.
Frigid zone. This zone lies from Arctic Circle to the North Pole and from Antarctic Circle to the South Pole. It receives the sunlight of very low intensity and, therefore, remains covered with ice and snow for the most of the year.
Why is it 5.30 pm in India when it is 12.00 noon in London?
India and the United Kingdom lie on different longitudes. Each degree of longitudes corresponds to a difference of four minutes. This is because the earth completes one rotation in 24 hours, which means that 360° longitudes face the mid-day sun one after the other in 24 hours, i.e., 1° in 4 minutes. The standard meridian of India is 82° 30’E and that of London is 0°. This means a difference of 4 minutes x 82.5 = 330 minutes = 5.5 hours. So, when it is 12 noon in London, it is 5.30 pm in India.
How do latitudes and longitudes help in locating places on the earth?
The lines of latitude and longitude intersect each other and form a grid. Two different points may lie on the same latitude, or the same longitude. But there exists only one point where a latitude and longitude intersect. So, a place can be identified with the help of the latitude and longitude on which it lies.
What are lines of longitude? Mention two characteristics of the lines of longitude.
The longitudes are a set of imaginary vertical lines. They are in the form of semi-circles which join two poles and are called lines of longitude or meridians of longitude.
Two characteristics of the lines of longitude are –
- The line of longitude intersect at the equator and other parallels of latitude at right angles.
- They are all equal in length. They are drawn all around the globe at an interval of an angle of 1°.
D. Long Answer Type Questions
Differentiate between the following:
(a) Latitudes and Longitudes
(b) Local time and Standard time
(a) Latitudes are the imaginary circles parallel to the equator. Longitudes are also imaginary circles but they are parallel to the Prime Meridian.
- The length of latitudes decreases gradually from the equator to the poles but the length of all the longitudes is equal.
- The total number of latitudes is 181 whereas the total number of longitudes is 361.
- With the help of latitudes we know the temperature of a particular place but longitudes help us in the calculation of the local time of a place.
(b) The time at a particular place is said to be the local time. The local time of one meridian differs from the other. Standard time of a country or a region is the time regarded as a standard for that place, despite the fact that there exists time difference geographically across that region. It is used only for convenience.
Why are the lines of latitude called parallels of parallels of latitude? Describe them with the help of a diagram.
The lines of latitude are the imaginary lines which encircle the earth. They are parallels of equator and, therefore, called parallels of latitude. The important lines of latitude are –
(i) The Equator – It is the 0° latitude.
(ii) The two Poles – North Pole and the South Pole. They are 90° N and 90° S respectively.
(iii) The Tropic of Cancer – Its latitudinal value is 23%° N.
(iv) The Tropic of Capricorn – Its latitudinal value is 23%° S.
(v) The Arctic Circle – Its value is 66%° N.
(vi) The Antarctic Circle – Its value is 66%° S.
What is grid? Draw a neat and labelled diagram of grids of parallels and meridians.
Grid is a network of parallels of latitudes and meridians of longitudes.