Locating Places on the EarthClass 6 Social Science NCERT Solutions
8 Solutions
Generated by KedovoAI
Solution 1 of 8
Q1Questions, activities and projects
Returning to page 10 and to Fig. 5.2 in Chapter 5 of this textbook, taking the scale to be 2.5 cm = 500 km, calculate the real distance from the estuary of the Narmada River to the estuary of the Ganga river. (Hint: round off your measurement on the map to an easy number.)
Solution
This question requires using a map from Chapter 5, which is not provided here. However, the method to calculate the distance can be explained based on the information in this chapter.
To find the real distance between two points on a map, you should follow these steps:
-
Measure the distance on the map: Use a ruler to measure the straight-line distance in centimeters between the estuary of the Narmada River and the estuary of the Ganga river on the map (Fig. 5.2).
-
Use the map's scale: The given scale is 2.5 cm on the map represents 500 km on the ground.
-
Calculate the real distance: You can set up a simple proportion to find the actual distance. The formula would be:Real Distance (in km) = (Measured distance on map in cm / 2.5 cm) × 500 km
For example, if the distance you measured on the map was 5 cm, the calculation would be:
Real Distance = (5 / 2.5) × 500 = 2 × 500 = 1000 km.
Q2Questions, activities and projects
Why is it 5:30 pm in India when it is 12 pm or noon in London?
Solution
The time difference between India and London is due to their different longitudinal positions on the Earth.
- Earth's Rotation: The Earth rotates on its axis from west to east, completing a full 360-degree rotation in 24 hours. This means the Earth rotates 15 degrees of longitude every hour (360° / 24 hours = 15°/hour).
- Prime Meridian: The Prime Meridian, which passes through Greenwich in London, is the starting point for measuring longitude and is set at 0° longitude. Time at Greenwich is called Greenwich Mean Time (GMT).
- Indian Standard Time (IST): India is located to the east of Greenwich. Indian Standard Time (IST) is calculated based on a longitude that is 5 hours and 30 minutes ahead of GMT. This corresponds to a longitude of 82.5° East (5.5 hours × 15°/hour = 82.5°).
Therefore, because India is east of London, its time is ahead. When it is 12:00 pm (noon) in London (GMT), we must add 5 hours and 30 minutes to find the time in India. This makes the time in India 5:30 pm.
Q3Questions, activities and projects
Why do we need symbols and colours in the map?
Solution
We need symbols and colours on a map to represent a large amount of information clearly and in a limited space.
-
Symbols: A map is a drawing of a large area on a small piece of paper. It is not possible to draw the actual shapes and sizes of features like buildings, roads, railway lines, rivers, or temples. Instead, map makers use standard symbols to represent these features. For example, a specific symbol can represent a post office or a railway station. Using symbols allows a map to show numerous details without becoming cluttered and unreadable.
-
Colours: Colours are used to help users easily distinguish between different types of features on a map. For instance, as mentioned in the chapter, blue-coloured areas typically represent water bodies like lakes, rivers, and oceans. Other common conventions include using brown for mountains, green for forests, and yellow for plains. This colour coding makes the map easier to interpret at a glance.
Q4Questions, activities and projects
Find out what you have in the eight directions from your home or school.
Solution
This is an activity-based question that requires personal observation. To answer it, you would identify your school or home as the central point and then list important landmarks in each of the eight directions.
The eight directions are:
- Cardinal Directions: North (N), South (S), East (E), West (W)
- Intermediate Directions: North-East (NE), South-East (SE), South-West (SW), North-West (NW)
Here is a sample answer:
From my school:
- North: The public library.
- East: The main market.
- South: The main road and bus stop.
- West: A large public garden.
- North-East: The post office.
- South-East: The railway station.
- South-West: A residential apartment complex.
- North-West: The city hospital.
Q5Questions, activities and projects
What is the difference between local time and standard time? Discuss it in groups, with each group writing an answer in 100 to 150 words. Compare the answers.
Solution
The main difference between local time and standard time is that local time varies from place to place, while standard time is uniform across a large region or an entire country.
Local Time:
Local time is determined by the position of the sun at a specific location. It is noon (12:00 pm) at a place when the sun is at its highest point in the sky. Since the Earth is constantly rotating, places on different longitudes experience noon at different times. For example, as the sun rises in the east, the local time in Assam will be ahead of the local time in Gujarat.
Standard Time:
If every place in a large country followed its own local time, it would cause great confusion for travel, communication, and business. To avoid this, most countries adopt a standard time. This is the local time of a central meridian of longitude that passes through the country. The entire country then follows this single, uniform time. For example, all of India follows Indian Standard Time (IST), even though the local time in the easternmost part of the country is about two hours ahead of the local time in the westernmost part.
Q6Questions, activities and projects
Delhi's and Bengaluru's latitudes are 29° N and 13° N; their longitudes are almost the same, 77° E. How much will be the difference in local time between the two cities?
Solution
There will be almost no difference in the local time between Delhi and Bengaluru.
Time on Earth is determined by longitude, not latitude. Longitudes are imaginary lines running from the North Pole to the South Pole, and as the Earth rotates, these lines pass under the sun. Places on the same longitude experience sunrise, noon, and sunset at approximately the same time.
In this case, both Delhi and Bengaluru are located at almost the same longitude (77° E). Latitude (29° N for Delhi and 13° N for Bengaluru) measures the distance north or south of the Equator and affects climate, but it does not affect time. Since the two cities share the same longitude, their local times will be virtually identical.
Q7Questions, activities and projects
Mark the following statements as true or false; explain your answers with a sentence or two. → All parallels of latitude have the same length. → The length of a meridian of longitude is half of that of the Equator. → The South Pole has a latitude of 90° S. → In Assam, the local time and the IST are identical. → Lines separating the time zones are identical with meridians of longitude. → The Equator is also a parallel of latitude.
Solution
→ All parallels of latitude have the same length.
False. The parallels of latitude are circles that become smaller as one moves from the Equator towards the poles. The Equator is the longest parallel of latitude.
→ The length of a meridian of longitude is half of that of the Equator.
True. Meridians of longitude are semi-circles that run from the North Pole to the South Pole. The Equator is a full circle around the Earth. Therefore, the length of a meridian is approximately half the length of the Equator.
→ The South Pole has a latitude of 90° S.
True. The latitudes are measured from 0° at the Equator to 90° at the poles. The South Pole is located at 90° South latitude.
→ In Assam, the local time and the IST are identical.
False. IST is the standard time for the whole country, based on the 82.5° E meridian. Assam is located to the east of this meridian, so its local time (based on the sun's position) is actually ahead of IST.
→ Lines separating the time zones are identical with meridians of longitude.
False. While time zones are broadly based on meridians of longitude, the actual boundary lines often zigzag to follow international and national borders for political and practical convenience.
→ The Equator is also a parallel of latitude.
True. The Equator is the most important parallel of latitude, and it is designated as 0° latitude. All other parallels are drawn parallel to it.
Q8Questions, activities and projects
Solve the crossword below. Across Lets you squeeze a huge area into your map A convenient sphere The longest parallel of latitude The place the Prime Meridian is attached to So convenient to find your way A measure of the distance from the Equator Down 2. A measure of the distance from the Prime Meridian 3. These two together allow us to locate a place 6. What latitudes and longitudes together create 7. The time we all follow in India 9. On top of the world 11. An abbreviation for a line across which the day and date change
Solution
Across
- SCALE
- GLOBE
- EQUATOR
- GREENWICH
- MAP
- LATITUDE
Down
2. LONGITUDE
3. COORDINATES
6. GRID
7. IST
9. NORTHPOLE
11. IDL