Locating Places on the Earth Class 6 Notes

Locating Places on the Earth Class 6 Notes

Locating Places on the Earth Class 6 Notes

Understanding Map Components

1. A map is a representation or drawing of an area, ranging from small areas (villages) to large areas of the world.
2. An atlas is a book or collection of maps.
3. Physical maps show natural features like mountains, oceans, and rivers etc.
4. Political maps show details of countries or states, boundaries, cities, etc.
5. Thematic maps provide specific information.
6. Three key components of maps: distance, direction, and symbols.
7. Map scale is important for determining how a large area fits on a small piece of paper.
8. Each centimetre on the map represents a certain distance between the two points.
9. The actual distance between two points on a map depends on the scale used.

Map Components and Symbols

1. Maps use four cardinal directions (north, at the top, east, south, and west) and intermediate directions (northeast, southeast, southwest, and northwest).
2. Symbols represent features like buildings, roads, railway lines, and natural elements.
3. Map makers use specific symbols to make maps more understandable to different users.
4. Different countries use different sets of symbols. The Survey of India has its own a set of symbols for maps of India.

Mapping the Earth: Understanding Coordinates

1. The Earth’s shape is spherical, not flat, making accurate mapping difficult.
2. Representing a sphere on a flat sheet of paper is not possible due to the spherical shape of the Earth.
3. A globe, a sphere on which a map is drawn, is a better representation of the Earth’s geography due to its spherical shape.
4. Understanding coordinates is important in mapping, as it allows precise location determination.
5. In a market or chessboard, a system of coordinates is used to mark each square and record every move.
6. This system is used to determine the location of any place on a map.

Understanding Latitudes and Climate

1. Latitudes are the fixed points at the top and bottom of the globe, with the Equator halfway between them.
2. As one moves towards one of the poles, their distance from the Equator increases.
3. Latitude measures this distance, drawing a parallel of latitude around the Earth.
4. The largest circle is the Equator, while the circles marked by latitude parameters grow smaller as we move northward or southward.
5. Latitudes are expressed in degrees, with the Equator being latitude 0° and the poles being 90° North and 90° South respectively.
6. Latitude and climate are connected, with hotter climate around the Equator, more temperate, moderate climate as one moves away, and colder climate closer to the North on South Pole.

Longitudes :

1. Meridians of longitude are half-circles running from one pole to the other.
2. The Earth spins on its axis, affecting time zones.
3. The Prime Meridian, also known as Greenwich Meridian, is the reference point for longitudes.
4. Longitude measures the distance from the Prime Meridian if traveling along the Equator.
5. It is measured in degrees, increasing from 0° to 180°, with the letter ‘W or ‘E’ added.
6. New York’s longitude is 74°W, while Delhi’s is 77°E, and Tokyo’s is 140°E.
7. Latitude and longitude together are the two coordinates of a place, enabling the location of any place on Earth.
8. The parallels of latitude and longitude meridians form a grid for the globe, also known as grid lines.
9. The Prime Meridian was fixed at Greenwich, the International Date Line is at approximately 180° longitude.
10. The +12 and -12 time zones touch each other at this line.
11. Crossing it by ship or plane changes the date in your watch.
12. The International Date Line deviates in places to avoid dividing some countries into two different days.

IMPORTANT TERMS AND DEFINITIONS

1. Map: A map is a representation or drawing of some areas — it may be a small area (a village, a town etc.), a bigger area (say, your district or state) or a very large area like India or even the whole world.

2. Coordinates : Sets of numbers used to determine the position of a point on a map or the Earth’s surface, usually consisting of latitude and longitude values.

3. Latitude : Latitude measures the distance either side of equator (north or south).

4. Longitude : Longitude measures the distance either side of Prime Meridian (east or west).

5. Local Time : The time hased on the position of the Sun in the sky t a specific location, varying with longitude.

6. Standard Time : A uniform time inference used within a specific region or country to maintain consistency in schedules and communication.

7. Equator : An imaginary line encircling the Earth equidistant from the poles, marking 0° latitude.

8. Prime Meridian: The meridian of 0° longitude, passing through Greenwich, England, used as the reference point for measuring longitude.

9. Scale : The ratio between distances on a map and the corresponding actual distances on the ground.

10. Compass : A navigational instrument indicating the direction of Earth.

11. Grid : A network of horizontal and vertical lines used to identify locations on a'map or globe.

12. IST (Indian Standard Time): The time standard used in India, based on the 82.5° E longitude meridian.

13. North Pole : The northernmost point on Earth, located at 90°N latitude.

14. South Pole : The southernmost point on Earth, located at 90°S latitude.

15. International Date Line (IDL): An imaginary line located approximately at 180° longitude, opposite the Prime Meridian.