Class 6 Social Science - ICSE-GEOGRAPHY
Latitudes and Longitudes
The chapter 'Latitudes and Longitudes' in Class 6 ICSE Geography introduces students to the global grid system used to locate any place on Earth accurately. Students learn about the imaginary lines of latitude (parallels) and longitude (meridians), the Equator, the Prime Meridian, and the important heat zones of the Earth. Understanding this chapter is crucial for ICSE board exams as it forms the foundational basis for map reading, calculating time zones, and understanding global climate patterns in higher classes.
Start Learning FreeKey Concepts
Latitudes (Parallels)
Imaginary horizontal lines running from east to west around the Earth, with the Equator being the 0-degree latitude that divides the Earth into Northern and Southern Hemispheres.
Longitudes (Meridians)
Imaginary vertical lines running from the North Pole to the South Pole, with the Prime Meridian passing through Greenwich, London, set at 0 degrees.
Grid System
The network formed by intersecting latitudes and longitudes, which helps in pinpointing the exact location of any place on the Earth's surface.
Local Time vs Standard Time
Local time is calculated based on the position of the Sun (noon), while Standard Time is a uniform time adopted by a country based on a central meridian to avoid confusion.
Heat Zones of the Earth
Regions classified based on the amount of heat received from the Sun, divided into the Torrid Zone, Temperate Zones, and Frigid Zones.
Important Formulas
Board Exam Info
In ICSE Geography, this chapter typically carries 5 to 8 marks, appearing in both objective sections (fill in the blanks, MCQs) and subjective sections (short answers, distinguishing between parallels and meridians, and numericals on time calculation).
Frequently Asked Questions
Why are latitudes called parallels?
Latitudes are called parallels because they run in an east-west direction and remain at an equal distance from each other all the way around the Earth, never meeting.
How do we calculate time using longitudes?
Since the Earth rotates 360 degrees in 24 hours, it covers 15 degrees in one hour, meaning every 1 degree of longitude equals a 4-minute time difference (ahead to the east, behind to the west).
What is the difference between the Equator and the Prime Meridian?
The Equator is the 0-degree latitude dividing the Earth into Northern and Southern Hemispheres, while the Prime Meridian is the 0-degree longitude dividing it into Eastern and Western Hemispheres.
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