Oceans and Continents | Social Science Grade 6 CBSE

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The map of the world in six terms

The surface of the Earth has a simple vocabulary. Tap each term to see what it means and how the ideas — the seven continents, the five oceans, the giant landmass Pangaea, and how we read a map — fit together.

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The three big ideas

A continent is a very large continuous block of land. The Earth has seven: Asia, Africa, North America, South America, Antarctica, Europe and Australia.
Asia is the largest — in both area and number of people — and India lies in Asia. Africa is the second largest.
Australia is the smallest continent. It is unusual because it is also a single country.
Antarctica, around the South Pole, is buried under thick ice and has no permanent population — only visiting scientists.
Europe and Asia sit on one connected landmass (sometimes called Eurasia) but are counted as two separate continents for reasons of history and culture.

Common mistake: mixing up a country with a continent. India is a country within the continent of Asia; Australia happens to be both a country and a continent.

Oceans are huge bodies of salt water that cover much more of the Earth than the land does. There are five: the Pacific, Atlantic, Indian, Southern (Antarctic) and Arctic.
The Pacific is the largest and deepest ocean. The Atlantic is the second largest.
The Indian Ocean is the only ocean named after a country — India sits at its northern shore, with the Arabian Sea to the west and the Bay of Bengal to the east.
The Southern Ocean surrounds Antarctica, and the Arctic Ocean around the North Pole is the smallest and is frozen for much of the year.
All the oceans are joined together, so really there is one continuous world ocean that we have divided into five named parts.

Worked example. A spice ship sails from the western coast of India towards Africa. Which ocean does it cross?

From India’s west coast it enters the Arabian Sea, which is part of the Indian Ocean. For centuries traders used the monsoon winds to cross this very ocean between India, Arabia and East Africa.

Pangaea was a single giant supercontinent. Millions of years ago all of today’s continents were joined together in it.
Over a very long time, Pangaea slowly broke apart and the pieces drifted to where they are now. This slow sliding is called continental drift.
The clues: the coastlines of South America and Africa seem to fit together like puzzle pieces, and similar rocks and fossils are found on continents now far apart — signs they were once joined.
Reading a map needs three tools: directions (a north arrow; the others follow), a key or legend (what each symbol and colour stands for), and a scale (how distance on the map matches real distance).
On a physical map, blue shows water, green shows low plains, and yellow and brown show higher land and mountains.

Common mistake: thinking continental drift is fast or finished. The continents move only a few centimetres a year — about as fast as your fingernails grow — and they are still drifting today.

Where you'll meet it

Continents and oceans at work

Monsoon trade routes

For thousands of years, sailors crossed the Indian Ocean by riding the seasonal monsoon winds — out towards Arabia and Africa in one season, home to India in another. Knowing the ocean was as important as knowing the land.

Shared fossils, split continents

Identical plant and animal fossils turn up in India, Africa, Antarctica and Australia. The simplest explanation is that these lands were once joined in Pangaea — a real-world detective case solved by reading the rocks.

Maps for everyday journeys

From a wall map in your classroom to a trekking map of the Western Ghats, the same three tools — directions, key and scale — let you turn a flat sheet into a guide for a real journey across land or sea.

Check yourself

Competency quiz

Modelled on the competency-based pattern — MCQ, assertion–reason and a case study, testing whether you can use the ideas, not just recall them.

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