Oceans and Continents | Class 6 Social Science Notes
By ConceptScroll Team · Published on 17 July 2026 · 3 min read
Oceans and Continents – this guide gives you a concise, exam-ready overview of Oceans and Continents from Class 6 Social Science, written by ConceptScroll editors and reviewed against the latest NCERT textbook.
Ocean Life
Oceans hold most of the Earth's water and are home to a vast diversity of life forms. The seawater is salty and unsuitable for drinking by most land animals, including humans. Freshwater is scarce and found in glaciers, rivers, lakes, the atmosphere, and underground as groundwater. Marine life includes a wide range of organisms from microscopic plants called algae to large mammals such as whales and dolphins. Coral reefs, starfish, sea anemones, sharks, dolphins, emperor penguins, and sea turtles are some examples of ocean fauna. Each part of the ocean, from the sunlit surface to the dark depths, supports unique ecosystems. Oceans produce more than half of the world's oxygen through their plant life, making them the 'lungs of the planet.' However, oceans face threats from pollution, overfishing, and human activities, which endanger marine biodiversity. Protecting ocean life is essential for maintaining Earth's ecological balance and human well-being.
📊 Diagram: A star fish on a sea anemone; Shark Dolphins; Sperm whale, mother and baby; Shallow coral reef with colourful tropical fish; Algae; Emperor penguins; Bonaire sea turtle
🧪 Activity: Think about why water scarcity exists despite the abundance of ocean water and discuss water-saving methods practiced locally.
🔗 Connection: This section leads to a detailed look at the five oceans of the world and their characteristics.
Frequently asked questions
1. What are oceans and continents? What are their names and their distribution?
Oceans are the largest water bodies on Earth, covering almost three-fourths of the Earth's surface. Continents are large continuous expanses of land, covering a little over one-fourth of the Earth's surface. The five oceans are the Pacific Ocean, Atlantic Ocean, Indian Ocean, Arctic Ocean, and Southern Ocean. Continents and oceans are unevenly distributed between the Northern and Southern Hemispheres, with the Northern Hemisphere having more land and the Southern Hemisphere more water.
2. In what ways do oceans and continents impact life on Earth, including human life?
Oceans and continents shape the Earth's climate, influencing weather patterns and temperatures. They affect all forms of life including plants, animals, and humans. Oceans provide habitats for marine life and influence rainfall and temperature. Continents provide land for human habitation, agriculture, and biodiversity. Their distribution affects cultural history and daily human activities.
→ What are the circular lines in each map called? And do you know what the lines radiating out of the two poles are called? (Hint: you studied them in the previous chapter, but here they are presented differently.) → Which hemisphere holds more water? → What do you think could be the approximate proportion of water to land in the Northern Hemisphere? And in the Southern Hemisphere? Discuss in groups. → Are all the oceans connected with one another, or are there separations between them?
1. The circular lines in each map are called parallels or lines of latitude. The lines radiating out of the poles are called meridians or lines of longitude. 2. The Southern Hemisphere holds more water compared to the Northern Hemisphere. 3. Approximate proportion: Northern Hemisphere has more land than water (about 60% land, 40% water), while the Southern Hemisphere has more water than land (about 80% water, 20% land). 4. All oceans are connected; the divisions on maps are conventional boundari
## LET'S EXPLORE Locate the five oceans and, in the table below, mark the hemisphere or hemispheres they belong to. | | Northern Hemisphere | Southern Hemisphere | | --- | --- | --- | | Pacific Ocean | | | | Atlantic Ocean | | | | Indian Ocean | | | | Southern Ocean | | | | Arctic Ocean | | |
Pacific Ocean: Both Northern and Southern Hemispheres Atlantic Ocean: Both Northern and Southern Hemispheres Indian Ocean: Both Northern and Southern Hemispheres Southern Ocean: Southern Hemisphere only Arctic Ocean: Northern Hemisphere only
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