Tuesday , October 20 2020
Our Earth – Continents and Oceans

NCERT 6th Class (CBSE) Social Science: Major Domains of the Earth

Question: Name the continents in increasing order of their size.

Answer: Generally identified by convention rather than any strict criteria, up to seven regions are commonly regarded as continents. Ordered from largest in size to smallest, they are: Asia, Africa, North America, South America, Antarctica, Europe, and Australia.

Question: Name the oceans in increasing order of their size.

Answer: On Earth, an ocean is one of the major conventional divisions of the World Ocean. These are, in descending order by area, the Pacific, Atlantic, Indian, Southern (Antarctic), and Arctic Oceans.

Question: What is the composition of the atmosphere?


  1. The atmosphere is made up of layers of colourless, odourless and testeless gases.
  2. Air is a mixture of gases, water vapour, dust particles and smoke.

Question: Name the different layers of the atmosphere.

Answer: Atmosphere layers are:

  1. Troposphere
  2. Stratosphere
  3. Mesosphere
  4. Thermosphere
  5. Exosphere.

Question: What are the main elements of biosphere?


  1. Oxygen, nitrogen, hydrogen, and carbon are the most abundant elements in Earth’s biosphere.
  2. This element is the most abundant in the biosphere and people and animals must inhale it to survive.

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