Friday , April 10 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?

Answer: 

  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?

Answer: 

  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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