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?
- The atmosphere is made up of layers of colourless, odourless and testeless gases.
- Air is a mixture of gases, water vapour, dust particles and smoke.
Question: Name the different layers of the atmosphere.
Answer: Atmosphere layers are:
Question: What are the main elements of biosphere?
- Oxygen, nitrogen, hydrogen, and carbon are the most abundant elements in Earth’s biosphere.
- This element is the most abundant in the biosphere and people and animals must inhale it to survive.