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Distinguish between stratosphere and troposphere.
What percentage of earth's water found in oceans?
Which is the world's longest river?
Which is the second largest continent after Asia? Mention four features of this continent.
What is 'Atmosphere'? Why atmosphere is so important?
Which two continents lie entirely in the Southern and Northern Hemisphere?
What are the major effects of water pollution?
Name the oceans that surround the continent North America.
Write the name of Indian research stations in Antarctica.
Write is the main reason of air pollution.
Write a short note on the continent – Antarctica.
Which two oceans surround South America on the east and the west?
Define global warming. State the factors responsible for it.
Why nitrogen considered as a significant gas?
Write the color used for the following: water bodies, mountain, plateau and for plains.
Write short note on Atlantic Ocean, Artic Ocean and Indian Ocean.
Why oxygen is so important?
State the percentage of the earth which is covered with water.
Why Carbon dioxide (CO2) is considered as an important constituent of air?
Why do mountaineers carry oxygen cylinders with them?