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