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