What is the approximate circumference of earth?
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Which among the planets is orange in colour with white bands on it?
Green House Effect' means
Name the international treaty designed to protect the ozone layer from CFCs.
A ________________ is known by different names in different parts of the world. It is called a ‘hurricane’ in North America.
The name of the space shuttle, which carried the Indian born Kalpana Chawla into space was
What is the name of the most ancient spiral galaxy that existed 11 billion years ago?
Evaporation of water takes place in which part of plants?
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