What is the mean temperature of Earth?
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What is the source of natural energy of the hot springs at Manikaran in Himachal Pradesh ?
The 'solid waste' is also known as
The largest dolphin species is the orca, also called as ________.
______ is the time taken by the earth to return to a given point in its orbit with reference to a fixed star.
Which of the following is NOT a metamorphic rock?
A deep crack in a glacier is called
What is the name of the most ancient spiral galaxy that existed 11 billion years ago?