In 1981, ISRO launched India's first geostationary satellite called -
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Concentration of water vapour in troposphere is
______ 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 minerals is not found in the plateau regions?
In terms of size, Saturn ranks no. ___ in our Solar System.
Who discovered Pluto?
Why does ice covered in sawdust not melt quickly?
Malachite is an ore/mineral of