June 21 marks the winter solstice in the _________ Hemisphere.
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When warm air rises up and cold air from the surrounding areas rushes in to fill its place then this sets up ________________ in air.
An _______________ is a sudden shaking or trembling of the earth.
Study of earth is known as
What is the maximum number of Members of the Rajya Sabha?
Comptroller and Auditor General of India is appointed by ______.
Who is the the present (March 2018) Prime Minister of Pakistan?
What is the name of the technology developed by Australian Scientists to transform soybean oil into graphene?