In a food chain, what is the difference between primary consumers and secondary consumers?
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The space shuttle which took Sunita Williams beyond earth was
The Ozone layer is present in which atmospheric layer?
What is Syzygy?
Particulates (< 1 μm size) remaining suspended in air indefinitely and transported by wind currents are called
Who was the first Indian astronaut to travel in space?
The source of energy in an ecosystem is
During the past century, the temperature of Earth has increased by ________.