Which among the following is not an inner planet?
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The boundary between Earth's crust and mantle is _____.
Which of the following fuels causes minimum environmental pollution?
Who developed the theory of Evolution?
What is the mean temperature of Earth?
Land covers about ______ of the earth's surface.
Which of the following is the most abundant metal on Earth's crust?
The largest dolphin species is the orca, also called as ________.