The largest dolphin species is the orca, also called as ________.
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Marble comes under which category of rocks?
UV rays coming from Sun, majorly causes which cancer?
_________ influences the rate of weathering and humus in soil formation.
What is formed when Magnesium is burnt?
Any undesirable change in physical, chemical or biological characteristics of air, land, water or soil is called?
Which of the following is the most abundant metal on Earth's crust?
Precipitation in the form of a mixture of rain and snow is called