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the process during which nitrogen gas is converted into substances that can be used by plants, like ammonium and nitrate ions.
the stratosphere extends from a height of 10 km to 50 km above the surface of the Earth.
this consists of three separate layers of the Earth â the crust, the mantle and the core.
any different samples of a chemical compound will be made of the same elements (will have the...
the theory of acids and bases which defines an acid as a proton donor and a base as a hydroxide...