The four main spheres of earth are the cryosphere, hydrosphere, biosphere, and atmosphere atmosphere, hydrosphere, anthrosphere, and atmosphere astrosphere, hydrosphere, lithosphere, and biosphere atmosphere, hydrosphere, lithosphere, and biosphere

The four main spheres are:

Biosphere: the organic matter and the living organisms including humans and animals

Athmosphere: the air and the gasses that surround the Earth - including the air we breathe

Lithosphere: the rocks of the planet
and finally, the last one:

Hydrosphere: the water systems of Earth.

Are there any words that will you

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