Biosphere vs. Hydrosphere — What's the Difference?

The biosphere (from Greek βίος bíos "life" and σφαῖρα sphaira "sphere"), also known as the ecosphere (from Greek οἶκος oîkos "environment" and σφαῖρα), is the worldwide sum of all ecosystems. It can also be termed the zone of life on Earth.

The hydrosphere (from Greek ὕδωρ hydōr, "water" and σφαῖρα sphaira, "sphere") is the combined mass of water found on, under, and above the surface of a planet, minor planet, or natural satellite. Although Earth's hydrosphere has been around for about 4 billion years, it continues to change in shape.

The part of the earth and its atmosphere in which living organisms exist or that is capable of supporting life.

The waters of the earth's surface as distinguished from those of the lithosphere and the atmosphere.

The living organisms and their environment composing the biosphere.

The water vapor in the earth's atmosphere.

The part of the Earth and its atmosphere capable of supporting life.

All the liquid waters of the Earth, as distinguished from the land and the gases of the atmosphere.

The totality of living organisms and their environment.

The aqueous vapor of the entire atmosphere.

The regions of the surface and atmosphere of the Earth (or other planet) where living organisms exist

The aqueous envelope of the earth, including the ocean, all lakes, streams, and underground waters, and the aqueous vapor in the atmosphere.

The watery layer of the earth's surface; includes water vapor