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It is gaseous layer above the Earth's layer composed of 78% nitrogen and 21% oxygen and 1% other gases.

• Biosphere

• Atmosphere

• Geosphere

• Hydrosphere

The zone of Earth where all forms of life exists.

• Hydrosphere

• Atmosphere

• Biosphere

• Geosphere

The water part of the Earth that comprises 70% coverage.

• Geosphere

• Hydrosphere

• Atmosphere

• Biosphere

Solid part of the Earth

• Geosphere

• Atmosphere

• Hydrosphere

• Biosphere

Where can water be found in a SOLID state on Earth?

• glacier

• waterfall

• cloud

• steam

Water can be found in earth's atmosphere, on earth's surface and _________.

• in outer space

• underground

• in a tree

Ninety seven percent of the earth's water is ________.

• fresh water

• frozen water

• wet water

• salt water

What state is water in when it falls from clouds on a warm sunny day?

• solid

• liquid

• gas

If water is surrounded by land it can be called a __________.

• river

• desert

• ocean

• lake

Three percent of the earth's water is __________.

• ice water

• fresh water

• salt water

• rain water