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Hydrosphere

Across
A place where freshwater from a river meets and mixes with salt water from the ocean
A hole sunk into the earth to such a depth as to reach a supply of water
A measure of how acidic or how basic a liquid is
A solid inorganic substance of natural occurrence
An organism used to monitor the health of an ecosystem
The continuous movement of water between Earth's surface and its atmosphere
Water that collects on the surface of the ground
An ecosystem found in or relating to the ocean
Inorganic compounds made up of nitrogen and oxygen
In a solution, a substance that does the dissolving
A microorganism, especially a bacterium causing disease or fermentation
Down
The saltiness of a body of water
The rules of water quality that have to be followed to be able to drink
The following of practices that protect Earth's resources
Pollution that comes from a single, identifiable site
Water that is safe to drink or to use for food preparation
The chemical, physical, biological, and radiological characteristics of water that define how safe it is
Pollution that comes from many places or an unidentified source
A measure of how clear water is
All the water found on, above, and under the Earth's surface
Any process that improves the quality of water to make it more acceptable for specific end-use
Safe to consume/drink
A part of the Earth's surface that is covered by ocean water
A substance that an organism needs to carry out life functions
To observe and make sure that something is done right