An alkaline substance that has a pH that exceeds 7,5.
The smallest unit of matter that is unique to a particular element. They are the ultimate building blocks for all matter.
The interacting system of a biological community and its non-living environmental surroundings.
An opening in a membrane or medium that allows water to pass through.
The degree of hotness or coldness.
An atom in a solution that is charged, either positively (cations) or negatively (anions).
A process that uses electrical current applied to permeable membranes to remove minerals from water. Often used to desalinize salty or brackish water.
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The uppermost part of the windpipe, the sphincter guarding the entrance to the trachea and functioning as the sound-producing organ of the throat.
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