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pH scale

pH Scale is a term used for reporting acidic or alkaline quality of a liquid.

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Phenotype

Phenotype is the observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences. (Contrast with genotype.)

Photovoltaic cells (solar cells)

A photovoltaic cell ( solar cells) is a term used to describe devices that convert solar radiation directly to electricity. PV’s are a sort of semiconductor that catches the light and turn into pure and clean power. These devices are sound and smoke-free, no moving parts.