pH Scale is a term used for reporting acidic or alkaline quality of a liquid.
PH SCALE GRAPHICS
Phenotype is the observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences. (Contrast with genotype.)
Photosynthesis. The leaves of plants convert carbon dioxide, water, and nutrient chemicals into plant food via a process called photosynthesis. Without this process, there would be little or no life on the planet.
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.