A physical change to a substance can never be reversed

increase or decrease the mass of a substance

changes to type of matter the substance is made of

changes one or more of the physical properties of a substance

Two things that biomedical has invented or innovated

What are fructose and glucose an example of?

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone,due to its high light availability and warm water temperature