What is the SI unit that refers to the amount of a substance?

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

When a scientific theory has been tested and proved by the scientific community, it becomes a law

What type of organic molecule comprises the majority of a potato?