Marijuana is a mixture of dried, shredded flowers of the cannabis plant, Cannabis sativa. It goes by many different names, such as weed, pot, herb, and grass. Marijuana can be smoked, used to brew tea, and mixed in foods (edibles). Stronger forms include sinsemilla (sin-seh-me-yah), hashish (hash for short), and hash oil.
The main mind-altering chemical in marijuana is THC. Marijuana contains more than 500 chemicals, including more than 100 compounds that are similar to THC. The amount of THC in marijuana determines its potency, or strength, and how it can affect the body. Marijuana growers have been increasing the THC content of marijuana over the past few decades.
More info on website source: https://www.drugabuse.gov/publications/marijuana
