Final answer:
THC is the primary mind-altering chemical in cannabis.
Step-by-step explanation:
The primary mind-altering chemical in cannabis is THC (Tetrahydrocannabinol). THC is one of many cannabinoids found in the marijuana plant, and it is known for its psychoactive effects, which can alter mood, consciousness, and perception.
Cannabis is often used recreationally to induce a 'high' characterized by feelings of euphoria, altered thinking, and perceptions. While recreational use is common, it is important to note that cannabis and its compounds, like CBD and THC, also have medical applications. The FDA has approved medications containing THC for conditions such as nausea from chemotherapy and to help with appetite in AIDS patients.