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What does it look like?

Marijuana is a green or gray mixture of dried, shredded flowers and leaves of the hemp plant (Cannabis sativa).

How is it used?

Most users roll loose marijuana into a cigarette called a "joint". Weed can be smoked in a water pipe, called a "bong", or mixed into food or brewed as tea. It has also appeared in cigars called "blunts".

What are its short-term effects?

Short-term effects of marijuana include problems with memory and learning, distorted perception (sights, sounds, time, touch), trouble with thinking and problem solving, loss of motor coordination, increased heart rate, and anxiety.These effects are even greater when other drugs are mixed with weed. A user may also experience dry mouth and throat.

What are its long-term effects?

Marijuana smoke contains some of the same cancer-causing compounds as tobacco, sometimes in higher concentrations.Studies show that someone who smokes five joints per week may be taking in as many cancer-causing chemicals as someone who smokes a full pack of cigarettes every day.

What is its federal classification?

Schedule I

Source

National Institute on Drug Abuse (NIDA)