Correction appended, April 20, 2015.

The legalization of marijuana in Colorado, Washington, Oregon, Alaska, and Washington D.C. has moved pot from the realm of criminal arrest to customer service. But many of those now-legal customers are entering a new world of products, prices, and potency. It ain’t about a ten-dollar bag of weed anymore. During the two years I spent researching Weed the People, I acquired a new vocabulary of weights, measures, brand names, plant strains, and markers of quality. With 4/20 upon us, test your own legal pot knowledge with the quiz below.

Correction: The original version of this quiz misstated the states that rejected legalization in the past five years.

“Weed the People, the Future of Legal Marijuana in America,” from TIME Books, is available wherever books are sold, including Amazon.com, Barnes & Noble and Indiebound.

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