Hemp and marijuana are both members of the cannabis family, but they have distinct differences in their chemical makeup, physical characteristics, and uses.

1. Chemical Composition: The main difference between hemp and marijuana is their chemical composition. Hemp contains a low concentration of THC (tetrahydrocannabinol), the psychoactive compound that is responsible for the “high” associated with marijuana use. In contrast, marijuana contains high levels of THC, which can range from 5% to 30% depending on the strain.
2. Legality: Another significant difference between hemp and marijuana is their legal status. Hemp is legal in most countries, including the United States, as long as it contains less than 0.3% THC. In contrast, marijuana is still illegal at the federal level in the United States and many other countries, although some states have legalized it for medical or recreational use.
3. Physical Characteristics: Hemp and marijuana also have different physical characteristics. Hemp is typically taller and has thinner leaves than marijuana. It is also grown differently, with plants spaced farther apart to promote growth of the stalks, which are used for fiber production. Marijuana, on the other hand, is grown more densely to produce buds that contain high levels of THC.
4. Uses: Hemp and marijuana have different uses. Hemp is primarily used for industrial purposes, such as producing paper, textiles, and biofuels. It is also used in the production of CBD oil, a non-psychoactive compound that has been shown to have potential health benefits. Marijuana is primarily used for recreational and medicinal purposes due to its high THC content.

In summary, while hemp and marijuana are both members of the cannabis family, they have distinct differences in their chemical composition, legality, physical characteristics, and uses. Understanding these differences is important for anyone who wants to use or work with these plants.