What is smell?

A smell is created when a substance releases molecules into the air. For us to detect the smell, those molecules need to enter our nose. The more volatile the substance is (the more easily it gives off molecules), the stronger its smell.
• Musky smells Musky perfumes used to be made from the secretion of a special gland on the musk deer, like the one pictured here. Think about your mom’s perfume or your dad’s aftershave: these have a lot of musk. In fact, the musky smell comes from a chemical called muscone which comes from deer and some plants, and people used to collect muscone from them to make perfumes. People now use artificial compounds made in the lab that mimic the musky smell.
• Floral smells Floral smells resemble the smells from flowers. Flowers release these smells to attract animals. Floral smells are also used in a lot of perfumes and candles, because they are very pleasant.
• Pungent smells Pungent smells are very strong and sharp for example Vinegar is often described as pungent or hot spices from chili peppers.
• Peppermint smells Mint is a plant that creates a chemical called menthol. There are different varieties of mint, like spearmint and peppermint. Many people like mint, and mint smells are often in a lot of candies.
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