Monoterpenes are teeny-tiny little things that are made from plants. They can get smushed when you smell flowers or eat certain kinds of fruits, like lemons or oranges.
These little things are special because they give plants their smell and taste. Think about how different a lemon smells compared to a rose, for example.
Scientists can look at these monoterpenes and use them to figure out what kind of plant they came from. This is really important for things like making medicine or creating new flavors for foods.
So basically, monoterpenes are like little scent and taste detectives that come from plants. Pretty neat, huh?