Answer:
A smell is created when a substance releases molecules (particles) into the air. For us to detect the smell, those molecules need to enter our nose. ... These receptors then send signals to an area of the brain called the olfactory bulb and the chemical composition of the mix of odours it determined
Step-by-step explanation:
Gases, liquids, and even some solids. We can smell them all as long as some of the object's molecules can enter a gaseous state. We smell gases because their molecules are free to enter our noses. We smell liquids because some of their molecules enter the gas phase after escaping from the liquid surface.