Now is the season of warm spring in bloom, and the air is full of flowers, which is a _ _ _ _ _ phenomenon; When the weather is clear and the temperature is high, the fragrance is stronger. This is because _ _

In Harbin in May, flowers are everywhere, because the molecules of flowers are constantly moving irregularly, which is a diffusion phenomenon; The higher the temperature, the stronger the random movement of molecules, the faster the movement and the stronger the smell.

So the answer is: diffusion; The higher the temperature, the more intense the irregular movement of molecules.